COS-derived GPP relationships with temperature and light help explain high-latitude atmospheric CO2 seasonal cycle amplification
In the Arctic and Boreal region (ABR) where warming is especially pronounced, the increase of gross primary production (GPP) has been suggested as an important driver for the increase of the atmospheric CO 2 seasonal cycle amplitude (SCA). However, the role of GPP relative to changes in ecosystem re...
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Online Access: | https://ueaeprints.uea.ac.uk/id/eprint/81843/ https://doi.org/10.1073/pnas.2103423118 |
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:81843 2023-05-15T15:11:28+02:00 COS-derived GPP relationships with temperature and light help explain high-latitude atmospheric CO2 seasonal cycle amplification Hu, Lei Montzka, Stephen A. Kaushik, Aleya Andrews, Arlyn E. Sweeney, Colm Miller, John Baker, Ian T. Denning, Scott Campbell, Elliott Shiga, Yoichi P. Tans, Pieter Siso, M. Carolina Crotwell, Molly Mckain, Kathryn Thoning, Kirk Hall, Bradley Vimont, Isaac Elkins, James W. Whelan, Mary E. Suntharalingam, Parvadha 2021-08-17 https://ueaeprints.uea.ac.uk/id/eprint/81843/ https://doi.org/10.1073/pnas.2103423118 unknown Hu, Lei, Montzka, Stephen A., Kaushik, Aleya, Andrews, Arlyn E., Sweeney, Colm, Miller, John, Baker, Ian T., Denning, Scott, Campbell, Elliott, Shiga, Yoichi P., Tans, Pieter, Siso, M. Carolina, Crotwell, Molly, Mckain, Kathryn, Thoning, Kirk, Hall, Bradley, Vimont, Isaac, Elkins, James W., Whelan, Mary E. and Suntharalingam, Parvadha (2021) COS-derived GPP relationships with temperature and light help explain high-latitude atmospheric CO2 seasonal cycle amplification. Proceedings of the National Academy of Sciences of the United States of America (PNAS), 118 (33). ISSN 0027-8424 doi:10.1073/pnas.2103423118 Article PeerReviewed 2021 ftuniveastangl https://doi.org/10.1073/pnas.2103423118 2023-01-30T21:55:55Z In the Arctic and Boreal region (ABR) where warming is especially pronounced, the increase of gross primary production (GPP) has been suggested as an important driver for the increase of the atmospheric CO 2 seasonal cycle amplitude (SCA). However, the role of GPP relative to changes in ecosystem respiration (ER) remains unclear, largely due to our inability to quantify these gross fluxes on regional scales. Here, we use atmospheric carbonyl sulfide (COS) measurements to provide observation-based estimates of GPP over the North American ABR. Our annual GPP estimate is 3.6 (2.4 to 5.5) PgC · y −1 between 2009 and 2013, the uncertainty of which is smaller than the range of GPP estimated from terrestrial ecosystem models (1.5 to 9.8 PgC · y −1). Our COS-derived monthly GPP shows significant correlations in space and time with satellite-based GPP proxies, solar-induced chlorophyll fluorescence, and near-infrared reflectance of vegetation. Furthermore, the derived monthly GPP displays two different linear relationships with soil temperature in spring versus autumn, whereas the relationship between monthly ER and soil temperature is best described by a single quadratic relationship throughout the year. In spring to midsummer, when GPP is most strongly correlated with soil temperature, our results suggest the warming-induced increases of GPP likely exceeded the increases of ER over the past four decades. In autumn, however, increases of ER were likely greater than GPP due to light limitations on GPP, thereby enhancing autumn net carbon emissions. Both effects have likely contributed to the atmospheric CO 2 SCA amplification observed in the ABR. Article in Journal/Newspaper Arctic University of East Anglia: UEA Digital Repository Arctic Proceedings of the National Academy of Sciences 118 33 |
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University of East Anglia: UEA Digital Repository |
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ftuniveastangl |
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description |
