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class="ydd-author-list border-clr-B border-b-solid border-t-solid flex overflow-x-auto pl-16 pr-16 ram:pl-0 ram:pr-0 scrolling-touch whitespace-nowrap"> <div itemscope itemtype="http://schema.org/Person" itemprop="author" class="flex-inline flex-shrink-0 items-center pb-8 pr-24 pt-8"> <a class="focus-underline flex items-center" itemprop="url" href="/web/20211127184210/https://yle.fi/aihe/u/56-20-1262"> <div class="ydd-authors-list__placeholder-wrapper bg-clr-C clip-path-circle flex-shrink-0 mr-8 overflow-hidden rounded-full p-0"> <meta itemprop="image" content="https://web.archive.org/web/20211127184210im_/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_2947,h_2947,c_crop,x_168,y_636/w_700/v1499948468/39-415265596765243739b.jpg"> <div class="ydd-authors-list__image" style="background-image: 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348.3h-6c-9.2 0-13-2.3-16.2-15.2l-27.1-102.8-.3-1.1c-2.1-7.9-4-15.3-13.4-15.3h-10.2c-8.2 0-12.7 4.3-12.7 12.1 0 4.8 1.3 11.8 4.1 22.3L127 351.1c5.2 19.4 15.7 27.7 35.2 27.7h11.6c-1.2 6.4-3.8 19.7-5.5 24.8-5.3 16.4-13.5 19.9-27.6 19.9-11.6 0-19.3-.9-24.9-1.6-3.4-.4-6-.7-8.5-.7-6.6 0-10.4 4-10.4 11v6.8c0 7.7 4 10.1 8 11.8 6.9 3.1 15.5 4.8 41.4 4.8 26 0 45.3-13.9 51.6-37.3 11.4-42.4 42.1-171.1 42.4-172.4 0 0 3.4-13.6 3.4-19.9m76.9-72.3c0-13.3-1.4-26.2-17.8-26.2h-24.3c-4.4 0-16.1 0-16.1 11.5v10.7c0 4.5 2.2 12.1 17.2 12.1h6v202c0 10.8 2.2 16.6 13.8 16.6h7.9c11 0 13.2-6.6 13.2-16.6l.1-210.1zm182.8 133.2c0-33-7.6-77.6-68.4-77.6-51 0-73.7 27.8-73.7 90.1 0 60.7 21.2 83.3 78.2 83.3 25.4 0 42.1-3.5 48.7-6.5 4.1-1.7 8.1-4.1 8.1-11.9v-6.2c0-7-3.8-11-10.4-11-2.3 0-4.7.5-7.7 1-5.9 1.2-14.7 2.9-31.9 2.9-42.8 0-48.1-7.7-49.3-43h80.8c19.4.1 25.6-8.3 25.6-21.1zm-32.1-7.3l-73.6.1c1.1-30.3 12.7-43.3 38-43.3 24.9-.1 34.8 14.7 35.6 43.2"/></svg> </div> <span class="flex flex-col txt-13"> <span itemprop="name">Kerttu Kotakorpi</span> <span class="clr-C">meteorologi</span> </span> </div> </div> <div class="max-w-cod mb-32 mt-32 mx-auto pl-16 pr-16"> <div class="mb-16 mt-16"> <div class="ydd-share-buttons flex js-ydd-share-buttons"> <a class="ydd-share-buttons__button ydd-share-buttons__button--facebook block clr-lock-W cursor-pointer focus-bg-split ml-0 mr-8 rounded-full js-ydd-share-buttons-facebook" href="https://web.archive.org/web/20211127184210/https://www.facebook.com/sharer.php?u=https%3A//yle.fi/aihe/a/20-10001482%3Futm_source%3Dfacebook-share%26utm_medium%3Dsocial" aria-label="Jaa sivun sisältö palvelussa Facebook uudessa ikkunassa" target="_blank" rel="noopener"> <svg xmlns="http://www.w3.org/2000/svg" height="40" width="40" viewbox="0 0 20 20"> <path d="m12.5255,7.034l-1.443,0c-0.171,0 -0.361,0.225 -0.361,0.524l0,1.042l1.805,0l-0.273,1.486l-1.532,0l0,4.461l-1.703,0l0,-4.461l-1.545,0l0,-1.486l1.545,0l0,-0.874c0,-1.254 0.87,-2.273 2.064,-2.273l1.443,0l0,1.581z"/> 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4.908 2.182 4.908 4.874 0 2.692-2.197 4.874-4.908 4.874zm0-8.931c-2.253 0-4.086 1.821-4.086 4.057 0 .888.289 1.71.778 2.379L6.273 13.757l1.57-.499c.645.424 1.418.671 2.248.671 2.253 0 4.085-1.82 4.085-4.057 0-2.237-1.832-4.057-4.085-4.057zm1.572 6.468c-.23.012-.237.179-1.491-.367-1.255-.546-2.01-1.872-2.069-1.958-.06-.085-.486-.693-.463-1.305.023-.612.358-.901.478-1.021.119-.121.256-.146.339-.143.084 .003.167 .017.24 .019.073 .002.179-.035.274 .218.095 .253.323 .874.352 .938.029 .063.047 .136.002 .218-.045.082-.068.132-.133.203-.065.071-.137.157-.196.211-.065.059-.133.124-.065.251 .069.127 .305.544 .665.888 .462.442 .861.588 .984.655 .123.067 .196.06 .273-.021.076-.081.326-.352.415-.473.088-.122.171-.098.284-.052.113 .046.718 .37.841 .437.122 .066.205 .101.234 .154.029 .053.02 .302-.095.589-.115.286-.638.548-.868.56z"/> </svg> </a> </div> </div> <div itemprop="articleSection" content="Luonto" class="ydd-body-content ydd-body-content--article mb-64"> <p class="ydd-lead fnt-bold"> Vuoden 2100 sääennusteissa on luvassa tulvia, kuivuutta, rankkasateita ja ennätyshelteitä.</p> <p>Suomen ilmasto kokee ennennäkemättömän mullistuksen kuluvan vuosisadan aikana. Talvet lämpenevät ja lyhenevät, sademäärät kasvavat, kesät kuumenevat ja Itämeren pinta nousee.</p><p>Se, millainen ilmasto Suomessa on vuonna 2100 riippuu siitä, miten paljon päästöjä pystytään hillitsemään. Näissä ennusteissa oletetaan, että kasvihuonepäästöjä pystytään rajoittamaan kohtuullisesti. Vaikka ilmasto lämpenee, Suomen ilmastolle tyypillinen vuosien välinen vaihtelu säilyy, joten tulevaisuudessakin on odotettavissa myös tavallista viileämpiä kesiä ja kylmiä talvia. Ne kuitenkin harvinaistuvat ja tämän artikkelin kaltaiset sääkartat ovat hyvin mahdollisia vuonna 2100.</p><h2 class="ydd-heading-large">Marraskuu vuonna 2100: "Sateiden yhteydessä tehtiin uusi marraskuun sade-ennätys"</h2><div class="ydd-areena-player-wrapper ydd-areena-player-wrapper--available"> <div class="ydd-areena-player js-ydd-areena-player relative mb-8 mt-32 ydd-fluid-aspect-ratio-placeholder" data-aspect-ratio="16:9" data-player-props="{"id":"1-51014211","language":"fin","autoplay":true,"seek":0,"verticalVideo":false}"> <div itemprop="image" itemscope="" itemtype="https://schema.org/ImageObject" class="ydd-image relative"> <figure role="group"> <img alt="" itemprop="image" content="https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_1920,h_1080,c_fill,g_faces/w_700/v1637587679/13-1-51014211-1637587678576.jpg" data-base-url="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/" data-yle-id="13-1-51014211-1637587678576" data-crop-coords="w_1920,h_1080,c_fill,g_faces" data-image-width="1920" data-image-height="1080" data-image-version="1637587679" class="ydd-image__image js-ydd-image lazyload" src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1920 1080'%3E%3Crect width='100%' height='100%' fill='transparent' /%3E%3C/svg%3E" data-src="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_1920,h_1080,c_fill,g_faces/w_400/v1637587679/13-1-51014211-1637587678576.jpg" width="1920" height="1080"/> <meta itemprop="url" content="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_1920,h_1080,c_fill,g_faces/w_700/v1637587679/13-1-51014211-1637587678576.jpg"/> <noscript class="absolute inset-0"><img class="ydd-image__image" src="https://web.archive.org/web/20211127184210im_/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_1920,h_1080,c_fill,g_faces/w_400/v1637587679/13-1-51014211-1637587678576.jpg" alt=""/></noscript> </figure> </div> <div class="icon icon--overlay icon--play js-ydd-areena-play-icon"></div> </div> <div class="clr-F fnt-bold mb-32 txt-13"> <a href="https://web.archive.org/web/20211127184210/https://areena.yle.fi/1-51014211"> Sääennuste marraskuulle 2100 - Toista Yle Areenassa</a> </div> </div><p>Vuonna 2100 syksy on sateinen ja pimeä. Aurinko piilottelee paksun pilvipeitteen takana ja lunta on turha odotella ainakaan vielä marraskuussa. Lämpötila pysyttelee nollan ja kymmenen asteen välillä. Lapissa pysyvä lumipeite saadaan todennäköisesti vasta joulukuussa ja eteläisessä Suomessa sitä tuskin tulee koko talvena. Loka-marraskuussa alkaa pitkä valoton kausi, joka voi kestää jopa maaliskuulle asti.