Variability of primary production and air-sea CO 2 flux in the Southern Ocean
Biogeochemical cycling in the Southern Ocean (SO) plays a key role in the global sea-air CO2balance and in the ocean anthropogenic carbon inventory (Ito et al., 2010; Khatiwala et al., 2009; Sarmiento et al., 2004). Some previous studies suggest a decreasing trend in the Southern Ocean carbon sink (...
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Language: | English |
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ftcdlib:qt10z7570v 2023-05-15T13:32:39+02:00 Variability of primary production and air-sea CO 2 flux in the Southern Ocean Wang, Shanlin Moore, J. Keith n/a - n/a 2012-03-01 application/pdf http://www.escholarship.org/uc/item/10z7570v english eng eScholarship, University of California qt10z7570v http://www.escholarship.org/uc/item/10z7570v Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Wang, Shanlin; & Moore, J. Keith. (2012). Variability of primary production and air-sea CO 2 flux in the Southern Ocean. Global Biogeochemical Cycles, 26(1), n/a - n/a. doi:10.1029/2010GB003981. UC Irvine: Department of Earth System Science, UCI. Retrieved from: http://www.escholarship.org/uc/item/10z7570v Physical Sciences and Mathematics western antarctic peninsula large-scale circulation recent climate-change ice zone west ross sea phytoplankton bloom kerguelen plateau interannual variability community structure iron fertilization article 2012 ftcdlib https://doi.org/10.1029/2010GB003981 2016-04-02T19:00:43Z Biogeochemical cycling in the Southern Ocean (SO) plays a key role in the global sea-air CO2balance and in the ocean anthropogenic carbon inventory (Ito et al., 2010; Khatiwala et al., 2009; Sarmiento et al., 2004). Some previous studies suggest a decreasing trend in the Southern Ocean carbon sink (Le Quéré et al., 2007; Lovenduski et al., 2007; Wetzel et al., 2005). We investigate the interannual and decadal variations in sea-air CO2flux and phytoplankton production in the SO with hindcast simulations by an ocean biogeochemical model. Decreasing trends in sinking POC and primary production are found from 1979 to 2003, concurrent with a decreasing trend in carbon uptake from the atmosphere. Simulations show substantial interannual and decadal variability in productivity. The sea-air CO2flux is significantly correlated with sinking POC, especially in high productivity regions of the Southern Ocean. Both mixed layer depths and iron concentrations are important to the long-term trends in production and phytoplankton community structure. Sea ice cover also plays an important role at high latitudes. Variability in dust deposition in recent decades has little influence on total SO productivity and carbon uptake, however, there are regional impacts near dust source regions. Accurately representing mixed layer depths and their impacts on phytoplankton light stress are critical for understanding how climate change impacts SO ecosystems and biogeochemistry. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ross Sea Sea ice Southern Ocean University of California: eScholarship Antarctic Antarctic Peninsula Kerguelen Ross Sea Sarmiento ENVELOPE(-68.000,-68.000,-72.000,-72.000) Southern Ocean Global Biogeochemical Cycles 26 1 n/a n/a |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
topic |
Physical Sciences and Mathematics western antarctic peninsula large-scale circulation recent climate-change ice zone west ross sea phytoplankton bloom kerguelen plateau interannual variability community structure iron fertilization |
spellingShingle |
Physical Sciences and Mathematics western antarctic peninsula large-scale circulation recent climate-change ice zone west ross sea phytoplankton bloom kerguelen plateau interannual variability community structure iron fertilization Wang, Shanlin Moore, J. Keith Variability of primary production and air-sea CO 2 flux in the Southern Ocean |
topic_facet |
Physical Sciences and Mathematics western antarctic peninsula large-scale circulation recent climate-change ice zone west ross sea phytoplankton bloom kerguelen plateau interannual variability community structure iron fertilization |
description |
Biogeochemical cycling in the Southern Ocean (SO) plays a key role in the global sea-air CO2balance and in the ocean anthropogenic carbon inventory (Ito et al., 2010; Khatiwala et al., 2009; Sarmiento et al., 2004). Some previous studies suggest a decreasing trend in the Southern Ocean carbon sink (Le Quéré et al., 2007; Lovenduski et al., 2007; Wetzel et al., 2005). We investigate the interannual and decadal variations in sea-air CO2flux and phytoplankton production in the SO with hindcast simulations by an ocean biogeochemical model. Decreasing trends in sinking POC and primary production are found from 1979 to 2003, concurrent with a decreasing trend in carbon uptake from the atmosphere. Simulations show substantial interannual and decadal variability in productivity. The sea-air CO2flux is significantly correlated with sinking POC, especially in high productivity regions of the Southern Ocean. Both mixed layer depths and iron concentrations are important to the long-term trends in production and phytoplankton community structure. Sea ice cover also plays an important role at high latitudes. Variability in dust deposition in recent decades has little influence on total SO productivity and carbon uptake, however, there are regional impacts near dust source regions. Accurately representing mixed layer depths and their impacts on phytoplankton light stress are critical for understanding how climate change impacts SO ecosystems and biogeochemistry. |
format |
Article in Journal/Newspaper |
author |
Wang, Shanlin Moore, J. Keith |
author_facet |
Wang, Shanlin Moore, J. Keith |
author_sort |
Wang, Shanlin |
title |
Variability of primary production and air-sea CO 2 flux in the Southern Ocean |
title_short |
Variability of primary production and air-sea CO 2 flux in the Southern Ocean |
title_full |
Variability of primary production and air-sea CO 2 flux in the Southern Ocean |
title_fullStr |
Variability of primary production and air-sea CO 2 flux in the Southern Ocean |
title_full_unstemmed |
Variability of primary production and air-sea CO 2 flux in the Southern Ocean |
title_sort |
variability of primary production and air-sea co 2 flux in the southern ocean |
publisher |
eScholarship, University of California |
publishDate |
2012 |
url |
http://www.escholarship.org/uc/item/10z7570v |
op_coverage |
n/a - n/a |
long_lat |
ENVELOPE(-68.000,-68.000,-72.000,-72.000) |
geographic |
Antarctic Antarctic Peninsula Kerguelen Ross Sea Sarmiento Southern Ocean |
geographic_facet |
Antarctic Antarctic Peninsula Kerguelen Ross Sea Sarmiento Southern Ocean |
genre |
Antarc* Antarctic Antarctic Peninsula Ross Sea Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ross Sea Sea ice Southern Ocean |
op_source |
Wang, Shanlin; & Moore, J. Keith. (2012). Variability of primary production and air-sea CO 2 flux in the Southern Ocean. Global Biogeochemical Cycles, 26(1), n/a - n/a. doi:10.1029/2010GB003981. UC Irvine: Department of Earth System Science, UCI. Retrieved from: http://www.escholarship.org/uc/item/10z7570v |
op_relation |
qt10z7570v http://www.escholarship.org/uc/item/10z7570v |
op_rights |
Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2010GB003981 |
container_title |
Global Biogeochemical Cycles |
container_volume |
26 |
container_issue |
1 |
container_start_page |
n/a |
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n/a |
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1766028953425805312 |