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<ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Especial:Contribucions_pr%C3%B2pies" title="Una llista de les modificacions fetes des d'aquesta adreça IP [y]" accesskey="y"><span>Contribucions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Especial:Discussi%C3%B3_personal" title="Discussió sobre les edicions per aquesta adreça ip. [n]" accesskey="n"><span>Discussió per aquest IP</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Lloc"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Contingut" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Contingut</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">amaga</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Inici</div> </a> </li> <li id="toc-Vegeu_també" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Vegeu_també"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Vegeu també</span> </div> </a> <ul id="toc-Vegeu_també-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contingut" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Commuta la taula de continguts." > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Commuta la taula de continguts.</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Depressió atmosfèrica</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Vés a un article en una altra llengua. Disponible en 42 llengües" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-42" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">42 llengües</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%85%D9%86%D8%AE%D9%81%D8%B6_%D8%AC%D9%88%D9%8A" title="منخفض جوي - àrab" lang="ar" hreflang="ar" data-title="منخفض جوي" data-language-autonym="العربية" data-language-local-name="àrab" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%A8%E0%A6%BF%E0%A6%AE%E0%A7%8D%E0%A6%A8-%E0%A6%9A%E0%A6%BE%E0%A6%AA" title="নিম্ন-চাপ - bengalí" lang="bn" hreflang="bn" data-title="নিম্ন-চাপ" data-language-autonym="বাংলা" data-language-local-name="bengalí" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-cs badge-Q70893996 mw-list-item" title=""><a href="https://cs.wikipedia.org/wiki/Tlakov%C3%A1_n%C3%AD%C5%BEe" title="Tlaková níže - txec" lang="cs" hreflang="cs" data-title="Tlaková níže" data-language-autonym="Čeština" data-language-local-name="txec" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Diwasgedd" title="Diwasgedd - gal·lès" lang="cy" hreflang="cy" data-title="Diwasgedd" data-language-autonym="Cymraeg" data-language-local-name="gal·lès" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/H%C3%B8jtryk_og_lavtryk" title="Højtryk og lavtryk - danès" lang="da" hreflang="da" data-title="Højtryk og lavtryk" data-language-autonym="Dansk" data-language-local-name="danès" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Tiefdruckgebiet" title="Tiefdruckgebiet - alemany" lang="de" hreflang="de" data-title="Tiefdruckgebiet" data-language-autonym="Deutsch" data-language-local-name="alemany" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en badge-Q17437798 badge-goodarticle mw-list-item" title="article bo"><a href="https://en.wikipedia.org/wiki/Low-pressure_area" title="Low-pressure area - anglès" lang="en" hreflang="en" data-title="Low-pressure area" data-language-autonym="English" data-language-local-name="anglès" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Malalta_aeropremo" title="Malalta aeropremo - esperanto" lang="eo" hreflang="eo" data-title="Malalta aeropremo" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Borrasca" title="Borrasca - espanyol" lang="es" hreflang="es" data-title="Borrasca" data-language-autonym="Español" data-language-local-name="espanyol" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Depresio_(meteorologia)" title="Depresio (meteorologia) - basc" lang="eu" hreflang="eu" data-title="Depresio (meteorologia)" data-language-autonym="Euskara" data-language-local-name="basc" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%85%D8%B1%DA%A9%D8%B2_%DA%A9%D9%85%E2%80%8C%D9%81%D8%B4%D8%A7%D8%B1" title="مرکز کم‌فشار - persa" lang="fa" hreflang="fa" data-title="مرکز کم‌فشار" data-language-autonym="فارسی" data-language-local-name="persa" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Matalapaine" title="Matalapaine - finès" lang="fi" hreflang="fi" data-title="Matalapaine" data-language-autonym="Suomi" data-language-local-name="finès" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/D%C3%A9pression_(m%C3%A9t%C3%A9orologie)" title="Dépression (météorologie) - francès" lang="fr" hreflang="fr" data-title="Dépression (météorologie)" data-language-autonym="Français" data-language-local-name="francès" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-fy mw-list-item"><a href="https://fy.wikipedia.org/wiki/Legedrukgebiet" title="Legedrukgebiet - frisó occidental" lang="fy" hreflang="fy" data-title="Legedrukgebiet" data-language-autonym="Frysk" data-language-local-name="frisó occidental" class="interlanguage-link-target"><span>Frysk</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Lagrach" title="Lagrach - irlandès" lang="ga" hreflang="ga" data-title="Lagrach" data-language-autonym="Gaeilge" data-language-local-name="irlandès" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Borrasca" title="Borrasca - gallec" lang="gl" hreflang="gl" data-title="Borrasca" data-language-autonym="Galego" data-language-local-name="gallec" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A9%D7%A7%D7%A2_%D7%91%D7%A8%D7%95%D7%9E%D7%98%D7%A8%D7%99" title="שקע ברומטרי - hebreu" lang="he" hreflang="he" data-title="שקע ברומטרי" data-language-autonym="עברית" data-language-local-name="hebreu" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%A8%E0%A4%BF%E0%A4%AE%E0%A5%8D%E0%A4%A8_%E0%A4%A6%E0%A4%BE%E0%A4%AC_%E0%A4%95%E0%A5%8D%E0%A4%B7%E0%A5%87%E0%A4%A4%E0%A5%8D%E0%A4%B0" title="निम्न दाब क्षेत्र - hindi" lang="hi" hreflang="hi" data-title="निम्न दाब क्षेत्र" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Wilayah_bertekanan_rendah" title="Wilayah bertekanan rendah - indonesi" lang="id" hreflang="id" data-title="Wilayah bertekanan rendah" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesi" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Regiono_di_bas_aero-preso" title="Regiono di bas aero-preso - ido" lang="io" hreflang="io" data-title="Regiono di bas aero-preso" data-language-autonym="Ido" data-language-local-name="ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/L%C3%A6g%C3%B0_(ve%C3%B0urfr%C3%A6%C3%B0i)" title="Lægð (veðurfræði) - islandès" lang="is" hreflang="is" data-title="Lægð (veðurfræði)" data-language-autonym="Íslenska" data-language-local-name="islandès" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E4%BD%8E%E6%B0%97%E5%9C%A7" title="低気圧 - japonès" lang="ja" hreflang="ja" data-title="低気圧" data-language-autonym="日本語" data-language-local-name="japonès" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%93%E1%83%94%E1%83%9E%E1%83%A0%E1%83%94%E1%83%A1%E1%83%98%E1%83%90_(%E1%83%9B%E1%83%94%E1%83%A2%E1%83%94%E1%83%9D%E1%83%A0%E1%83%9D%E1%83%9A%E1%83%9D%E1%83%92%E1%83%98%E1%83%90)" title="დეპრესია (მეტეოროლოგია) - georgià" lang="ka" hreflang="ka" data-title="დეპრესია (მეტეოროლოგია)" data-language-autonym="ქართული" data-language-local-name="georgià" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%B5%E0%B2%BE%E0%B2%AF%E0%B3%81%E0%B2%AD%E0%B2%BE%E0%B2%B0_%E0%B2%95%E0%B3%81%E0%B2%B8%E0%B2%BF%E0%B2%A4" title="ವಾಯುಭಾರ ಕುಸಿತ - kannada" lang="kn" hreflang="kn" data-title="ವಾಯುಭಾರ ಕುಸಿತ" data-language-autonym="ಕನ್ನಡ" data-language-local-name="kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%A0%80%EA%B8%B0%EC%95%95" title="저기압 - coreà" lang="ko" hreflang="ko" data-title="저기압" data-language-autonym="한국어" data-language-local-name="coreà" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-kw mw-list-item"><a href="https://kw.wikipedia.org/wiki/Diwaskedh" title="Diwaskedh - còrnic" lang="kw" hreflang="kw" data-title="Diwaskedh" data-language-autonym="Kernowek" data-language-local-name="còrnic" class="interlanguage-link-target"><span>Kernowek</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%A8%E0%B5%8D%E0%B4%AF%E0%B5%82%E0%B4%A8%E0%B4%AE%E0%B5%BC%E0%B4%A6%E0%B5%8D%E0%B4%A6%E0%B4%82" title="ന്യൂനമർദ്ദം - malaiàlam" lang="ml" hreflang="ml" data-title="ന്യൂനമർദ്ദം" data-language-autonym="മലയാളം" data-language-local-name="malaiàlam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Lagedrukgebied" title="Lagedrukgebied - neerlandès" lang="nl" hreflang="nl" data-title="Lagedrukgebied" data-language-autonym="Nederlands" data-language-local-name="neerlandès" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/L%C3%A5gtrykk" title="Lågtrykk - noruec