</p><div class="ydd-article-image ydd-article-image--normal mb-32 ml-12 mr-12 mt-32 relative"> <div class="relative"> <div itemprop="image" itemscope="" itemtype="https://schema.org/ImageObject" class="ydd-image relative"> <figure role="group"> <img alt="Autoja pysähtyneenä Jyväskylän Rantaväylällä Satamakadun risteyksessä. Vesisateinen lokakuinen sää." itemprop="image" content="https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_4096,h_2304,c_crop,x_151,y_0/w_700/v1634709629/39-869179616faf3e886b4.jpg" data-base-url="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/" data-yle-id="39-869179616faf3e886b4" data-crop-coords="w_4096,h_2304,c_crop,x_151,y_0" data-image-width="4096" data-image-height="2304" data-image-version="1634709629" data-copyright="Heli Kaski / Yle" data-caption="Vuonna 2100 "marraskuu" kestää neljä kuukautta. Marras-helmikuu on sateinen ja pilvinen, aurinkoa ei juuri näy. Lumettomuus pahentaa pimeyttä ja rankkasateiden määrä kasvaa." data-ydd-modal-src="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_88/w_4096,h_2304,c_crop,x_151,y_0/w_4096/w_1400,h_1400,c_fit/v1634709629/39-869179616faf3e886b4.jpg" data-ydd-modal-width="1400" data-ydd-modal-height="788" class="ydd-image__image js-ydd-image lazyload" src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 4096 2304'%3E%3Cdefs%3E%3Cpattern id='blurhash' patternUnits='userSpaceOnUse' width='4096' height='2304'%3E%3Cimage href='data:image/webp;base64,UklGRk4AAABXRUJQVlA4IEIAAADQAQCdASoQAAgAAUAmJQBOgBnfn8zyAAD+6kltdQs4eGa/qyXK5pvLM/THdf1IkoBNtcl9Ky9/GItrP3+2a54gAAA=' x='0' y='0' width='100%25' height='100%25' preserveAspectRatio='xMinYMin slice'%3E%3C/image%3E%3C/pattern%3E%3C/defs%3E%3Crect width='100%25' height='100%25' fill='url(%23blurhash)' /%3E%3C/svg%3E" width="4096" height="2304"/> <meta itemprop="url" content="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_4096,h_2304,c_crop,x_151,y_0/w_700/v1634709629/39-869179616faf3e886b4.jpg"/> <noscript class="absolute inset-0"><img class="ydd-image__image" src="https://web.archive.org/web/20211127184210im_/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_4096,h_2304,c_crop,x_151,y_0/w_400/v1634709629/39-869179616faf3e886b4.jpg" alt="Autoja pysähtyneenä Jyväskylän Rantaväylällä Satamakadun risteyksessä. Vesisateinen lokakuinen sää."/></noscript> <figcaption class="ydd-image__captions txt-13 pt-8"> <span class="visually-hidden">Kuvateksti</span> <span class="ydd-image__caption clr-F" itemprop="description">Vuonna 2100 "marraskuu" kestää neljä kuukautta. Marras-helmikuu on sateinen ja pilvinen, aurinkoa ei juuri näy. Lumettomuus pahentaa pimeyttä ja rankkasateiden määrä kasvaa.</span> <div class="ydd-image__copyright clr-C" itemprop="copyrightHolder">Kuva: Heli Kaski / Yle</div> </figcaption> </figure> </div> </div> </div><p>Vaikka myrskyjen ei ennusteta lisääntyvän tulevaisuudessa, tuulisuus lisääntyy ja yksittäiset myrskyt voivat voimistua. Erityisesti marraskuu on tuulinen, ja koska <a href="https://web.archive.org/web/20211127184210/https://ilmasto-opas.fi/fi/ilmastonmuutos/suomen-muuttuva-ilmasto/-/artikkeli/dfe1c8dc-1b3e-4072-9f86-7dc5b717e651/routakerros-ohenee.html">routa</a> ei enää suojaa puustoa samalla tavalla kuin aiemmin, tuuli aiheuttaa tuhoa metsissä.</p><p>Sateiden ja tuulien lisäksi voimakkaat matalapaineet aiheuttavat myös <a href="https://web.archive.org/web/20211127184210/https://yle.fi/uutiset/3-12121601">meritulvia</a>. Koska vuonna 2100 merenpinta on noussut Suomenlahdella jo 30 senttimetriä, etelärannikolla on varauduttava tulviin. Tulvat tunkeutuvat sisämaahan ja pahimmillaan merivesi voi nousta myrskyjen yhteydessä Haminan edustalla yli 2,5 metriä.</p><div class="ydd-article-image ydd-article-image--normal mb-32 ml-12 mr-12 mt-32 relative"> <div class="relative"> <div itemprop="image" itemscope="" itemtype="https://schema.org/ImageObject" class="ydd-image relative"> <figure role="group"> <img alt="Jätepaperipaalit koottiin tulvaesteiksi Helsingin Kauppatorille v. 2005" itemprop="image" content="https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_768,h_432,c_crop,x_0,y_115/w_700/v1504094876/39-42466459a6aa5c817bc.jpg" data-base-url="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/" data-yle-id="39-42466459a6aa5c817bc" data-crop-coords="w_768,h_432,c_crop,x_0,y_115" data-image-width="768" data-image-height="432" data-image-version="1504094876" data-copyright="Jaan Mentu, Helsingin Kaupunginmuseo" data-caption="Vuonna 2005 merivesi kasteli Helsingin kauppatorin, ja tulvan nousua yritettiin estää paperipaaleilla. Vuonna 2100 tulvat pahenevat ja yleistyvät ja Helsingin on ennen sitä keksittävä, miten se suojaa kaupungin tulvivalta mereltä." data-ydd-modal-src="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_88/w_768,h_432,c_crop,x_0,y_115/w_768/v1504094876/39-42466459a6aa5c817bc.jpg" data-ydd-modal-width="768" data-ydd-modal-height="432" class="ydd-image__image js-ydd-image lazyload" src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 768 432'%3E%3Cdefs%3E%3Cpattern id='blurhash' patternUnits='userSpaceOnUse' width='768' height='432'%3E%3Cimage href='data:image/webp;base64,UklGRk4AAABXRUJQVlA4IEIAAAAQAgCdASoQAAwAAUAmJZQCdH8AGBTBE6gAAP74C0gqVu+VgfkAfDqgA5ZM4DyQuf6lwH8+Bn2/QPZmfBRgJWNKwAA=' x='0' y='0' width='100%25' height='100%25' preserveAspectRatio='xMinYMin slice'%3E%3C/image%3E%3C/pattern%3E%3C/defs%3E%3Crect width='100%25' height='100%25' fill='url(%23blurhash)' /%3E%3C/svg%3E" width="768" height="432"/> <meta itemprop="url" content="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_768,h_432,c_crop,x_0,y_115/w_700/v1504094876/39-42466459a6aa5c817bc.jpg"/> <noscript class="absolute inset-0"><img class="ydd-image__image" src="https://web.archive.org/web/20211127184210im_/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_768,h_432,c_crop,x_0,y_115/w_400/v1504094876/39-42466459a6aa5c817bc.jpg" alt="Jätepaperipaalit koottiin tulvaesteiksi Helsingin Kauppatorille v. 2005"/></noscript> <figcaption class="ydd-image__captions txt-13 pt-8"> <span class="visually-hidden">Kuvateksti</span> <span class="ydd-image__caption clr-F" itemprop="description">Vuonna 2005 merivesi kasteli Helsingin kauppatorin, ja tulvan nousua yritettiin estää paperipaaleilla. Vuonna 2100 tulvat pahenevat ja yleistyvät ja Helsingin on ennen sitä keksittävä, miten se suojaa kaupungin tulvivalta mereltä.