Ocean-atmosphere exchange of organic carbon and CO2 surrounding the Antarctic Peninsula
Exchangeable organic carbon (OC) dynamics and CO2 fluxes in the Antarctic Peninsula during austral summer were highly variable, but the region appeared to be a net sink for OC and nearly in balance for CO2. Surface exchangeable dissolved organic carbon (EDOC) measurements had a 43±3 (standard error,...
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ftcsic:oai:digital.csic.es:10261/99455 2024-02-11T09:58:05+01:00 Ocean-atmosphere exchange of organic carbon and CO2 surrounding the Antarctic Peninsula Ruiz-Halpern, Sergio Calleja, Maria Ll. Dachs, Jordi Vento, Sabino del Pastor, Marcos Palmer, Miquel Agustí, Susana Duarte, Carlos M. 2014 http://hdl.handle.net/10261/99455 https://doi.org/10.5194/bg-11-2755-2014 unknown European Geosciences Union http://dx.doi.org/10.5194/bg-11-2755-2014 doi:10.5194/bg-11-2755-2014 issn: 1726-4189 Biogeosciences 11(10): 2755-2770 (2014) http://hdl.handle.net/10261/99455 open Solar radiation Dissolved organic carbon Crustacean Chlorophylla Carbon dioxide Carbon budgets Atmosphere-ocean coupling artículo http://purl.org/coar/resource_type/c_6501 2014 ftcsic https://doi.org/10.5194/bg-11-2755-2014 2024-01-16T09:59:57Z Exchangeable organic carbon (OC) dynamics and CO2 fluxes in the Antarctic Peninsula during austral summer were highly variable, but the region appeared to be a net sink for OC and nearly in balance for CO2. Surface exchangeable dissolved organic carbon (EDOC) measurements had a 43±3 (standard error, hereafter SE) μmol CL-1 overall mean and represented around 66% of surface non-purgeable dissolved organic carbon (DOC) in Antarctic waters, while the mean concentration of the gaseous fraction of organic carbon (GOCH′-1) was 46±3 SE μmol C L -1. There was a tendency towards low fugacity of dissolved CO 2 (fCO2-w) in waters with high chlorophyll a (Chl a) content and high fCO2-w in areas with high krill densities. However, such relationships were not found for EDOC. The depth profiles of EDOC were also quite variable and occasionally followed Chl a profiles. The diel cycles of EDOC showed two distinct peaks, in the middle of the day and the middle of the short austral dark period, concurrent with solar radiation maxima and krill night migration patterns. However, no evident diel pattern for GOC H′-1 or CO2 was observed. The pool of exchangeable OC is an important and active compartment of the carbon budget surrounding the Antarctic Peninsula and adds to previous studies highlighting its importance in the redistribution of carbon in marine environments. © Author(s) 2014. This is a contribution of both Aportes Atmosféricos de Carbono Orgánico y Contaminanates al océano Polar (ATOS) and the Spanish component of the Synoptic Antarctic Shelf-Slope Interactions study (ESASSI), funded by the Spanish Ministry of Science under the scope of the International Polar Year (IPY). Maria Ll. Calleja was funded by the Spanish Research Council (CSIC, grant JAEDOC030) and cofounded by the Fondo Social Europeo (FSO) Peer Reviewed Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula International Polar Year IPY Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Peninsula Austral The Antarctic Biogeosciences 11 10 2755 2770 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Solar radiation Dissolved organic carbon Crustacean Chlorophylla Carbon dioxide Carbon budgets Atmosphere-ocean coupling |
spellingShingle |
Solar radiation Dissolved organic carbon Crustacean Chlorophylla Carbon dioxide Carbon budgets Atmosphere-ocean coupling Ruiz-Halpern, Sergio Calleja, Maria Ll. Dachs, Jordi Vento, Sabino del Pastor, Marcos Palmer, Miquel Agustí, Susana Duarte, Carlos M. Ocean-atmosphere exchange of organic carbon and CO2 surrounding the Antarctic Peninsula |
topic_facet |
