Carbon dioxide sources from Alaska driven by increasing early winter respiration from Arctic tundra
High-latitude ecosystems have the capacity to release large amounts of carbon dioxide (CO2) to the atmosphere in response to increasing temperatures, representing a potentially significant positive feedback within the climate system. Here, we combine aircraft and tower observations of atmospheric CO...
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ftcdlib:oai:escholarship.org:ark:/13030/qt9wx1v70w 2023-09-05T13:16:48+02:00 Carbon dioxide sources from Alaska driven by increasing early winter respiration from Arctic tundra Commane, Róisín Lindaas, Jakob Benmergui, Joshua Luus, Kristina A Chang, Rachel Y-W Daube, Bruce C Euskirchen, Eugénie S Henderson, John M Karion, Anna Miller, John B Miller, Scot M Parazoo, Nicholas C Randerson, James T Sweeney, Colm Tans, Pieter Thoning, Kirk Veraverbeke, Sander Miller, Charles E Wofsy, Steven C 5361 - 5366 2017-05-23 application/pdf https://escholarship.org/uc/item/9wx1v70w unknown eScholarship, University of California qt9wx1v70w https://escholarship.org/uc/item/9wx1v70w public Proceedings of the National Academy of Sciences of the United States of America, vol 114, iss 21 Climate Action carbon dioxide Arctic early winter respiration Alaska tundra article 2017 ftcdlib 2023-08-21T18:05:14Z High-latitude ecosystems have the capacity to release large amounts of carbon dioxide (CO2) to the atmosphere in response to increasing temperatures, representing a potentially significant positive feedback within the climate system. Here, we combine aircraft and tower observations of atmospheric CO2 with remote sensing data and meteorological products to derive temporally and spatially resolved year-round CO2 fluxes across Alaska during 2012-2014. We find that tundra ecosystems were a net source of CO2 to the atmosphere annually, with especially high rates of respiration during early winter (October through December). Long-term records at Barrow, AK, suggest that CO2 emission rates from North Slope tundra have increased during the October through December period by 73% ± 11% since 1975, and are correlated with rising summer temperatures. Together, these results imply increasing early winter respiration and net annual emission of CO2 in Alaska, in response to climate warming. Our results provide evidence that the decadal-scale increase in the amplitude of the CO2 seasonal cycle may be linked with increasing biogenic emissions in the Arctic, following the growing season. Early winter respiration was not well simulated by the Earth System Models used to forecast future carbon fluxes in recent climate assessments. Therefore, these assessments may underestimate the carbon release from Arctic soils in response to a warming climate. Article in Journal/Newspaper Arctic Barrow north slope Tundra Alaska University of California: eScholarship Arctic |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Climate Action carbon dioxide Arctic early winter respiration Alaska tundra |
spellingShingle |
Climate Action carbon dioxide Arctic early winter respiration Alaska tundra Commane, Róisín Lindaas, Jakob Benmergui, Joshua Luus, Kristina A Chang, Rachel Y-W Daube, Bruce C Euskirchen, Eugénie S Henderson, John M Karion, Anna Miller, John B Miller, Scot M Parazoo, Nicholas C Randerson, James T Sweeney, Colm Tans, Pieter Thoning, Kirk Veraverbeke, Sander Miller, Charles E Wofsy, Steven C Carbon dioxide sources from Alaska driven by increasing early winter respiration from Arctic tundra |
topic_facet |
Climate Action carbon dioxide Arctic early winter respiration Alaska tundra |
description |
High-latitude ecosystems have the capacity to release large amounts of carbon dioxide (CO2) to the atmosphere in response to increasing temperatures, representing a potentially significant positive feedback within the climate system. Here, we combine aircraft and tower observations of atmospheric CO2 with remote sensing data and meteorological products to derive temporally and spatially resolved year-round CO2 fluxes across Alaska during 2012-2014. We find that tundra ecosystems were a net source of CO2 to the atmosphere annually, with especially high rates of respiration during early winter (October through December). Long-term records at Barrow, AK, suggest that CO2 emission rates from North Slope tundra have increased during the October through December period by 73% ± 11% since 1975, and are correlated with rising summer temperatures. Together, these results imply increasing early winter respiration and net annual emission of CO2 in Alaska, in response to climate warming. Our results provide evidence that the decadal-scale increase in the amplitude of the CO2 seasonal cycle may be linked with increasing biogenic emissions in the Arctic, following the growing season. Early winter respiration was not well simulated by the Earth System Models used to forecast future carbon fluxes in recent climate assessments. Therefore, these assessments may underestimate the carbon release from Arctic soils in response to a warming climate. |
format |
Article in Journal/Newspaper |
author |
Commane, Róisín Lindaas, Jakob Benmergui, Joshua Luus, Kristina A Chang, Rachel Y-W Daube, Bruce C Euskirchen, Eugénie S Henderson, John M Karion, Anna Miller, John B Miller, Scot M Parazoo, Nicholas C Randerson, James T Sweeney, Colm Tans, Pieter Thoning, Kirk Veraverbeke, Sander Miller, Charles E Wofsy, Steven C |
author_facet |
Commane, Róisín Lindaas, Jakob Benmergui, Joshua Luus, Kristina A Chang, Rachel Y-W Daube, Bruce C Euskirchen, Eugénie S Henderson, John M Karion, Anna Miller, John B Miller, Scot M Parazoo, Nicholas C Randerson, James T Sweeney, Colm Tans, Pieter Thoning, Kirk Veraverbeke, Sander Miller, Charles E Wofsy, Steven C |
author_sort |
Commane, Róisín |
title |
Carbon dioxide sources from Alaska driven by increasing early winter respiration from Arctic tundra |
title_short |
Carbon dioxide sources from Alaska driven by increasing early winter respiration from Arctic tundra |
title_full |
Carbon dioxide sources from Alaska driven by increasing early winter respiration from Arctic tundra |
title_fullStr |
Carbon dioxide sources from Alaska driven by increasing early winter respiration from Arctic tundra |
title_full_unstemmed |
Carbon dioxide sources from Alaska driven by increasing early winter respiration from Arctic tundra |
title_sort |
carbon dioxide sources from alaska driven by increasing early winter respiration from arctic tundra |
publisher |
eScholarship, University of California |
publishDate |
2017 |
url |
https://escholarship.org/uc/item/9wx1v70w |
op_coverage |
5361 - 5366 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Barrow north slope Tundra Alaska |
genre_facet |
Arctic Barrow north slope Tundra Alaska |
op_source |
Proceedings of the National Academy of Sciences of the United States of America, vol 114, iss 21 |
op_relation |
qt9wx1v70w https://escholarship.org/uc/item/9wx1v70w |
op_rights |
public |
_version_ |
1776198260033060864 |