</span> <div class="ydd-image__copyright clr-C" itemprop="copyrightHolder">Kuva: Jaan Mentu, Helsingin Kaupunginmuseo</div> </figcaption> </figure> </div> </div> </div><h2 class="ydd-heading-large">Tammikuu vuonna 2100: "Eteläosassa terminen talvi ei ole edelleenkään alkanut"</h2><div class="ydd-areena-player-wrapper ydd-areena-player-wrapper--available"> <div class="ydd-areena-player js-ydd-areena-player relative mb-8 mt-32 ydd-fluid-aspect-ratio-placeholder" data-aspect-ratio="16:9" data-player-props="{"id":"1-51014218","language":"fin","autoplay":true,"seek":0,"verticalVideo":false}"> <div itemprop="image" itemscope="" itemtype="https://schema.org/ImageObject" class="ydd-image relative"> <figure role="group"> <img alt="" itemprop="image" content="https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_1920,h_1080,c_fill,g_faces/w_700/v1637587207/13-1-51014218-1637587206267.jpg" data-base-url="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/" data-yle-id="13-1-51014218-1637587206267" data-crop-coords="w_1920,h_1080,c_fill,g_faces" data-image-width="1920" data-image-height="1080" data-image-version="1637587207" class="ydd-image__image js-ydd-image lazyload" src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1920 1080'%3E%3Crect width='100%' height='100%' fill='transparent' /%3E%3C/svg%3E" data-src="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_1920,h_1080,c_fill,g_faces/w_400/v1637587207/13-1-51014218-1637587206267.jpg" width="1920" height="1080"/> <meta itemprop="url" content="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_1920,h_1080,c_fill,g_faces/w_700/v1637587207/13-1-51014218-1637587206267.jpg"/> <noscript class="absolute inset-0"><img class="ydd-image__image" src="https://web.archive.org/web/20211127184210im_/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_1920,h_1080,c_fill,g_faces/w_400/v1637587207/13-1-51014218-1637587206267.jpg" alt=""/></noscript> </figure> </div> <div class="icon icon--overlay icon--play js-ydd-areena-play-icon"></div> </div> <div class="clr-F fnt-bold mb-32 txt-13"> <a href="https://web.archive.org/web/20211127184210/https://areena.yle.fi/1-51014218"> Sääennuste tammikuulle 2100 - Toista Yle Areenassa</a> </div> </div><p>Ilmaston lämpenemisen huomaa hyvin talvisin. Jo nyt <a href="https://web.archive.org/web/20211127184210/https://www.ilmatieteenlaitos.fi/termiset-vuodenajat">termisen talven</a> pituus on lyhentynyt useilla viikoilla, eikä eteläiseen Suomeen saada lunta joka vuosi kuin ajoittain. Vuonna 2100 talvi on pimeämpi kuin nykyään, sillä aurinko näyttäytyy harvoin, pilvisyys on runsasta ja joulu-helmikuun aikana sadepäiviä on 25 prosenttia enemmän kuin nykyään. Sateet ovat myös entistä rankempia.</p><p>Talvet lämpenevät kaksi kertaa enemmän kuin kesät. Vuonna 2100 Etelä-Suomessa mitataan tuskin koskaan yli -15 asteen pakkasia. Lapissakin pakkaspäivät ovat vähentyneet kolmanneksen vuoteen 2100 mennessä ja kovimmat pakkaset ovat leudontuneet. Lunta Lapissa vielä on, vaikka se tulee yhä myöhemmin.</p><p>Vuonna 2100 lumiaika on vähentynyt Lapissa kolmanneksen. Lumen määrässä se ei ole kuitenkaan näkynyt, sillä samaan aikaan sademäärät ovat kasvaneet. Kun Lapissa vuonna 2100 sataa lunta, sitä saattaa tulla kerralla hyvin paljon, sillä sademäärät kasvavat edelleen, ja kun lämpötilat ovat vielä pakkasen puolella, sade tulee lumena. Päivät, jolloin lunta tulee yli 25 cm ovat Lapissa vuonna 2100 yhtä yleisiä kuin nytkin.</p><div class="ydd-article-image ydd-article-image--normal mb-32 ml-12 mr-12 mt-32 relative"> <div class="relative"> <div itemprop="image" itemscope="" itemtype="https://schema.org/ImageObject" class="ydd-image relative"> <figure role="group"> <img alt="Näkymä sateista Pohjoisesplanadia pitkin itään, Katajanokan suuntaan." itemprop="image" content="https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_4822,h_2712,c_crop,x_305,y_648/w_700/v1581506291/39-6417395e43dd8094097.jpg" data-base-url="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/" data-yle-id="39-6417395e43dd8094097" data-crop-coords="w_4822,h_2712,c_crop,x_305,y_648" data-image-width="4822" data-image-height="2712" data-image-version="1581506291" data-copyright="Eleni Paspatis / Yle" data-caption="Eteläisessä Suomessa talvet ovat tulevaisuudessa yhä useammin lumettomia eikä termistä talvea saada välttämättä lainkaan." data-ydd-modal-src="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_88/w_4822,h_2712,c_crop,x_305,y_648/w_4822/w_1400,h_1400,c_fit/v1581506291/39-6417395e43dd8094097.jpg" data-ydd-modal-width="1400" data-ydd-modal-height="788" class="ydd-image__image js-ydd-image lazyload" src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 4822 2712'%3E%3Cdefs%3E%3Cpattern id='blurhash' patternUnits='userSpaceOnUse' width='4822' height='2712'%3E%3Cimage href='data:image/webp;base64,UklGRkYAAABXRUJQVlA4IDoAAADQAQCdASoQAAsAAUAmJZwCdAELX5Ez0AD+m8fw5efvMSc+2XQxoep+PfiHhV264llZEEVJ+bDh3+AA' x='0' y='0' width='100%25' height='100%25' preserveAspectRatio='xMinYMin slice'%3E%3C/image%3E%3C/pattern%3E%3C/defs%3E%3Crect width='100%25' height='100%25' fill='url(%23blurhash)' /%3E%3C/svg%3E" width="4822" height="2712"/> <meta itemprop="url" content="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_4822,h_2712,c_crop,x_305,y_648/w_700/v1581506291/39-6417395e43dd8094097.jpg"/> <noscript class="absolute inset-0"><img class="ydd-image__image" src="https://web.archive.org/web/20211127184210im_/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_4822,h_2712,c_crop,x_305,y_648/w_400/v1581506291/39-6417395e43dd8094097.jpg" alt="Näkymä sateista Pohjoisesplanadia pitkin itään, Katajanokan suuntaan."