nynorsk" lang="nn" hreflang="nn" data-title="Lågtrykk" data-language-autonym="Norsk nynorsk" data-language-local-name="noruec nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Lavtrykk" title="Lavtrykk - noruec bokmål" lang="nb" hreflang="nb" data-title="Lavtrykk" data-language-autonym="Norsk bokmål" data-language-local-name="noruec bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Depression_(meteorologia)" title="Depression (meteorologia) - occità" lang="oc" hreflang="oc" data-title="Depression (meteorologia)" data-language-autonym="Occitan" data-language-local-name="occità" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Ni%C5%BC_baryczny" title="Niż baryczny - polonès" lang="pl" hreflang="pl" data-title="Niż baryczny" data-language-autonym="Polski" data-language-local-name="polonès" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/%C3%81rea_de_baixa_press%C3%A3o" title="Área de baixa pressão - portuguès" lang="pt" hreflang="pt" data-title="Área de baixa pressão" data-language-autonym="Português" data-language-local-name="portuguès" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%94%D0%B5%D0%BF%D1%80%D0%B5%D1%81%D1%81%D0%B8%D1%8F_(%D0%BC%D0%B5%D1%82%D0%B5%D0%BE%D1%80%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F)" title="Депрессия (метеорология) - rus" lang="ru" hreflang="ru" data-title="Депрессия (метеорология)" data-language-autonym="Русский" data-language-local-name="rus" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Low_pressure_area" title="Low pressure area - Simple English" lang="en-simple" hreflang="en-simple" data-title="Low pressure area" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/L%C3%A5gtryck" title="Lågtryck - suec" lang="sv" hreflang="sv" data-title="Lågtryck" data-language-autonym="Svenska" data-language-local-name="suec" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%A4%E0%AE%BE%E0%AE%B4%E0%AF%8D%E0%AE%B5%E0%AE%B4%E0%AF%81%E0%AE%A4%E0%AF%8D%E0%AE%A4%E0%AE%AA%E0%AF%8D_%E0%AE%AA%E0%AE%95%E0%AF%81%E0%AE%A4%E0%AE%BF" title="தாழ்வழுத்தப் பகுதி - tàmil" lang="ta" hreflang="ta" data-title="தாழ்வழுத்தப் பகுதி" data-language-autonym="தமிழ்" data-language-local-name="tàmil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%9A%E0%B8%A3%E0%B8%B4%E0%B9%80%E0%B8%A7%E0%B8%93%E0%B8%84%E0%B8%A7%E0%B8%B2%E0%B8%A1%E0%B8%81%E0%B8%94%E0%B8%AD%E0%B8%B2%E0%B8%81%E0%B8%B2%E0%B8%A8%E0%B8%95%E0%B9%88%E0%B8%B3" title="บริเวณความกดอากาศต่ำ - tai" lang="th" hreflang="th" data-title="บริเวณความกดอากาศต่ำ" data-language-autonym="ไทย" data-language-local-name="tai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Al%C3%A7ak_bas%C4%B1n%C3%A7" title="Alçak basınç - turc" lang="tr" hreflang="tr" data-title="Alçak basınç" data-language-autonym="Türkçe" data-language-local-name="turc" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%94%D0%B5%D0%BF%D1%80%D0%B5%D1%81%D1%96%D1%8F_(%D1%84%D1%96%D0%B7%D0%B8%D0%BA%D0%B0)" title="Депресія (фізика) - ucraïnès" lang="uk" hreflang="uk" data-title="Депресія (фізика)" data-language-autonym="Українська" data-language-local-name="ucraïnès" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Khu_v%E1%BB%B1c_%C3%A1p_su%E1%BA%A5t_th%E1%BA%A5p" title="Khu vực áp suất thấp - vietnamita" lang="vi" hreflang="vi" data-title="Khu vực áp suất thấp" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E4%BD%8E%E6%B0%94%E5%8E%8B" title="低气压 - xinès" lang="zh" hreflang="zh" data-title="低气压" data-language-autonym="中文" data-language-local-name="xinès" 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class="vector-pinnable-header-label">Aparença</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">amaga</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">De la Viquipèdia, l'enciclopèdia lliure</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="ca" dir="ltr"><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fitxer:Low_pressure_system_over_Iceland.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Low_pressure_system_over_Iceland.jpg/220px-Low_pressure_system_over_Iceland.jpg" decoding="async" width="220" height="191" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Low_pressure_system_over_Iceland.jpg/330px-Low_pressure_system_over_Iceland.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Low_pressure_system_over_Iceland.jpg/440px-Low_pressure_system_over_Iceland.jpg 2x" data-file-width="6000" data-file-height="5200" /></a><figcaption>Una depressió a <a href="/wiki/Isl%C3%A0ndia" title="Islàndia">Islàndia</a>.