In the Arctic and Boreal region (ABR) where warming is especially pronounced, the increase of gross primary production (GPP) has been suggested as an important driver for the increase of the atmospheric CO 2 seasonal cycle amplitude (SCA). However, the role of GPP relative to changes in ecosystem respiration (ER) remains unclear, largely due to our inability to quantify these gross fluxes on regional scales. Here, we use atmospheric carbonyl sulfide (COS) measurements to provide observation-based estimates of GPP over the North American ABR. Our annual GPP estimate is 3.6 (2.4 to 5.5) PgC · y −1 between 2009 and 2013, the uncertainty of which is smaller than the range of GPP estimated from terrestrial ecosystem models (1.5 to 9.8 PgC · y −1). Our COS-derived monthly GPP shows significant correlations in space and time with satellite-based GPP proxies, solar-induced chlorophyll fluorescence, and near-infrared reflectance of vegetation. Furthermore, the derived monthly GPP displays two different linear relationships with soil temperature in spring versus autumn, whereas the relationship between monthly ER and soil temperature is best described by a single quadratic relationship throughout the year. In spring to midsummer, when GPP is most strongly correlated with soil temperature, our results suggest the warming-induced increases of GPP likely exceeded the increases of ER over the past four decades. In autumn, however, increases of ER were likely greater than GPP due to light limitations on GPP, thereby enhancing autumn net carbon emissions. Both effects have likely contributed to the atmospheric CO 2 SCA amplification observed in the ABR. |
format |
Article in Journal/Newspaper |
author |
Hu, Lei Montzka, Stephen A. Kaushik, Aleya Andrews, Arlyn E. Sweeney, Colm Miller, John Baker, Ian T. Denning, Scott Campbell, Elliott Shiga, Yoichi P. Tans, Pieter Siso, M. Carolina Crotwell, Molly Mckain, Kathryn Thoning, Kirk Hall, Bradley Vimont, Isaac Elkins, James W. Whelan, Mary E. Suntharalingam, Parvadha |
spellingShingle |
Hu, Lei Montzka, Stephen A. Kaushik, Aleya Andrews, Arlyn E. Sweeney, Colm Miller, John Baker, Ian T. Denning, Scott Campbell, Elliott Shiga, Yoichi P. Tans, Pieter Siso, M. Carolina Crotwell, Molly Mckain, Kathryn Thoning, Kirk Hall, Bradley Vimont, Isaac Elkins, James W. Whelan, Mary E. Suntharalingam, Parvadha COS-derived GPP relationships with temperature and light help explain high-latitude atmospheric CO2 seasonal cycle amplification |
author_facet |
Hu, Lei Montzka, Stephen A. Kaushik, Aleya Andrews, Arlyn E. Sweeney, Colm Miller, John Baker, Ian T. Denning, Scott Campbell, Elliott Shiga, Yoichi P. Tans, Pieter Siso, M. Carolina Crotwell, Molly Mckain, Kathryn Thoning, Kirk Hall, Bradley Vimont, Isaac Elkins, James W. Whelan, Mary E. Suntharalingam, Parvadha |
author_sort |
Hu, Lei |
title |
COS-derived GPP relationships with temperature and light help explain high-latitude atmospheric CO2 seasonal cycle amplification |
title_short |
COS-derived GPP relationships with temperature and light help explain high-latitude atmospheric CO2 seasonal cycle amplification |
title_full |
COS-derived GPP relationships with temperature and light help explain high-latitude atmospheric CO2 seasonal cycle amplification |
title_fullStr |
COS-derived GPP relationships with temperature and light help explain high-latitude atmospheric CO2 seasonal cycle amplification |
title_full_unstemmed |
COS-derived GPP relationships with temperature and light help explain high-latitude atmospheric CO2 seasonal cycle amplification |
title_sort |
cos-derived gpp relationships with temperature and light help explain high-latitude atmospheric co2 seasonal cycle amplification |
publishDate |
2021 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/81843/ https://doi.org/10.1073/pnas.2103423118 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Hu, Lei, Montzka, Stephen A., Kaushik, Aleya, Andrews, Arlyn E., Sweeney, Colm, Miller, John, Baker, Ian T., Denning, Scott, Campbell, Elliott, Shiga, Yoichi P., Tans, Pieter, Siso, M. Carolina, Crotwell, Molly, Mckain, Kathryn, Thoning, Kirk, Hall, Bradley, Vimont, Isaac, Elkins, James W., Whelan, Mary E. and Suntharalingam, Parvadha (2021) COS-derived GPP relationships with temperature and light help explain high-latitude atmospheric CO2 seasonal cycle amplification. Proceedings of the National Academy of Sciences of the United States of America (PNAS), 118 (33). ISSN 0027-8424 doi:10.1073/pnas.2103423118 |
op_doi |
https://doi.org/10.1073/pnas.2103423118 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
118 |
container_issue |
33 |
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1766342314528079872 |