/></noscript> <figcaption class="ydd-image__captions txt-13 pt-8"> <span class="visually-hidden">Kuvateksti</span> <span class="ydd-image__caption clr-F" itemprop="description">Eteläisessä Suomessa talvet ovat tulevaisuudessa yhä useammin lumettomia eikä termistä talvea saada välttämättä lainkaan.</span> <div class="ydd-image__copyright clr-C" itemprop="copyrightHolder">Kuva: Eleni Paspatis / Yle</div> </figcaption> </figure> </div> </div> </div><p>Hiihtämään pääsee Lapissa siis tulevaisuudessakin, mutta metsille painavat lumimassat ovat kurjempi juttu. Vuonna 2100 Lapin metsissä on nimittäin tapahtunut muutoksia: euroopankuusi on vienyt tilaa kapeammalta siperiankuuselta, joka on sopeutunut pohjoisen oloihin. Koska Perämeri on yhä pidempää jäätön, <a href="https://web.archive.org/web/20211127184210/https://www.ilmatieteenlaitos.fi/tykky-eli-tykkylumi">tykkylumikuormat</a> lisääntyvät. Puu voi saada kannateltavakseen satojen tai jopa tuhansien kilojen painoisen lastin lunta, ja siihen leveämpi euroopankuusi ei ole tottunut. Vaurioituneet metsät ovat myös ilmaston lämpenemisen myötä lisääntyneiden tuhohyönteisten mieleen.</p><div class="ydd-article-image ydd-article-image--normal mb-32 ml-12 mr-12 mt-32 relative"> <div class="relative"> <div itemprop="image" itemscope="" itemtype="https://schema.org/ImageObject" class="ydd-image relative"> <figure role="group"> <img alt="Upplega på träd vid Luosto-fjället i Lappland." itemprop="image" content="https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_1600,h_900,c_crop,x_0,y_93/w_700/v1457778340/14-svyle-27734656e3ee3c72e3e.jpg" data-base-url="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/" data-yle-id="14-svyle-27734656e3ee3c72e3e" data-crop-coords="w_1600,h_900,c_crop,x_0,y_93" data-image-width="1600" data-image-height="900" data-image-version="1457778340" data-copyright="Vesa Vaarama / Yle" data-caption="Lapissa on vuonna 2100 lumiaika on lyhentynyt, mutta lunta on vielä luvassa. " data-ydd-modal-src="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_88/w_1600,h_900,c_crop,x_0,y_93/w_1600/w_1400,h_1400,c_fit/v1457778340/14-svyle-27734656e3ee3c72e3e.jpg" data-ydd-modal-width="1400" data-ydd-modal-height="788" class="ydd-image__image js-ydd-image lazyload" src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1600 900'%3E%3Cdefs%3E%3Cpattern id='blurhash' patternUnits='userSpaceOnUse' width='1600' height='900'%3E%3Cimage href='data:image/webp;base64,UklGRk4AAABXRUJQVlA4IEIAAACwAQCdASoQAAsAAUAmJQBOgB3XJt/wAP7WscaavmCceOkUV7o6X28qbL6yJA0WzTpYYzfyj7QOevqb57FUcpYvAAA=' x='0' y='0' width='100%25' height='100%25' preserveAspectRatio='xMinYMin slice'%3E%3C/image%3E%3C/pattern%3E%3C/defs%3E%3Crect width='100%25' height='100%25' fill='url(%23blurhash)' /%3E%3C/svg%3E" width="1600" height="900"/> <meta itemprop="url" content="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_1600,h_900,c_crop,x_0,y_93/w_700/v1457778340/14-svyle-27734656e3ee3c72e3e.jpg"/> <noscript class="absolute inset-0"><img class="ydd-image__image" src="https://web.archive.org/web/20211127184210im_/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_1600,h_900,c_crop,x_0,y_93/w_400/v1457778340/14-svyle-27734656e3ee3c72e3e.jpg" alt="Upplega på träd vid Luosto-fjället i Lappland."/></noscript> <figcaption class="ydd-image__captions txt-13 pt-8"> <span class="visually-hidden">Kuvateksti</span> <span class="ydd-image__caption clr-F" itemprop="description">Lapissa on vuonna 2100 lumiaika on lyhentynyt, mutta lunta on vielä luvassa. </span> <div class="ydd-image__copyright clr-C" itemprop="copyrightHolder">Kuva: Vesa Vaarama / Yle</div> </figcaption> </figure> </div> </div> </div><p>Etelämpänä rankat sateet aiheuttavat tulvia syksyisin ja talvisin. Talven valunta kaksinkertaistuu suuressa osassa Suomea. Maa, joet ja järvet eivät pysty imemään kaikkea vettä. <a href="https://web.archive.org/web/20211127184210/https://yle.fi/uutiset/3-12112542">Tulvien</a> yksi suuri ongelma on niiden ennakoimattomuus: kun ennen tulvia kehittyi lähinnä keväisin, nyt niitä voi tulla mihin aikaan vuodesta tahansa. Kevättulvat tulevat itse asiassa vähenemään, sillä lumien sulamisvesiä ei enää ole, paitsi Lapissa.</p><h2 class="ydd-heading-large">Huhtikuu vuonna 2100: "Ensimmäinen hellepäivä on mitattu jo tänään"</h2><div class="ydd-areena-player-wrapper ydd-areena-player-wrapper--available"> <div class="ydd-areena-player js-ydd-areena-player relative mb-8 mt-32 ydd-fluid-aspect-ratio-placeholder" data-aspect-ratio="16:9" data-player-props="{"id":"1-51014220","language":"fin","autoplay":true,"seek":0,"verticalVideo":false}"> <div itemprop="image" itemscope="" itemtype="https://schema.org/ImageObject" class="ydd-image relative"> <figure role="group"> <img alt="" itemprop="image" content="https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_1920,h_1080,c_fill,g_faces/w_700/v1637582390/13-1-51014220-1637582389806.jpg" data-base-url="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/" data-yle-id="13-1-51014220-1637582389806" data-crop-coords="w_1920,h_1080,c_fill,g_faces" data-image-width="1920" data-image-height="1080" data-image-version="1637582390" class="ydd-image__image js-ydd-image lazyload" src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1920 1080'%3E%3Crect width='100%' height='100%' fill='transparent' /%3E%3C/svg%3E" data-src="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_1920,h_1080,c_fill,g_faces/w_400/v1637582390/13-1-51014220-1637582389806.jpg" width="1920" height="1080"/> <meta itemprop="url" content="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_1920,h_1080,c_fill,g_faces/w_700/v1637582390/13-1-51014220-1637582389806.jpg"/> <noscript class="absolute inset-0"><img class="ydd-image__image" src="https://web.archive.org/web/20211127184210im_/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_1920,h_1080,c_fill,g_faces/w_400/v1637582390/13-1-51014220-1637582389806.jpg" alt=""/></noscript> </figure> </div> <div class="icon icon--overlay icon--play js-ydd-areena-play-icon"></div> </div> <div class="clr-F fnt-bold mb-32 txt-13"> <a href="https://web.archive.org/web/20211127184210/https://areena.yle.fi/1-51014220"> Sääennuste huhtikuulle 2100 - Toista Yle Areenassa</a> </div> </div><p>Vuonna 2100 kevät saapuu varhain. Sää on aurinkoinen ja lumet häviävät hetkessä. Kasvukausi on pidentynyt Suomessa paikoin jopa kolme kuukautta, ja jos liika kuivuus tai halla eivät pilaa viljelmiä, vappuna saadaan jo uusia perunoita.