On the causes of trends in the seasonal amplitude of atmospheric CO₂
No consensus has yet been reached on the major factors driving the observed increase in the seasonal amplitude of atmospheric CO₂ in the northern latitudes. In this study, we used atmospheric CO₂ records from 26 northern hemisphere stations with a temporal coverage longer than 15 years, and an atmos...
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ftuabarcelonapb:oai:ddd.uab.cat:189361 2023-10-29T02:34:20+01:00 On the causes of trends in the seasonal amplitude of atmospheric CO₂ Piao, Shilong Liu, Zhuo Wang, Yilong Ciais, Philippe Yao, Yitong Peng, Shushi Chevallier, Frédéric Friedlingstein, Pierre Janssens, Ivan Peñuelas, Josep Sitch, Stephen Wang, Tao 2018 application/pdf https://ddd.uab.cat/record/189361 eng eng European Commission 610028 Global change biology Vol. 24, issue 2 (Feb. 2018), p. 608-616 https://ddd.uab.cat/record/189361 urn:10.1111/gcb.13909 urn:oai:ddd.uab.cat:189361 urn:scopus_id:85031104057 urn:wos_id:000423994700034 urn:altmetric_id:25371275 urn:oai:egreta.uab.cat:publications/2f13f5eb-7d01-4e43-89ee-18de78712bbe open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ Amplitude of atmospheric CO₂ Attribution Climate change CO₂ fertilization effect Detection Land-use change Article 2018 ftuabarcelonapb 2023-10-03T23:55:06Z No consensus has yet been reached on the major factors driving the observed increase in the seasonal amplitude of atmospheric CO₂ in the northern latitudes. In this study, we used atmospheric CO₂ records from 26 northern hemisphere stations with a temporal coverage longer than 15 years, and an atmospheric transport model prescribed with net biome productivity (NBP) from an ensemble of nine terrestrial ecosystem models, to attribute change in the seasonal amplitude of atmospheric CO₂. We found significant (p < .05) increases in seasonal peak-to-trough CO₂ amplitude (AMPP-T) at nine stations, and in trough-to-peak amplitude (AMPT-P) at eight stations over the last three decades. Most of the stations that recorded increasing amplitudes are in Arctic and boreal regions (>50°N), consistent with previous observations that the amplitude increased faster at Barrow (Arctic) than at Mauna Loa (subtropics). The multi-model ensemble mean (MMEM) shows that the response of ecosystem carbon cycling to rising CO₂ concentration (eCO₂) and climate change are dominant drivers of the increase in AMPP-T and AMPT-P in the high latitudes. At the Barrow station, the observed increase of AMPP-T and AMPT-P over the last 33 years is explained by eCO₂ (39% and 42%) almost equally than by climate change (32% and 35%). The increased carbon losses during the months with a net carbon release in response to eCO₂ are associated with higher ecosystem respiration due to the increase in carbon storage caused by eCO₂ during carbon uptake period. Air-sea CO₂ fluxes (10% for AMPP-T and 11% for AMPT-P) and the impacts of land-use change (marginally significant 3% for AMPP-T and 4% for AMPT-P) also contributed to the CO₂ measured at Barrow, highlighting the role of these factors in regulating seasonal changes in the global carbon cycle. Article in Journal/Newspaper Arctic Climate change Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB Global Change Biology 24 2 608 616 |
institution |
Open Polar |
collection |
Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB |
op_collection_id |
ftuabarcelonapb |
language |
English |
topic |
Amplitude of atmospheric CO₂ Attribution Climate change CO₂ fertilization effect Detection Land-use change |
spellingShingle |
Amplitude of atmospheric CO₂ Attribution Climate change CO₂ fertilization effect Detection Land-use change Piao, Shilong Liu, Zhuo Wang, Yilong Ciais, Philippe Yao, Yitong Peng, Shushi Chevallier, Frédéric Friedlingstein, Pierre Janssens, Ivan Peñuelas, Josep Sitch, Stephen Wang, Tao On the causes of trends in the seasonal amplitude of atmospheric CO₂ |
