Carbon Cycle Greenhouse Gases - NOAA Global Monitoring Laboratory

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class='row'> <div class='col-md-7'> <p class='pt-2'> The Carbon Cycle Greenhouse Gases (CCGG) research area operates the <strong><a href='about.html'>Global Greenhouse Gas Reference Network</a></strong>, measuring the atmospheric distribution and trends of the three main long-term drivers of climate change, carbon dioxide (CO<sub>2</sub>), methane (CH<sub>4</sub>), and nitrous oxide (N<sub>2</sub>O), as well as carbon monoxide (CO) which is an important indicator of air pollution. </p> <p> CCGG is also active in the development of a global model called 'CarbonTracker', a measurement and modeling system developed to keep track of sources (emissions to the atmosphere) and sinks (removal from the atmosphere) of carbon dioxide around the world. A version of CarbonTracker for methane (CH<sub>4</sub>) has also been developed, as well as CarbonTracker-Lagrange (CT-L), a regional inverse modeling framework designed for estimating North American greenhouse gas emissions and uptake fluxes. </p> </div> <div class="col-md-5"> <div class="row"> <div class="col-lg-3 col-6 text-center" style="padding: 0;"> <a class="btn btn-gml-icon" href="/dv/site/index.php?program=ccgg"> <span class="fa-stack fa-2x"> <i class="fas fa-circle fa-stack-2x"></i> <i class="fas fa-globe-americas fa-stack-1x fa-inverse"></i> </span> <div class="icon-label">Sites</div></a> </div> <div class="col-lg-3 col-6 text-center" style="padding: 0;"> <a class="btn btn-gml-icon" href="/dv/data/index.php?category=Greenhouse%2BGases"> <span class="fa-stack fa-2x"> <i class="fas fa-circle fa-stack-2x"></i> <i class="fas fa-database fa-stack-1x fa-inverse"></i> </span> <div class="icon-label">Datasets</div></a> </div> <div class="col-lg-3 col-6 text-center" style="padding: 0;"> <a class="btn btn-gml-icon" href="/dv/iadv/?map_program=ccgg"> <span class="fa-stack fa-2x"> <i class="fas fa-circle fa-stack-2x"></i> <i class="fas fa-chart-line fa-stack-1x fa-inverse"></i> </span> <div class="icon-label">Data Viewer</div></a> </div> <div class="col-lg-3 col-6 text-center" style="padding: 0;"> <a class="btn btn-gml-icon" href="/bin/news.php?code=ccgg"> <span class="fa-stack fa-2x"> <i class="fas fa-circle fa-stack-2x"></i> <i class="fas fa-newspaper fa-stack-1x fa-inverse"></i> </span> <div class="icon-label">News</div></a> </div> </div> <style> @import url('https://fonts.googleapis.com/css?family=Roboto'); .co2box { border: 1px solid #006699; /* width: 250px; */ border-radius: 5px; font-family: 'Roboto', sans-serif; margin: 3px 0; } .co2boxsmall { border: 1px solid #aaaaaa; width: 260px; border-radius: 5px; font-family: sans-serif; margin: 1px 0; background-color: #f0f0f0; } .co2box::after { content: ""; clear: both; display: table; } .co2banner { background-color: #006699; color: #ffffff; font-size: 18px; padding: 1px 0 1px 5px; } .co2body { padding: 0px; } .co2val { font-size: 18px; } #co2logo { margin: 12px 5px 5px 10px; max-width: 100%; vertical-align: middle; } .co2date { color: #006699; margin-left: 10px; font-size: 18px; } .value { color: #aa2200; font-size: 22px; margin-left: 10px; } .co2unit { font-size: 16px; color: #aa2200; } .co2datesmall { color: #444444; margin-left: 4px; font-size: 12px; } .valuesmall { color: #aa2200; font-size: 12px; margin-left: 3px; font-weight: 600; } .co2unitsmall { font-size: 10px; color: #aa2200; } .co2boxsmall