</p><p>Suomen kevät vuonna 2100 on hyvin erinäköinen pohjoisessa ja etelässä. Lapissa lumien sulamisvedet voivat vielä aiheuttaa tulvia, mutta maan etelä- ja keskiosassa aurinko kuivattaa maan nopeasti. Pohjoisessa kuivuusongelma alkaa toukokuun jälkeen, mutta siellä kuivuus ei äidy niin pahaksi myöhään sulavan lumen ja lyhyen, sateisen kesän ansiosta. Nykyään ankaraa kuivuutta esiintyy keväisin kerran kymmenessä vuodessa, mutta vuosisadan lopulla ankaraa kuivuutta voi olla lähes joka kolmas vuosi.</p><div class="ydd-article-image ydd-article-image--normal mb-32 ml-12 mr-12 mt-32 relative"> <div class="relative"> <div itemprop="image" itemscope="" itemtype="https://schema.org/ImageObject" class="ydd-image relative"> <figure role="group"> <img alt="Jussi Uutela ja Heimo Flinck" itemprop="image" content="https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_5472,h_3078,c_crop,x_0,y_282/w_700/v1591179814/39-6836195ed50c54689a4.jpg" data-base-url="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/" data-yle-id="39-6836195ed50c54689a4" data-crop-coords="w_5472,h_3078,c_crop,x_0,y_282" data-image-width="5472" data-image-height="3078" data-image-version="1591179814" data-copyright="Annu Passoja / Yle" data-caption="Kevättulvien riski pienenee, sillä lumen sulamisvesiä ei enää ole niin paljon. Lapissa joinakin vuosina saattaa edelleen olla runsaslumisia talvia, jolloin keväällä on varauduttava tulviin. Samaan aikaan etelässä voi olla rutikuivaa." data-ydd-modal-src="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_88/w_5472,h_3078,c_crop,x_0,y_282/w_5472/w_1400,h_1400,c_fit/v1591179814/39-6836195ed50c54689a4.jpg" data-ydd-modal-width="1400" data-ydd-modal-height="788" class="ydd-image__image js-ydd-image lazyload" src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 5472 3078'%3E%3Cdefs%3E%3Cpattern id='blurhash' patternUnits='userSpaceOnUse' width='5472' height='3078'%3E%3Cimage href='data:image/webp;base64,UklGRkoAAABXRUJQVlA4ID4AAADQAQCdASoQAAsAAUAmJQBOgCElNyqzCAD+4SKbnPefo+BXut6711iA5G1oPxZzh9OHyj1E0iaPHA7fJPgAAA==' x='0' y='0' width='100%25' height='100%25' preserveAspectRatio='xMinYMin slice'%3E%3C/image%3E%3C/pattern%3E%3C/defs%3E%3Crect width='100%25' height='100%25' fill='url(%23blurhash)' /%3E%3C/svg%3E" width="5472" height="3078"/> <meta itemprop="url" content="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_5472,h_3078,c_crop,x_0,y_282/w_700/v1591179814/39-6836195ed50c54689a4.jpg"/> <noscript class="absolute inset-0"><img class="ydd-image__image" src="https://web.archive.org/web/20211127184210im_/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_5472,h_3078,c_crop,x_0,y_282/w_400/v1591179814/39-6836195ed50c54689a4.jpg" alt="Jussi Uutela ja Heimo Flinck"/></noscript> <figcaption class="ydd-image__captions txt-13 pt-8"> <span class="visually-hidden">Kuvateksti</span> <span class="ydd-image__caption clr-F" itemprop="description">Kevättulvien riski pienenee, sillä lumen sulamisvesiä ei enää ole niin paljon. Lapissa joinakin vuosina saattaa edelleen olla runsaslumisia talvia, jolloin keväällä on varauduttava tulviin. Samaan aikaan etelässä voi olla rutikuivaa.</span> <div class="ydd-image__copyright clr-C" itemprop="copyrightHolder">Kuva: Annu Passoja / Yle</div> </figcaption> </figure> </div> </div> </div><div class="ydd-article-image ydd-article-image--normal mb-32 ml-12 mr-12 mt-32 relative"> <div class="relative"> <div itemprop="image" itemscope="" itemtype="https://schema.org/ImageObject" class="ydd-image relative"> <figure role="group"> <img alt="Metsän kulotusta." itemprop="image" content="https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_3648,h_2052,c_crop,x_0,y_542/w_700/v1591956258/39-6889415ee3528b24e67.jpg" data-base-url="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/" data-yle-id="39-6889415ee3528b24e67" data-crop-coords="w_3648,h_2052,c_crop,x_0,y_542" data-image-width="3648" data-image-height="2052" data-image-version="1591956258" data-copyright="Keski-Suomen pelastuslaitos" data-caption="Keväällä on vuonna 2100 kuivaa. Ruohikko ja metsäpalojen vaara on kasvanut erityisesti Etelä- ja Länsi-Suomessa." data-ydd-modal-src="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_88/w_3648,h_2052,c_crop,x_0,y_542/w_3648/w_1400,h_1400,c_fit/v1591956258/39-6889415ee3528b24e67.jpg" data-ydd-modal-width="1400" data-ydd-modal-height="788" class="ydd-image__image js-ydd-image lazyload" src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 3648 2052'%3E%3Cdefs%3E%3Cpattern id='blurhash' patternUnits='userSpaceOnUse' width='3648' height='2052'%3E%3Cimage href='data:image/webp;base64,UklGRkwAAABXRUJQVlA4IEAAAADwAQCdASoQAAwAAUAmJYgCdAELSpJBjgAA/vYxAEvCGkxnpq9rQ93WuVt34oc0t8QI+o/gFTNe79yNMXhhcAAA' x='0' y='0' width='100%25' height='100%25' preserveAspectRatio='xMinYMin slice'%3E%3C/image%3E%3C/pattern%3E%3C/defs%3E%3Crect width='100%25' height='100%25' fill='url(%23blurhash)' /%3E%3C/svg%3E" width="3648" height="2052"/> <meta itemprop="url" content="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_3648,h_2052,c_crop,x_0,y_542/w_700/v1591956258/39-6889415ee3528b24e67.jpg"/> <noscript class="absolute inset-0"><img class="ydd-image__image" src="https://web.archive.org/web/20211127184210im_/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_3648,h_2052,c_crop,x_0,y_542/w_400/v1591956258/39-6889415ee3528b24e67.jpg" alt="Metsän kulotusta."/></noscript> <figcaption class="ydd-image__captions txt-13 pt-8"> <span class="visually-hidden">Kuvateksti</span> <span class="ydd-image__caption clr-F" itemprop="description">Keväällä on vuonna 2100 kuivaa. Ruohikko ja metsäpalojen vaara on kasvanut erityisesti Etelä- ja Länsi-Suomessa.</span> <div class="ydd-image__copyright clr-C" itemprop="copyrightHolder">Kuva: Keski-Suomen pelastuslaitos</div> </figcaption> </figure> </div> </div> </div><p>Kevät ei ole helppoa aikaa siitepölyallergikoille. Koska lehtipuut ovat vallanneet alaa etelän metsissä, siitepölyä on ilmassa enemmän. Koska kevät on aikaistunut, myös sen tuotanto on alkanut aikaisemmin. Samoin siitepölyn kaukokulkeumia saadaan entistä aiemmin, joten siitepölykausi voi kestää jopa kahdeksan kuukautta. Pujon, koivun, heinien, lepän ja pähkinäpensaan lisäksi tulevaisuudessa allergiaoireita lisäävät uudet lajit, kuten pujon sukulaiset tuoksukit.