Solar radiation Dissolved organic carbon Crustacean Chlorophylla Carbon dioxide Carbon budgets Atmosphere-ocean coupling |
description |
Exchangeable organic carbon (OC) dynamics and CO2 fluxes in the Antarctic Peninsula during austral summer were highly variable, but the region appeared to be a net sink for OC and nearly in balance for CO2. Surface exchangeable dissolved organic carbon (EDOC) measurements had a 43±3 (standard error, hereafter SE) μmol CL-1 overall mean and represented around 66% of surface non-purgeable dissolved organic carbon (DOC) in Antarctic waters, while the mean concentration of the gaseous fraction of organic carbon (GOCH′-1) was 46±3 SE μmol C L -1. There was a tendency towards low fugacity of dissolved CO 2 (fCO2-w) in waters with high chlorophyll a (Chl a) content and high fCO2-w in areas with high krill densities. However, such relationships were not found for EDOC. The depth profiles of EDOC were also quite variable and occasionally followed Chl a profiles. The diel cycles of EDOC showed two distinct peaks, in the middle of the day and the middle of the short austral dark period, concurrent with solar radiation maxima and krill night migration patterns. However, no evident diel pattern for GOC H′-1 or CO2 was observed. The pool of exchangeable OC is an important and active compartment of the carbon budget surrounding the Antarctic Peninsula and adds to previous studies highlighting its importance in the redistribution of carbon in marine environments. © Author(s) 2014. This is a contribution of both Aportes Atmosféricos de Carbono Orgánico y Contaminanates al océano Polar (ATOS) and the Spanish component of the Synoptic Antarctic Shelf-Slope Interactions study (ESASSI), funded by the Spanish Ministry of Science under the scope of the International Polar Year (IPY). Maria Ll. Calleja was funded by the Spanish Research Council (CSIC, grant JAEDOC030) and cofounded by the Fondo Social Europeo (FSO) Peer Reviewed |
format |
Article in Journal/Newspaper |
author |
Ruiz-Halpern, Sergio Calleja, Maria Ll. Dachs, Jordi Vento, Sabino del Pastor, Marcos Palmer, Miquel Agustí, Susana Duarte, Carlos M. |
author_facet |
Ruiz-Halpern, Sergio Calleja, Maria Ll. Dachs, Jordi Vento, Sabino del Pastor, Marcos Palmer, Miquel Agustí, Susana Duarte, Carlos M. |
author_sort |
Ruiz-Halpern, Sergio |
title |
Ocean-atmosphere exchange of organic carbon and CO2 surrounding the Antarctic Peninsula |
title_short |
Ocean-atmosphere exchange of organic carbon and CO2 surrounding the Antarctic Peninsula |
title_full |
Ocean-atmosphere exchange of organic carbon and CO2 surrounding the Antarctic Peninsula |
title_fullStr |
Ocean-atmosphere exchange of organic carbon and CO2 surrounding the Antarctic Peninsula |
title_full_unstemmed |
Ocean-atmosphere exchange of organic carbon and CO2 surrounding the Antarctic Peninsula |
title_sort |
ocean-atmosphere exchange of organic carbon and co2 surrounding the antarctic peninsula |
publisher |
European Geosciences Union |
publishDate |
2014 |
url |
http://hdl.handle.net/10261/99455 https://doi.org/10.5194/bg-11-2755-2014 |
geographic |
Antarctic Antarctic Peninsula Austral The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Austral The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula International Polar Year IPY |
genre_facet |
Antarc* Antarctic Antarctic Peninsula International Polar Year IPY |
op_relation |
http://dx.doi.org/10.5194/bg-11-2755-2014 doi:10.5194/bg-11-2755-2014 issn: 1726-4189 Biogeosciences 11(10): 2755-2770 (2014) http://hdl.handle.net/10261/99455 |
op_rights |
open |
op_doi |
https://doi.org/10.5194/bg-11-2755-2014 |
container_title |
Biogeosciences |
container_volume |
11 |
container_issue |
10 |
container_start_page |
2755 |
op_container_end_page |
2770 |
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1790593656878530560 |