img { margin: 2px 10px 0 0; width: 16px; vertical-align: middle; } .co2link { text-decoration: none; } </style> <a href="/ccgg/trends/gl_trend.html" class='co2link' target='_blank'> <div class='co2box'> <div class='co2banner'> Estimated Global Daily CO<sub>2</sub> </div> <div class='co2body'> <img src='/ccgg/trends/embed/noaalogo2.png' id='co2logo' align='left' alt='NOAA logo'> <div class='co2val'> <span class='co2date'>April 06, 2025</span><br> <span class='value'> 425.53 </span><span class='co2unit'> ppm</span> </div> </div> </div> </a> <div class="media ml-1 mt-3"> <span class="fas fa-dot-circle mr-2 mt-1 small" style="color: #0056b3"></span> <div class="media-body"> <a href="/ccgg/covid2.html"> <div class="h5 mt-0">Can we see a change in the CO<sub>2</sub> record because of COVID-19?</div> </a> </div> </div> </div> </div> <div class="card-deck mt-5 mb-4"> <div class="row no-gutters row-cols-1 row-cols-md-2 row-cols-lg-4"> <div class="col mb-4"> <div class="card shadow-sm"> <a href="/ccgg/about.html"><img class="card-img-top topic-img" src="sites.webp" alt="Reference Network"></a> <div class="card-header h5">About</div> <div class="list-group list-group-flush"> <a class="list-group-item" href='/ccgg/about.html'>Reference Network Overview</a> <a class="list-group-item" href='/ccgg/flask.html'>Flask Sampling Network</a> <a class="list-group-item" href='/ccgg/insitu/'>In-Situ Measurements</a> <a class="list-group-item" href='/ccgg/aircraft/'>Aircraft Measurements</a> <a class="list-group-item" href='/ccgg/aircore/'>AirCore Sampling System</a>  </div> </div> </div> <div class="col mb-4"> <div class="card shadow-sm"> <a href="/ccgg/data/"> <img class="card-img-top topic-img" src="/webdata/ccgg/graphs/co2_global.png" alt="Current Trends"></a> <div class="card-header h5">Data</div> <div class="list-group list-group-flush"> <a class="list-group-item" href='/ccgg/data/'>Data Summary</a> <a class="list-group-item" href='/ccgg/trends/'>Trends in CO<sub>2</sub>, CH<sub>4</sub>, N<sub>2</sub>O, SF<sub>6</sub></sub></a> <a class="list-group-item" href='/ccgg/obspack/'><b>Obs</b>ervation <b>Pack</b>age</a> <a class="list-group-item" href='/ccgg/mbl/'>MBL Reference</a>  </div> </div> </div> <div class="col mb-4"> <div class="card shadow-sm"> <a href="/ccgg/carbontracker/"><img class="card-img-top topic-img" src="ct2.webp" alt="carbontracker plot of co2 distribution over globe"></a> <div class="card-header h5">Products</div> <div class="list-group list-group-flush"> <a class="list-group-item" href='/ccgg/carbontracker/'>CarbonTracker CO<sub>2</sub></a> <a class="list-group-item" href='/ccgg/carbontracker-ch4/'>CarbonTracker CH<sub>4</sub></a> <a class="list-group-item" href='/ccgg/carbontracker-lagrange/'>CarbonTracker Lagrange</a> <a class="list-group-item" href='/aggi/'>Greenhouse Gas Index</a> </div> </div> </div> <div class="col mb-4"> <div class="card shadow-sm"> <a href="/education/"><img class="card-img-top topic-img" src="images/carbon_cycle.webp" alt="carbon cycle"></a> <div class="card-header h5">Information</div> <div class="list-group list-group-flush"> <a class="list-group-item" href='/ccgg/figures/'>Figures</a> <a class="list-group-item" href='/education/'>Education and Outreach</a> <a class="list-group-item" href="/ccgg/about/co2_measurements.html">How CO<sub>2</sub> is Measured</a> <a 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Carbon Cycle Greenhouse Gases - NOAA Global Monitoring Laboratory