</p><h2 class="ydd-heading-large">Heinäkuu vuonna 2100: "Metsäpalovaara on korkea koko maassa pitkään jatkuneen kuivuuden vuoksi"</h2><div class="ydd-areena-player-wrapper ydd-areena-player-wrapper--available"> <div class="ydd-areena-player js-ydd-areena-player relative mb-8 mt-32 ydd-fluid-aspect-ratio-placeholder" data-aspect-ratio="16:9" data-player-props="{"id":"1-51014213","language":"fin","autoplay":true,"seek":0,"verticalVideo":false}"> <div itemprop="image" itemscope="" itemtype="https://schema.org/ImageObject" class="ydd-image relative"> <figure role="group"> <img alt="" itemprop="image" content="https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_1920,h_1080,c_fill,g_faces/w_700/v1637587288/13-1-51014213-1637587287530.jpg" data-base-url="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/" data-yle-id="13-1-51014213-1637587287530" data-crop-coords="w_1920,h_1080,c_fill,g_faces" data-image-width="1920" data-image-height="1080" data-image-version="1637587288" class="ydd-image__image js-ydd-image lazyload" src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1920 1080'%3E%3Crect width='100%' height='100%' fill='transparent' /%3E%3C/svg%3E" data-src="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_1920,h_1080,c_fill,g_faces/w_400/v1637587288/13-1-51014213-1637587287530.jpg" width="1920" height="1080"/> <meta itemprop="url" content="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_1920,h_1080,c_fill,g_faces/w_700/v1637587288/13-1-51014213-1637587287530.jpg"/> <noscript class="absolute inset-0"><img class="ydd-image__image" src="https://web.archive.org/web/20211127184210im_/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_1920,h_1080,c_fill,g_faces/w_400/v1637587288/13-1-51014213-1637587287530.jpg" alt=""/></noscript> </figure> </div> <div class="icon icon--overlay icon--play js-ydd-areena-play-icon"></div> </div> <div class="clr-F fnt-bold mb-32 txt-13"> <a href="https://web.archive.org/web/20211127184210/https://areena.yle.fi/1-51014213"> Sääennuste heinäkuulle 2100 - Toista Yle Areenassa</a> </div> </div><p>Jos kasvihuonepäästöjä onnistutaan rajoittamaan kohtuullisesti, Suomen kesät kuumenevat keskimäärin noin 3 astetta. Hellepäivät eli yli 25 asteen päivät lisääntyvät jo pelkästään lämpötilannousun seurauksena, mutta helleputkia ja kuivuutta pahentaa myös se, että paikallaan pysyvät säätyypit yleistyvät. Ennen vuotta 2100 hellepäivät kolmin- tai nelinkertaistuvat Suomessa. Oikein kuumina jaksoina helpotusta ei saada edes öisin, sillä ilma ei ehdi viiletä lyhyenä kesäyönä, ja öistä tulee yhä useammin trooppisia eli lämpötila ei laske koko vuorokautena alle 20 asteen.</p><p>Vaikka kesällä ilmasto ei muutu niin radikaalisti kuin talvella, paikalleen juuttunut korkeapaine on todellinen ongelma ihmisille ja luonnolle. Helleputkia voi ilmetä milloin tahansa touko-syyskuussa ja pahimmillaan ne ovat heinä-elokuussa. Yli 30 asteen lämpötiloja mitataan kymmenen kertaa useammin kuin nykyään, ja vuonna 2100 Suomessa on jo nähty yli 40 asteen hellepäiviä.</p><div class="ydd-article-image ydd-article-image--normal mb-32 ml-12 mr-12 mt-32 relative"> <div class="relative"> <div itemprop="image" itemscope="" itemtype="https://schema.org/ImageObject" class="ydd-image relative"> <figure role="group"> <img alt="Barn badar i fontän i Moskva." itemprop="image" content="https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_2276,h_1280,c_crop,x_0,y_121/w_700/v1561351701/39-5726085d1055f408694.jpg" data-base-url="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/" data-yle-id="39-5726085d1055f408694" data-crop-coords="w_2276,h_1280,c_crop,x_0,y_121" data-image-width="2276" data-image-height="1280" data-image-version="1561351701" data-copyright="All Over Press" data-caption="Kesäisin kuumuus koettelee erityisesti kaupungeissa, joissa kuumuus nousee muita alueita tukalammaksi. Vuonna 2100 on nähty jo yli 40 asteen hellepäiviä. Myös yöt ovat trooppisia." data-ydd-modal-src="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_88/w_2276,h_1280,c_crop,x_0,y_121/w_2276/w_1400,h_1400,c_fit/v1561351701/39-5726085d1055f408694.jpg" data-ydd-modal-width="1400" data-ydd-modal-height="788" class="ydd-image__image js-ydd-image lazyload" src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 2276 1280'%3E%3Cdefs%3E%3Cpattern id='blurhash' patternUnits='userSpaceOnUse' width='2276' height='1280'%3E%3Cimage href='data:image/webp;base64,UklGRk4AAABXRUJQVlA4IEIAAADQAQCdASoQAAsAAUAmJZwCdAD1GD9UQAD+4fHz89P/N1M3MJLTq8+TSNZ7mwSyeuBgXRBYBm00VvFpf0oaLMtqpAA=' x='0' y='0' width='100%25' height='100%25' preserveAspectRatio='xMinYMin slice'%3E%3C/image%3E%3C/pattern%3E%3C/defs%3E%3Crect width='100%25' height='100%25' fill='url(%23blurhash)' /%3E%3C/svg%3E" width="2276" height="1280"/> <meta itemprop="url" content="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_2276,h_1280,c_crop,x_0,y_121/w_700/v1561351701/39-5726085d1055f408694.jpg"/> <noscript class="absolute inset-0"><img class="ydd-image__image" src="https://web.archive.org/web/20211127184210im_/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_2276,h_1280,c_crop,x_0,y_121/w_400/v1561351701/39-5726085d1055f408694.jpg" alt="Barn badar i fontän i Moskva."/></noscript> <figcaption class="ydd-image__captions txt-13 pt-8"> <span class="visually-hidden">Kuvateksti</span> <span class="ydd-image__caption clr-F" itemprop="description">Kesäisin kuumuus koettelee erityisesti kaupungeissa, joissa kuumuus nousee muita alueita tukalammaksi. Vuonna 2100 on nähty jo yli 40 asteen hellepäiviä. Myös yöt ovat trooppisia.</span> <div class="ydd-image__copyright clr-C" itemprop="copyrightHolder">Kuva: All Over Press</div> </figcaption> </figure> </div> </div> </div><p>Vuonna 2100 päivät, jolloin on maastopalovaroitus ovat lisääntyneet 30 prosenttia. Luonto kuivuu ja tuulet lisäävät palojen leviämistä. Korventunutta kotipihaa tekisi mieli kastella, mutta pohjavesi on vähissä. On hyvin mahdollista, että loppukesästä vedenkäyttöä joudutaan säännöstelemään huonon pohjavesitilanteen vuoksi.