Accelerating carbon uptake in the Northern Hemisphere: evidence from the interhemispheric difference of atmospheric CO2 concentrations
Previous studies have indicated that the regression slope between the interhemispheric difference (IHD) of CO2 mixing ratios and fossil fuel (FF) CO2 emissions was rather constant at about 0.5 ppm/Pg C yr−1 during 1957–2003. In this study, we found that the average r...
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ftdoajarticles:oai:doaj.org/article:2b5f4983a9404298a611aa255a044c52 2023-05-15T18:23:20+02:00 Accelerating carbon uptake in the Northern Hemisphere: evidence from the interhemispheric difference of atmospheric CO2 concentrations Yuxuan Wang Mingwei Li Lulu Shen 2013-11-01T00:00:00Z https://doi.org/10.3402/tellusb.v65i0.20334 https://doaj.org/article/2b5f4983a9404298a611aa255a044c52 EN eng Stockholm University Press http://www.tellusb.net/index.php/tellusb/article/download/20334/pdf_1 https://doaj.org/toc/1600-0889 doi:10.3402/tellusb.v65i0.20334 1600-0889 https://doaj.org/article/2b5f4983a9404298a611aa255a044c52 Tellus: Series B, Chemical and Physical Meteorology, Vol 65, Iss 0, Pp 1-16 (2013) CO2 interhemispheric difference carbon uptake carbon sink fossil fuel emissions interhemispheric exchange Meteorology. Climatology QC851-999 article 2013 ftdoajarticles https://doi.org/10.3402/tellusb.v65i0.20334 2022-12-31T01:40:00Z Previous studies have indicated that the regression slope between the interhemispheric difference (IHD) of CO2 mixing ratios and fossil fuel (FF) CO2 emissions was rather constant at about 0.5 ppm/Pg C yr−1 during 1957–2003. In this study, we found that the average regression slopes between the IHD of CO2 mixing ratios and IHD of FF emissions for 16 sites in the Northern Hemisphere (NH) decreased from 0.69±0.12 ppm/Pg C yr−1 during 1982–1991 to 0.37±0.06 ppm/Pg C yr−1 during 1996–2008 (IHD of CO2 defined as the differences between each site and the South Pole, SPO). The largest difference was found in summer and autumn. The change in the spatial distribution of FF emissions driven by fast increasing Asian emissions may explain the slope change at three sites located north of 60°N but not at the other sites. A 30-yr SF6 simulation with time-varying meteorology and constant emissions suggests no significant difference in the decadal average and seasonal variation of interhemispheric exchange time (τ ex) between the two periods. Based on the hemispheric net carbon fluxes derived from a two-box model, we attributed 75% of the regression slope decrease at NH sites south of 60°N to the acceleration of net carbon sink increase in the NH and 25% to the weakening of net carbon sink increase in the SH during 1996–2008. The growth rate of net carbon sink in the NH has increased by a factor of about three from 0.028±0.023 [mean±2σ] Pg C yr−2 during 1982–1991 to 0.093±0.033 Pg C yr−2 during 1996–2008, exceeding the percentage increase in the growth rate of IHD of FF emissions between the two periods (45%). The growth rate of net carbon sink in the SH has reduced 62% from 0.058±0.018 Pg C yr−2 during 1982–1991 to ... Article in Journal/Newspaper South pole Directory of Open Access Journals: DOAJ Articles South Pole Tellus B: Chemical and Physical Meteorology 65 1 20334 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
CO2 interhemispheric difference carbon uptake carbon sink fossil fuel emissions interhemispheric exchange Meteorology. Climatology QC851-999 |
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CO2 interhemispheric difference carbon uptake carbon sink fossil fuel emissions interhemispheric exchange Meteorology. Climatology QC851-999 Yuxuan Wang Mingwei Li Lulu Shen Accelerating carbon uptake in the Northern Hemisphere: evidence from the interhemispheric difference of atmospheric CO2 concentrations |
