Twentieth-century oceanic carbon uptake and storage in CESM1(BGC)
Ocean carbon uptake and storage simulated by the Community Earth System Model, version 1-Biogeochemistry [CESM1(BGC)], is described and compared to observations. Fully coupled and ocean-ice configurations are examined; both capture many aspects of the spatial structure and seasonality of surface car...
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Language: | English |
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ftcdlib:qt8nx715w3 2023-05-15T17:31:09+02:00 Twentieth-century oceanic carbon uptake and storage in CESM1(BGC) Long, MC Lindsay, K Peacock, S Moore, JK Doney, SC 6775 - 6800 2013-01-01 application/pdf http://www.escholarship.org/uc/item/8nx715w3 english eng eScholarship, University of California qt8nx715w3 http://www.escholarship.org/uc/item/8nx715w3 Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Long, MC; Lindsay, K; Peacock, S; Moore, JK; & Doney, SC. (2013). Twentieth-century oceanic carbon uptake and storage in CESM1(BGC). Journal of Climate, 26(18), 6775 - 6800. doi:10.1175/JCLI-D-12-00184.1. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/8nx715w3 article 2013 ftcdlib https://doi.org/10.1175/JCLI-D-12-00184.1 2018-07-06T22:52:06Z Ocean carbon uptake and storage simulated by the Community Earth System Model, version 1-Biogeochemistry [CESM1(BGC)], is described and compared to observations. Fully coupled and ocean-ice configurations are examined; both capture many aspects of the spatial structure and seasonality of surface carbon fields. Nearly ubiquitous negative biases in surface alkalinity result from the prescribed carbonate dissolution profile. The modeled sea-air CO2fluxes match observationally based estimates over much of the ocean; significant deviations appear in the Southern Ocean. Surface ocean pCO2is biased high in the subantarctic and low in the sea ice zone. Formation of the water masses dominating anthropogenic CO2(Cant) uptake in the Southern Hemisphere is weak in the model, leading to significant negative biases in Cant and chlorofluorocarbon (CFC) storage at intermediate depths. Column inventories of Cant appear too high, by contrast, in the North Atlantic. In spite of the positive bias, this marks an improvement over prior versions of the model, which underestimated North Atlantic uptake. The change in behavior is attributable to a new parameterization of density-driven overflows. CESM1(BGC) provides a relatively robust representation of the ocean-carbon cycle response to climate variability. Statistical metrics of modeled interannual variability in sea-air CO2fluxes compare reasonably well to observationally based estimates. The carbon cycle response to key modes of climate variability is basically similar in the coupled and forced ocean-ice models; however, the two differ in regional detail and in the strength of teleconnections. © 2013 American Meteorological Society. Article in Journal/Newspaper North Atlantic Sea ice Southern Ocean University of California: eScholarship Southern Ocean Journal of Climate 26 18 6775 6800 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
description |
Ocean carbon uptake and storage simulated by the Community Earth System Model, version 1-Biogeochemistry [CESM1(BGC)], is described and compared to observations. Fully coupled and ocean-ice configurations are examined; both capture many aspects of the spatial structure and seasonality of surface carbon fields. Nearly ubiquitous negative biases in surface alkalinity result from the prescribed carbonate dissolution profile. The modeled sea-air CO2fluxes match observationally based estimates over much of the ocean; significant deviations appear in the Southern Ocean. Surface ocean pCO2is biased high in the subantarctic and low in the sea ice zone. Formation of the water masses dominating anthropogenic CO2(Cant) uptake in the Southern Hemisphere is weak in the model, leading to significant negative biases in Cant and chlorofluorocarbon (CFC) storage at intermediate depths. Column inventories of Cant appear too high, by contrast, in the North Atlantic. In spite of the positive bias, this marks an improvement over prior versions of the model, which underestimated North Atlantic uptake. The change in behavior is attributable to a new parameterization of density-driven overflows. CESM1(BGC) provides a relatively robust representation of the ocean-carbon cycle response to climate variability. Statistical metrics of modeled interannual variability in sea-air CO2fluxes compare reasonably well to observationally based estimates. The carbon cycle response to key modes of climate variability is basically similar in the coupled and forced ocean-ice models; however, the two differ in regional detail and in the strength of teleconnections. © 2013 American Meteorological Society. |
format |
Article in Journal/Newspaper |
author |
Long, MC Lindsay, K Peacock, S Moore, JK Doney, SC |
spellingShingle |
Long, MC Lindsay, K Peacock, S Moore, JK Doney, SC Twentieth-century oceanic carbon uptake and storage in CESM1(BGC) |
author_facet |
Long, MC Lindsay, K Peacock, S Moore, JK Doney, SC |
author_sort |
Long, MC |
title |
Twentieth-century oceanic carbon uptake and storage in CESM1(BGC) |
title_short |
Twentieth-century oceanic carbon uptake and storage in CESM1(BGC) |
title_full |
Twentieth-century oceanic carbon uptake and storage in CESM1(BGC) |
title_fullStr |
Twentieth-century oceanic carbon uptake and storage in CESM1(BGC) |
title_full_unstemmed |
Twentieth-century oceanic carbon uptake and storage in CESM1(BGC) |
title_sort |
twentieth-century oceanic carbon uptake and storage in cesm1(bgc) |
publisher |
eScholarship, University of California |
publishDate |
2013 |
url |
http://www.escholarship.org/uc/item/8nx715w3 |
op_coverage |
6775 - 6800 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
North Atlantic Sea ice Southern Ocean |
genre_facet |
North Atlantic Sea ice Southern Ocean |
op_source |
Long, MC; Lindsay, K; Peacock, S; Moore, JK; & Doney, SC. (2013). Twentieth-century oceanic carbon uptake and storage in CESM1(BGC). Journal of Climate, 26(18), 6775 - 6800. doi:10.1175/JCLI-D-12-00184.1. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/8nx715w3 |
op_relation |
qt8nx715w3 http://www.escholarship.org/uc/item/8nx715w3 |
op_rights |
Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1175/JCLI-D-12-00184.1 |
container_title |
Journal of Climate |
container_volume |
26 |
container_issue |
18 |
container_start_page |
6775 |
op_container_end_page |
6800 |
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1766128487575322624 |