Carbon Dioxide Sources from Alaska Driven by Increasing Early Winter Respiration from Artic 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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Technological University Dublin
2017
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Online Access: | https://arrow.tudublin.ie/scschbioart/177 https://doi.org/10.1073/pnas.1618567114 https://arrow.tudublin.ie/context/scschbioart/article/1188/viewcontent/CarbonDiox.pdf |
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ftdublininstt:oai:arrow.tudublin.ie:scschbioart-1188 2023-09-26T15:14:33+02:00 Carbon Dioxide Sources from Alaska Driven by Increasing Early Winter Respiration from Artic Tundra Commane, Roisin Lindaas, Jacob Benmergui, Joshua Luus, Kristina Chang, Rachel Daube, Bruce Euskirchen, Eugenie Henderson, John Karion, Anna Miller, John Miller, Scot Parazoo, Nicholas Randerson, James Sweeney, Colm Tans, Pieter Thoning, Kirk Veraverbeke, Sander Miller, Charles Wofsy, Steven 2017-01-01T08:00:00Z application/pdf https://arrow.tudublin.ie/scschbioart/177 https://doi.org/10.1073/pnas.1618567114 https://arrow.tudublin.ie/context/scschbioart/article/1188/viewcontent/CarbonDiox.pdf unknown Technological University Dublin https://arrow.tudublin.ie/scschbioart/177 doi:10.1073/pnas.1618567114 https://arrow.tudublin.ie/context/scschbioart/article/1188/viewcontent/CarbonDiox.pdf Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence Articles Alask artic carbon dioxide early winter respiration tundra Biology article 2017 ftdublininstt https://doi.org/10.1073/pnas.1618567114 2023-08-27T20:48:49Z 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 CO2emission 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 CO2in 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 Dublin Institute of Technology: ARROW@DIT (Archiving Research Resources on he Web) Arctic Proceedings of the National Academy of Sciences 114 21 5361 5366 |
institution |
Open Polar |
collection |
Dublin Institute of Technology: ARROW@DIT (Archiving Research Resources on he Web) |
op_collection_id |
ftdublininstt |
language |
unknown |
topic |
Alask artic carbon dioxide early winter respiration tundra Biology |
spellingShingle |
Alask artic carbon dioxide early winter respiration tundra Biology Commane, Roisin Lindaas, Jacob Benmergui, Joshua Luus, Kristina Chang, Rachel Daube, Bruce Euskirchen, Eugenie Henderson, John Karion, Anna Miller, John Miller, Scot Parazoo, Nicholas Randerson, James Sweeney, Colm Tans, Pieter Thoning, Kirk Veraverbeke, Sander Miller, Charles Wofsy, Steven Carbon Dioxide Sources from Alaska Driven by Increasing Early Winter Respiration from Artic Tundra |
topic_facet |
Alask artic carbon dioxide early winter respiration tundra Biology |
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 CO2emission 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 CO2in 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, Roisin Lindaas, Jacob Benmergui, Joshua Luus, Kristina Chang, Rachel Daube, Bruce Euskirchen, Eugenie Henderson, John Karion, Anna Miller, John Miller, Scot Parazoo, Nicholas Randerson, James Sweeney, Colm Tans, Pieter Thoning, Kirk Veraverbeke, Sander Miller, Charles Wofsy, Steven |
author_facet |
Commane, Roisin Lindaas, Jacob Benmergui, Joshua Luus, Kristina Chang, Rachel Daube, Bruce Euskirchen, Eugenie Henderson, John Karion, Anna Miller, John Miller, Scot Parazoo, Nicholas Randerson, James Sweeney, Colm Tans, Pieter Thoning, Kirk Veraverbeke, Sander Miller, Charles Wofsy, Steven |
author_sort |
Commane, Roisin |
title |
Carbon Dioxide Sources from Alaska Driven by Increasing Early Winter Respiration from Artic Tundra |
title_short |
Carbon Dioxide Sources from Alaska Driven by Increasing Early Winter Respiration from Artic Tundra |
title_full |
Carbon Dioxide Sources from Alaska Driven by Increasing Early Winter Respiration from Artic Tundra |
title_fullStr |
Carbon Dioxide Sources from Alaska Driven by Increasing Early Winter Respiration from Artic Tundra |
title_full_unstemmed |
Carbon Dioxide Sources from Alaska Driven by Increasing Early Winter Respiration from Artic Tundra |
title_sort |
carbon dioxide sources from alaska driven by increasing early winter respiration from artic tundra |
publisher |
Technological University Dublin |
publishDate |
2017 |
url |
https://arrow.tudublin.ie/scschbioart/177 https://doi.org/10.1073/pnas.1618567114 https://arrow.tudublin.ie/context/scschbioart/article/1188/viewcontent/CarbonDiox.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Barrow north slope Tundra Alaska |
genre_facet |
Arctic Barrow north slope Tundra Alaska |
op_source |
Articles |
op_relation |
https://arrow.tudublin.ie/scschbioart/177 doi:10.1073/pnas.1618567114 https://arrow.tudublin.ie/context/scschbioart/article/1188/viewcontent/CarbonDiox.pdf |
op_rights |
Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence |
op_doi |
https://doi.org/10.1073/pnas.1618567114 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
114 |
container_issue |
21 |
container_start_page |
5361 |
op_container_end_page |
5366 |
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1778135388191195136 |