topic_facet |
CO2 interhemispheric difference carbon uptake carbon sink fossil fuel emissions interhemispheric exchange Meteorology. Climatology QC851-999 |
description |
Previous studies have indicated that the regression slope between the interhemispheric difference (IHD) of CO2 mixing ratios and fossil fuel (FF) CO2 emissions was rather constant at about 0.5 ppm/Pg C yr−1 during 1957–2003. In this study, we found that the average regression slopes between the IHD of CO2 mixing ratios and IHD of FF emissions for 16 sites in the Northern Hemisphere (NH) decreased from 0.69±0.12 ppm/Pg C yr−1 during 1982–1991 to 0.37±0.06 ppm/Pg C yr−1 during 1996–2008 (IHD of CO2 defined as the differences between each site and the South Pole, SPO). The largest difference was found in summer and autumn. The change in the spatial distribution of FF emissions driven by fast increasing Asian emissions may explain the slope change at three sites located north of 60°N but not at the other sites. A 30-yr SF6 simulation with time-varying meteorology and constant emissions suggests no significant difference in the decadal average and seasonal variation of interhemispheric exchange time (τ ex) between the two periods. Based on the hemispheric net carbon fluxes derived from a two-box model, we attributed 75% of the regression slope decrease at NH sites south of 60°N to the acceleration of net carbon sink increase in the NH and 25% to the weakening of net carbon sink increase in the SH during 1996–2008. The growth rate of net carbon sink in the NH has increased by a factor of about three from 0.028±0.023 [mean±2σ] Pg C yr−2 during 1982–1991 to 0.093±0.033 Pg C yr−2 during 1996–2008, exceeding the percentage increase in the growth rate of IHD of FF emissions between the two periods (45%). The growth rate of net carbon sink in the SH has reduced 62% from 0.058±0.018 Pg C yr−2 during 1982–1991 to ... |
format |
Article in Journal/Newspaper |
author |
Yuxuan Wang Mingwei Li Lulu Shen |
author_facet |
Yuxuan Wang Mingwei Li Lulu Shen |
author_sort |
Yuxuan Wang |
title |
Accelerating carbon uptake in the Northern Hemisphere: evidence from the interhemispheric difference of atmospheric CO2 concentrations |
title_short |
Accelerating carbon uptake in the Northern Hemisphere: evidence from the interhemispheric difference of atmospheric CO2 concentrations |
title_full |
Accelerating carbon uptake in the Northern Hemisphere: evidence from the interhemispheric difference of atmospheric CO2 concentrations |
title_fullStr |
Accelerating carbon uptake in the Northern Hemisphere: evidence from the interhemispheric difference of atmospheric CO2 concentrations |
title_full_unstemmed |
Accelerating carbon uptake in the Northern Hemisphere: evidence from the interhemispheric difference of atmospheric CO2 concentrations |
title_sort |
accelerating carbon uptake in the northern hemisphere: evidence from the interhemispheric difference of atmospheric co2 concentrations |
publisher |
Stockholm University Press |
publishDate |
2013 |
url |
https://doi.org/10.3402/tellusb.v65i0.20334 https://doaj.org/article/2b5f4983a9404298a611aa255a044c52 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
Tellus: Series B, Chemical and Physical Meteorology, Vol 65, Iss 0, Pp 1-16 (2013) |
op_relation |
http://www.tellusb.net/index.php/tellusb/article/download/20334/pdf_1 https://doaj.org/toc/1600-0889 doi:10.3402/tellusb.v65i0.20334 1600-0889 https://doaj.org/article/2b5f4983a9404298a611aa255a044c52 |
op_doi |
https://doi.org/10.3402/tellusb.v65i0.20334 |
container_title |
Tellus B: Chemical and Physical Meteorology |
container_volume |
65 |
container_issue |
1 |
container_start_page |
20334 |
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1766202905866534912 |