</p><p>Helle lisää myös<a href="https://web.archive.org/web/20211127184210/https://www.ilmatieteenlaitos.fi/aarilampotilojen-terveysvaikutuksia"> kuolleisuutta nopeast</a>i. Erityisen vaarallista se on perussairaille ja vanhuksille, joiden kuolleisuus lisääntyy merkittävästi pitkittyneiden helteiden aikana. <a href="https://web.archive.org/web/20211127184210/https://ilmasto-opas.fi/fi/ilmastonmuutos/sopeutuminen/-/artikkeli/ce71e82c-24a4-4566-985a-8955d12b717c/lamposaarekeilmion-ymmartaminen-tukee-kaupunkisuunnittelua.html">Lämpösaarekeilmiön</a> vuoksi kaupungeissa saattaa olla yli kymmenen astetta kuumempaa kuin sitä ympäröivillä alueilla. Mereen tai järveenkään ei tee mieli pulahtaa, sillä lisääntynyt ravinnekuorma ja paahtava helle ovat saaneet sinilevät kukoistamaan.</p><div class="ydd-article-image ydd-article-image--normal mb-32 ml-12 mr-12 mt-32 relative"> <div class="relative"> <div itemprop="image" itemscope="" itemtype="https://schema.org/ImageObject" class="ydd-image relative"> <figure role="group"> <img alt="Markbrandsbekämpning pågår." itemprop="image" content="https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_6000,h_3375,c_crop,x_0,y_487/w_700/v1590504227/39-6812765ecd2afd1bc59.jpg" data-base-url="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/" data-yle-id="39-6812765ecd2afd1bc59" data-crop-coords="w_6000,h_3375,c_crop,x_0,y_487" data-image-width="6000" data-image-height="3375" data-image-version="1590504227" data-copyright="Yle/Mikael Kokkola" data-caption="Paikalleen juuttuneet korkeapaineet aiheuttavat kesäisin pitkiä helleputkia, jolloin luonto ja eläimet ovat koetuksella. Metsä- ja ruohikkopalojen vaara kasvaa. " data-ydd-modal-src="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_88/w_6000,h_3375,c_crop,x_0,y_487/w_6000/w_1400,h_1400,c_fit/v1590504227/39-6812765ecd2afd1bc59.jpg" data-ydd-modal-width="1400" data-ydd-modal-height="788" class="ydd-image__image js-ydd-image lazyload" src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 6000 3375'%3E%3Cdefs%3E%3Cpattern id='blurhash' patternUnits='userSpaceOnUse' width='6000' height='3375'%3E%3Cimage href='data:image/webp;base64,UklGRkoAAABXRUJQVlA4ID4AAADQAQCdASoQAAsAAUAmJQBOgCHcN862bgD+/ppzOTsxOS+1FXfDqd/bcxmREfxO3QFKCrXKmMaqaMgS7QAAAA==' x='0' y='0' width='100%25' height='100%25' preserveAspectRatio='xMinYMin slice'%3E%3C/image%3E%3C/pattern%3E%3C/defs%3E%3Crect width='100%25' height='100%25' fill='url(%23blurhash)' /%3E%3C/svg%3E" width="6000" height="3375"/> <meta itemprop="url" content="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_6000,h_3375,c_crop,x_0,y_487/w_700/v1590504227/39-6812765ecd2afd1bc59.jpg"/> <noscript class="absolute inset-0"><img class="ydd-image__image" src="https://web.archive.org/web/20211127184210im_/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_6000,h_3375,c_crop,x_0,y_487/w_400/v1590504227/39-6812765ecd2afd1bc59.jpg" alt="Markbrandsbekämpning pågår."/></noscript> <figcaption class="ydd-image__captions txt-13 pt-8"> <span class="visually-hidden">Kuvateksti</span> <span class="ydd-image__caption clr-F" itemprop="description">Paikalleen juuttuneet korkeapaineet aiheuttavat kesäisin pitkiä helleputkia, jolloin luonto ja eläimet ovat koetuksella. Metsä- ja ruohikkopalojen vaara kasvaa. </span> <div class="ydd-image__copyright clr-C" itemprop="copyrightHolder">Kuva: Yle/Mikael Kokkola</div> </figcaption> </figure> </div> </div> </div><p>Kun helteet vihdoin hellittävät, luvassa on voimakkaita rankkasateita ja ukkosia. Vaikka keskimääräinen sademäärä ei muutu kesäisin yhtä paljon kuin talvella, rankkasateiden arvioidaan voimistuvan. Hyvin voimakkaiden, yli 30 mm vuorokaudessa vettä tuovien sateiden ennustetaan lisääntyvät puolella nykyiseen verrattuna vuoteen 2100 mennessä. Kun hellejakson päälle saadaan tällainen kuuro, rutikuiva maa ei pystykään imemään kaipaamaansa vettä. Kaupungit lainehtivat, ja ellei hulevesiä ehditä käsitellä, epäpuhtauksia voi päätyä luontoon ja pohjaveteen.</p><p>Ukkospuuskien ohella lisääntyvät myös äärimmäiset ilmiöt, kuten syöksyvirtaukset ja trombit. Ne ovat kuitenkin edelleen hyvin harvinaisia myös vuonna 2100.</p><div class="ydd-article-image ydd-article-image--normal mb-32 ml-12 mr-12 mt-32 relative"> <div class="relative"> <div itemprop="image" itemscope="" itemtype="https://schema.org/ImageObject" class="ydd-image relative"> <figure role="group"> <img alt="Auto ajaa lainehtivalla Kuopion Satamakadulla rankkasateen jälkeen." itemprop="image" content="https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_4032,h_2268,c_crop,x_0,y_378/w_700/v1624456063/39-82487160d33b37e31cb.jpg" data-base-url="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/" data-yle-id="39-82487160d33b37e31cb" data-crop-coords="w_4032,h_2268,c_crop,x_0,y_378" data-image-width="4032" data-image-height="2268" data-image-version="1624456063" data-copyright="Markku Malinen / Yle" data-caption="Rankkasateiden voimistuessa ilmastonmuutoksen seurauksena hulevesitulvien riski suurenee." data-ydd-modal-src="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_88/w_4032,h_2268,c_crop,x_0,y_378/w_4032/w_1400,h_1400,c_fit/v1624456063/39-82487160d33b37e31cb.jpg" data-ydd-modal-width="1400" data-ydd-modal-height="788" class="ydd-image__image js-ydd-image lazyload" src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 4032 2268'%3E%3Cdefs%3E%3Cpattern id='blurhash' patternUnits='userSpaceOnUse' width='4032' height='2268'%3E%3Cimage href='data:image/webp;base64,UklGRjgAAABXRUJQVlA4ICwAAADQAQCdASoQAAwAAUAmJZQCdADRBhe4oAD8f4zofu5ntnkUkLC2KaiNnCcAAA==' x='0' y='0' width='100%25' height='100%25' preserveAspectRatio='xMinYMin slice'%3E%3C/image%3E%3C/pattern%3E%3C/defs%3E%3Crect width='100%25' height='100%25' fill='url(%23blurhash)' /%3E%3C/svg%3E" width="4032" height="2268"/> <meta itemprop="url" content="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_4032,h_2268,c_crop,x_0,y_378/w_700/v1624456063/39-82487160d33b37e31cb.jpg"/> <noscript class="absolute inset-0"><img class="ydd-image__image" src="https://web.archive.org/web/20211127184210im_/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_4032,h_2268,c_crop,x_0,y_378/w_400/v1624456063/39-82487160d33b37e31cb.jpg" alt="Auto ajaa lainehtivalla Kuopion Satamakadulla rankkasateen jälkeen."/></noscript> <figcaption class="ydd-image__captions txt-13 pt-8"> <span class="visually-hidden">Kuvateksti</span> <span class="ydd-image__caption clr-F" itemprop="description">Rankkasateiden voimistuessa ilmastonmuutoksen seurauksena hulevesitulvien riski suurenee.</span> <div class="ydd-image__copyright clr-C" itemprop="copyrightHolder">Kuva: Markku Malinen / Yle</div> </figcaption> </figure> </div> </div> </div><p>Ilmaston lämpeneminen näkyy Suomen luonnossa jo nyt. <a href="https://web.archive.org/web/20211127184210/https://areena.yle.fi/audio/1-50933527">Kuuntele tarinoita muuttuneesta Suomesta Areenasta</a>!