Quantifying Climate Feedbacks from Abrupt Changes in High-Latitude Trace-Gas Emissions
Our overall goal was to quantify the potential for threshold changes in natural emission rates of trace gases, particularly methane and carbon dioxide, from pan-arctic terrestrial systems under the spectrum of anthropogenically forced climate warming, and the extent to which these emissions provide...
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ftosti:oai:osti.gov:1076751 2023-07-30T04:01:23+02:00 Quantifying Climate Feedbacks from Abrupt Changes in High-Latitude Trace-Gas Emissions Schlosser, Courtney Adam Walter-Anthony, Katey Zhuang, Qianlai Melillo, Jerry 2013-05-17 application/pdf http://www.osti.gov/servlets/purl/1076751 https://www.osti.gov/biblio/1076751 https://doi.org/10.2172/1076751 unknown http://www.osti.gov/servlets/purl/1076751 https://www.osti.gov/biblio/1076751 https://doi.org/10.2172/1076751 doi:10.2172/1076751 54 ENVIRONMENTAL SCIENCES 2013 ftosti https://doi.org/10.2172/1076751 2023-07-11T08:52:49Z Our overall goal was to quantify the potential for threshold changes in natural emission rates of trace gases, particularly methane and carbon dioxide, from pan-arctic terrestrial systems under the spectrum of anthropogenically forced climate warming, and the extent to which these emissions provide a strong feedback mechanism to global climate warming. This goal is motivated under the premise that polar amplification of global climate warming will induce widespread thaw and degradation of the permafrost, and would thus cause substantial changes in the extent of wetlands and lakes, especially thermokarst (thaw) lakes, over the Arctic. Through a coordinated effort of field measurements, model development, and numerical experimentation with an integrated assessment model framework, we have investigated the following hypothesis: There exists a climate-warming threshold beyond which permafrost degradation becomes widespread and thus instigates strong and/or sharp increases in methane emissions (via thermokarst lakes and wetland expansion). These would outweigh any increased uptake of carbon (e.g. from peatlands) and would result in a strong, positive feedback to global climate warming. Other/Unknown Material Arctic permafrost Thermokarst SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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54 ENVIRONMENTAL SCIENCES |
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54 ENVIRONMENTAL SCIENCES Schlosser, Courtney Adam Walter-Anthony, Katey Zhuang, Qianlai Melillo, Jerry Quantifying Climate Feedbacks from Abrupt Changes in High-Latitude Trace-Gas Emissions |
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54 ENVIRONMENTAL SCIENCES |
description |
Our overall goal was to quantify the potential for threshold changes in natural emission rates of trace gases, particularly methane and carbon dioxide, from pan-arctic terrestrial systems under the spectrum of anthropogenically forced climate warming, and the extent to which these emissions provide a strong feedback mechanism to global climate warming. This goal is motivated under the premise that polar amplification of global climate warming will induce widespread thaw and degradation of the permafrost, and would thus cause substantial changes in the extent of wetlands and lakes, especially thermokarst (thaw) lakes, over the Arctic. Through a coordinated effort of field measurements, model development, and numerical experimentation with an integrated assessment model framework, we have investigated the following hypothesis: There exists a climate-warming threshold beyond which permafrost degradation becomes widespread and thus instigates strong and/or sharp increases in methane emissions (via thermokarst lakes and wetland expansion). These would outweigh any increased uptake of carbon (e.g. from peatlands) and would result in a strong, positive feedback to global climate warming. |
author |
Schlosser, Courtney Adam Walter-Anthony, Katey Zhuang, Qianlai Melillo, Jerry |
author_facet |
Schlosser, Courtney Adam Walter-Anthony, Katey Zhuang, Qianlai Melillo, Jerry |
author_sort |
Schlosser, Courtney Adam |
title |
Quantifying Climate Feedbacks from Abrupt Changes in High-Latitude Trace-Gas Emissions |
title_short |
Quantifying Climate Feedbacks from Abrupt Changes in High-Latitude Trace-Gas Emissions |
title_full |
Quantifying Climate Feedbacks from Abrupt Changes in High-Latitude Trace-Gas Emissions |
title_fullStr |
Quantifying Climate Feedbacks from Abrupt Changes in High-Latitude Trace-Gas Emissions |
title_full_unstemmed |
Quantifying Climate Feedbacks from Abrupt Changes in High-Latitude Trace-Gas Emissions |
title_sort |
quantifying climate feedbacks from abrupt changes in high-latitude trace-gas emissions |
publishDate |
2013 |
url |
http://www.osti.gov/servlets/purl/1076751 https://www.osti.gov/biblio/1076751 https://doi.org/10.2172/1076751 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost Thermokarst |
genre_facet |
Arctic permafrost Thermokarst |
op_relation |
http://www.osti.gov/servlets/purl/1076751 https://www.osti.gov/biblio/1076751 https://doi.org/10.2172/1076751 doi:10.2172/1076751 |
op_doi |
https://doi.org/10.2172/1076751 |
_version_ |
1772812122198114304 |