topic_facet |
Amplitude of atmospheric CO₂ Attribution Climate change CO₂ fertilization effect Detection Land-use change |
description |
No consensus has yet been reached on the major factors driving the observed increase in the seasonal amplitude of atmospheric CO₂ in the northern latitudes. In this study, we used atmospheric CO₂ records from 26 northern hemisphere stations with a temporal coverage longer than 15 years, and an atmospheric transport model prescribed with net biome productivity (NBP) from an ensemble of nine terrestrial ecosystem models, to attribute change in the seasonal amplitude of atmospheric CO₂. We found significant (p < .05) increases in seasonal peak-to-trough CO₂ amplitude (AMPP-T) at nine stations, and in trough-to-peak amplitude (AMPT-P) at eight stations over the last three decades. Most of the stations that recorded increasing amplitudes are in Arctic and boreal regions (>50°N), consistent with previous observations that the amplitude increased faster at Barrow (Arctic) than at Mauna Loa (subtropics). The multi-model ensemble mean (MMEM) shows that the response of ecosystem carbon cycling to rising CO₂ concentration (eCO₂) and climate change are dominant drivers of the increase in AMPP-T and AMPT-P in the high latitudes. At the Barrow station, the observed increase of AMPP-T and AMPT-P over the last 33 years is explained by eCO₂ (39% and 42%) almost equally than by climate change (32% and 35%). The increased carbon losses during the months with a net carbon release in response to eCO₂ are associated with higher ecosystem respiration due to the increase in carbon storage caused by eCO₂ during carbon uptake period. Air-sea CO₂ fluxes (10% for AMPP-T and 11% for AMPT-P) and the impacts of land-use change (marginally significant 3% for AMPP-T and 4% for AMPT-P) also contributed to the CO₂ measured at Barrow, highlighting the role of these factors in regulating seasonal changes in the global carbon cycle. |
format |
Article in Journal/Newspaper |
author |
Piao, Shilong Liu, Zhuo Wang, Yilong Ciais, Philippe Yao, Yitong Peng, Shushi Chevallier, Frédéric Friedlingstein, Pierre Janssens, Ivan Peñuelas, Josep Sitch, Stephen Wang, Tao |
author_facet |
Piao, Shilong Liu, Zhuo Wang, Yilong Ciais, Philippe Yao, Yitong Peng, Shushi Chevallier, Frédéric Friedlingstein, Pierre Janssens, Ivan Peñuelas, Josep Sitch, Stephen Wang, Tao |
author_sort |
Piao, Shilong |
title |
On the causes of trends in the seasonal amplitude of atmospheric CO₂ |
title_short |
On the causes of trends in the seasonal amplitude of atmospheric CO₂ |
title_full |
On the causes of trends in the seasonal amplitude of atmospheric CO₂ |
title_fullStr |
On the causes of trends in the seasonal amplitude of atmospheric CO₂ |
title_full_unstemmed |
On the causes of trends in the seasonal amplitude of atmospheric CO₂ |
title_sort |
on the causes of trends in the seasonal amplitude of atmospheric co₂ |
publishDate |
2018 |
url |
https://ddd.uab.cat/record/189361 |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_relation |
European Commission 610028 Global change biology Vol. 24, issue 2 (Feb. 2018), p. 608-616 https://ddd.uab.cat/record/189361 urn:10.1111/gcb.13909 urn:oai:ddd.uab.cat:189361 urn:scopus_id:85031104057 urn:wos_id:000423994700034 urn:altmetric_id:25371275 urn:oai:egreta.uab.cat:publications/2f13f5eb-7d01-4e43-89ee-18de78712bbe |
op_rights |
open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ |
container_title |
Global Change Biology |
container_volume |
24 |
container_issue |
2 |
container_start_page |
608 |
op_container_end_page |
616 |
_version_ |
1781056852199473152 |