</p><p><em><strong>Ylen päivittyvästä seuranta-artikkelista pääset lukemaan tärkeimmät ilmastonmuutokseen ja sen hillintään liittyvät uutiset. Seuranta-artikkeliin pääset </strong></em><a href="https://web.archive.org/web/20211127184210/https://yle.fi/uutiset/3-12153612"><em><strong>tästä</strong></em></a><em><strong>. Artikkelin chat-välilehdellä voit myös esittää kysymyksiä ilmastonmuutokseen liittyen.</strong></em></p> </div> <div class="-ml-16 -mr-16"> <details class="ydd-article-tags__details mb-32 ml-16 mt-32"> <summary class="ydd-article-tags__summary cursor-pointer flex pb-16 pointer-events-none relative summary-reset user-select-none"> <div class="flex"> <div class="ydd-article-tags__pill bg-clr-H border-clr-B border-solid br flex items-center pointer-events-auto"> <span id="aria-article-tags" class="ydd-article-tags__pill-text clr-C truncate">Lisää aiheesta: <span aria-hidden="true" itemprop="keywords" content="ilmastonmuutos, sääennusteet, meteorologia">Ilmastonmuutos, Sääennusteet</span> </span> <span class="ydd-article-tags__toggle ml-8"></span> </div> </div> </summary> <div class="ydd-article-tags__content pl-8"> <ul class="ydd-article-tags__list break-word list-reset relative w-full" aria-labelledby="aria-article-tags"> <li class="ydd-article-tags__list-item mb-16 pl-16 relative"> <a class="ydd-article-tags__link clr-A" href="/web/20211127184210/https://yle.fi/aihe/t/18-217087">Ilmastonmuutos</a> </li> <li class="ydd-article-tags__list-item mb-16 pl-16 relative"> <a class="ydd-article-tags__link clr-A" href="/web/20211127184210/https://yle.fi/aihe/t/18-206186">Sääennusteet</a> </li> <li class="ydd-article-tags__list-item mb-16 pl-16 relative"> <a class="ydd-article-tags__link clr-A" href="/web/20211127184210/https://yle.fi/aihe/t/18-212156">Meteorologia</a> </li> </ul> </div> </details> <aside id="ydd-article-related-content"> <div class="ydd-articles-list mb-32"> <div class="border-4 border-b-solid border-clr-B deco-line-title mb-16 mt-8 pl-16 pr-16 w-full"> <div class="items-center flex justify-between"> <h2 class="fnt-bold txt-15 uppercase" id="aria-articles-list-related-content"> Luonto </h2> </div> </div> <ul aria-labelledby="aria-articles-list-related-content" class="list-reset"> <li class="ydd-articles-list__item block border-b-solid border-clr-B ml-16 mr-16 pb-16 pt-16"> <div class="ydd-articles-list__image mb-16"> <a class="block relative" href="https://web.archive.org/web/20211127184210/https://yle.fi/aihe/a/20-10001697" aria-hidden="true" tabindex="-1" data-analytics-context=""> <div itemprop="image" itemscope="" itemtype="https://schema.org/ImageObject" class="ydd-image relative"> <figure role="group"> <img alt="Orava on oksalla ja pitää etujalkojaan mahan päällä." itemprop="image" content="https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_3648,h_3648,c_crop,x_284,y_0/w_700/v1637660519/39-882690619cb71c9cf75.jpg" data-base-url="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/" data-yle-id="39-882690619cb71c9cf75" data-crop-coords="w_3648,h_3648,c_crop,x_284,y_0" data-image-width="3648" data-image-height="3648" data-image-version="1637660519" class="ydd-image__image js-ydd-image lazyload" src="data:image/svg+xml,%3Csvg 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src="https://web.archive.org/web/20211127184210im_/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/q_80/w_3648,h_3648,c_crop,x_284,y_0/w_400/v1637660519/39-882690619cb71c9cf75.jpg" alt="Orava on oksalla ja pitää etujalkojaan mahan päällä."/></noscript> </figure> </div> </a> </div> <div class="ydd-articles-list__content"> <a class="block focus-underline" href="https://web.archive.org/web/20211127184210/https://yle.fi/aihe/a/20-10001697"> <h3 class="fnt-bold break-word">Oravat ovat vähentyneet metsistämme – lue 10 yllättävää faktaa pörröhännästä!</h3> </a> <p class="txt-15 clr-E ml-0 ">Tiesitkö tämän oravasta?</p> <div class="flex items-center mt-0"> <span class="icon icon--time"></span> <span class="clr-C txt-13"> 24.11.2021 </span> </div> </div> </li> <li class="ydd-articles-list__item block border-b-solid border-clr-B ml-16 mr-16 pb-16 pt-16"> <div class="ydd-articles-list__image mb-16"> <a class="block relative" 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class="ydd-articles-list__content"> <a class="block focus-underline" href="https://web.archive.org/web/20211127184210/https://yle.fi/aihe/a/20-10001590"> <h3 class="fnt-bold break-word">Kristian Mäki-Jussila on Suomen kovimpia vapaasukeltajia – katso, miten hän sukeltaa 50 metrin syvyyteen ilman sukelluslaitteita</h3> </a> <p class="txt-15 clr-E ml-0 ">Tule mukaan syvyyksiin</p> <div class="flex items-center mt-0"> <span class="icon icon--time"></span> <span class="clr-C txt-13"> 21.11.2021 </span> </div> </div> </li> <li class="ydd-articles-list__item block border-b-solid border-clr-B ml-16 mr-16 pb-16 pt-16"> <div class="ydd-articles-list__image mb-16"> <a class="block relative" href="https://web.archive.org/web/20211127184210/https://yle.fi/aihe/a/20-10001666" aria-hidden="true" tabindex="-1" data-analytics-context=""> <div itemprop="image" itemscope="" itemtype="https://schema.org/ImageObject" class="ydd-image relative"> <figure role="group"> <img alt="piirroskuva ihmisistä erilaisissa tunnetiloissa" itemprop="image" content="https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/fl_keep_iptc/q_88/w_2581,h_2581,c_crop,x_1589,y_0/w_700/v1637073267/39-8803336193c1001641b.jpg" data-base-url="https://web.archive.org/web/20211127184210/https://images.cdn.yle.fi/image/upload/f_auto,fl_progressive/" data-yle-id="39-8803336193c1001641b" data-crop-coords="w_2581,h_2581,c_crop,x_1589,y_0" data-image-width="2581" data-image-height="2581" data-image-version="1637073267" class="ydd-image__image js-ydd-image lazyload" src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 2581 2581'%3E%3Cdefs%3E%3Cpattern id='blurhash' patternUnits='userSpaceOnUse' width='2581' height='2581'%3E%3Cimage href='data:image/webp;base64,UklGRk4AAABXRUJQVlA4IEIAAAAQAgCdASoQAAkAAUAmJYwCdH8AGBVvo94gAP79zN8HWxBIonbKJcGnX3wgOxNolRRO8FsavlFq4wgY6EX4zGM4AAA=' x='0' y='0' width='100%25' height='100%25' preserveAspectRatio='xMinYMin 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