Filters: Tags: Projecting future states 1-Predict or Map Impact Changing Permafrost (X)
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Tags: Projecting future states 1-Predict or Map Impact Changing Permafrost
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Tags: Projecting future states 1-Predict or Map Impact Changing Permafrost
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Tags: Projecting future states 1-Predict or Map Impact Changing Permafrost
Peat in the discontinuous permafrost zone contains a globally significant reservoir of carbon that has undergone multiple permafrost-thaw cycles since the end of the mid-Holocene (~3700 years before present). Periods of thaw increase C decomposition rates which leads to the release of CO2 and CH4 to the atmosphere creating potential climate feedback. To determine the magnitude and direction of such feedback, we measured CO2 and CH4 emissions and modeled C accumulation rates and radiative fluxes from measurements of two radioactive tracers with differing lifetimes to describe the C balance of the peatland over multiple permafrost-thaw cycles since the initiation of permafrost at the site. At thaw features, the balance...
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Types: Citation;
Tags: Projecting future states 1-Predict or Map Impact Changing Permafrost
Categories: Publication;
Types: Citation;
Tags: Projecting future states 1-Predict or Map Impact Changing Permafrost
Northern high-latitude carbon sources and sinks, including those resulting from degrading permafrost, are thought to be sensitive to the rapidly warming climate. Because the near-surface atmosphere integrates surface fluxes over large (∼500-1000 km) scales, atmospheric monitoring of carbon dioxide (CO2) and methane (CH4) mole fractions in the daytime mixed layer is a promising method for detecting change in the carbon cycle throughout boreal Alaska. Here we use CO2 and CH4 measurements from a NOAA tower 17 km north of Fairbanks, AK, established as part of NASA's Carbon in Arctic Reservoirs Vulnerability Experiment (CARVE), to investigate regional fluxes of CO2 and CH4 for 2012-2014. CARVE was designed to use aircraft...
Categories: Data,
Publication;
Types: Citation,
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Tags: Projecting future states 1-Predict or Map Impact Changing Permafrost
Categories: Data,
Publication;
Types: Citation,
Downloadable,
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OGC WFS Layer,
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Shapefile;
Tags: Projecting future states 1-Predict or Map Impact Changing Permafrost
Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Projecting future states 1-Predict or Map Impact Changing Permafrost
Categories: Data,
Publication;
Types: Citation,
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Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Projecting future states 1-Predict or Map Impact Changing Permafrost
The permafrost component of the cryosphere is changing dramatically, but the permafrost region is not well monitored and the consequences of change are not well understood. Changing permafrost interacts with ecosystems and climate on various spatial and temporal scales. The feedbacks resulting from these interactions range from local impacts on topography, hydrology, and biology to complex influences on global scale biogeochemical cycling. This review contributes to this focus issue by synthesizing its 28 multidisciplinary studies which provide field evidence, remote sensing observations, and modeling results on various scales. We synthesize study results from a diverse range of permafrost landscapes and ecosystems...
Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Projecting future states 1-Predict or Map Impact Changing Permafrost
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