</figcaption></figure> <p>Una <b>depressió atmosfèrica</b> és una zona amb la <a href="/wiki/Pressi%C3%B3_atmosf%C3%A8rica" title="Pressió atmosfèrica">pressió atmosfèrica</a> més baixa que les zones del voltant. A l'<a href="/wiki/Hemisferi_nord" title="Hemisferi nord">hemisferi nord</a> les depressions giren en sentit contrari al de les agulles d'un rellotge, en canvi a l'hemisferi sud giren en sentit horari, això ho motiva l'<a href="/wiki/Efecte_de_Coriolis" title="Efecte de Coriolis">efecte de Coriolis</a>. Les depressions s'originen a la <a href="/wiki/Zona_de_converg%C3%A8ncia_intertropical" title="Zona de convergència intertropical">Zona de convergència intertropical</a> formant part de la circulació de la <a href="/wiki/C%C3%A8l%C2%B7lula_de_Hadley" title="Cèl·lula de Hadley">cèl·lula de Hadley</a>. </p><p>Les depressions, s'associen normalment amb <a href="/wiki/Vent" title="Vent">vents</a> forts i elevació <a href="/wiki/Atmosfera_terrestre" title="Atmosfera terrestre">atmosfèrica</a>. Aquesta elevació sol produir <a href="/wiki/Cel" title="Cel">cel</a> cobert, a causa del <a href="/wiki/Gradient_t%C3%A8rmic" title="Gradient tèrmic">gradient tèrmic</a> quan l'aire es col·lapsa. Així, les depressions solen portar cels ennuvolats o coberts, que poden minimitzar la <a href="/wiki/Temperatura" title="Temperatura">temperatura</a> diürna tant a l'estiu com a l'<a href="/wiki/Hivern" title="Hivern">hivern</a>. Això es produeix per l'entrada de menys radiació solar d'ona curta i temperatures més baixes, ja que els <a href="/wiki/N%C3%BAvols" class="mw-redirect" title="Núvols">núvols</a> reflecteixen la llum solar. De nit, l'efecte d'absorció dels núvols en la radiació d'ona llarga, com la calor de la superfície, permet que les temperatures diürnes siguin més fresques en totes les estacions de l'<a href="/wiki/Any" title="Any">any</a>. </p><p>Les <a href="/w/index.php?title=Depressi%C3%B3_frontal&action=edit&redlink=1" class="new" title="Depressió frontal (encara no existeix)">depressions frontals</a> són un fenomen de la <a href="/wiki/Zona_temperada" class="mw-redirect" title="Zona temperada">zona temperada</a>, i es desenvolupen al llarg de fronts polars com a resultat de la interacció entre el masses d'aire fred i calent. Les <a href="/wiki/Depressi%C3%B3_t%C3%A8rmica" title="Depressió tèrmica">depressions tèrmiques</a> també es formen en zones com <a href="/wiki/Death_Valley" class="mw-redirect" title="Death Valley">Death Valley</a> com a resultat de la intensa calor despresa des de la superfície; són molt més petites en extensió geogràfica que els fronts de convergència o les depressions frontals. Els sistemes de baixes pressions en superfície tendiran a ser petits en àrea i tenir <a href="/wiki/Vent" title="Vent">vents</a> en superfície més forts que un sistema anticiclònic, a causa de la suma de fricció en superfície per força del gradient de <a href="/wiki/Pressi%C3%B3" title="Pressió">pressió</a>, <a href="/wiki/For%C3%A7a_centr%C3%ADfuga" title="Força centrífuga">força centrífuga</a> i l'<a href="/wiki/Efecte_Coriolis" class="mw-redirect" title="Efecte Coriolis">efecte Coriolis</a> que controlen la circulació. </p><p>Als deserts, l'absència d'<a href="/wiki/Humitat" title="Humitat">humitat</a> i plantes en superfície que normalment proporcionarien refrigeració per evaporació pot dur a un augment ràpid i intens de la calor solar en les capes baixes de l'aire. L'<a href="/wiki/Aire" title="Aire">aire</a> calent és menys dens que l'aire fred d'al voltant. Això, combinat amb l'elevació d'aire calent, resulta en una depressió aïllada, anomenada <a href="/w/index.php?title=Baixa_termal&action=edit&redlink=1" class="new" title="Baixa termal (encara no existeix)">baixa termal</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Vegeu_també"><span id="Vegeu_tamb.C3.A9"></span>Vegeu també</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Depressi%C3%B3_atmosf%C3%A8rica&action=edit&section=1" title="Modifica la secció: Vegeu també"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r33663753">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:#f9f9f9;display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 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