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 erro...
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ftsoutherncu:oai:epubs.scu.edu.au:esm_pubs-3416 2023-05-15T13:47:30+02:00 Ocean-atmosphere exchange of organic carbon and CO2 surrounding the Antarctic Peninsula Ruiz-Halpern, Sergio Calleja, M LI Dachs, J Del Vento, S Pastor, M Palmer, M Agusti, S Duarte, C M 2014-01-01T08:00:00Z https://epubs.scu.edu.au/esm_pubs/2404 https://doi.org/10.5194/bg-11-2755-2014 unknown ePublications@SCU School of Environment, Science and Engineering Papers Environmental Sciences article 2014 ftsoutherncu https://doi.org/10.5194/bg-11-2755-2014 2019-08-06T12:52:57Z 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 C L−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 (GOC H–1) was 46 ± 3 SE μmol C L−1. There was a tendency towards low fugacity of dissolved CO2 (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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Southern Cross University: epublications@SCU Antarctic The Antarctic Antarctic Peninsula Austral Biogeosciences 11 10 2755 2770 |
institution |
Open Polar |
collection |
Southern Cross University: epublications@SCU |
op_collection_id |
ftsoutherncu |
language |
unknown |
topic |
Environmental Sciences |
spellingShingle |
Environmental Sciences Ruiz-Halpern, Sergio Calleja, M LI Dachs, J Del Vento, S Pastor, M Palmer, M Agusti, S Duarte, C M Ocean-atmosphere exchange of organic carbon and CO2 surrounding the Antarctic Peninsula |
topic_facet |
Environmental Sciences |
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 C L−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 (GOC H–1) was 46 ± 3 SE μmol C L−1. There was a tendency towards low fugacity of dissolved CO2 (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. |
format |
Article in Journal/Newspaper |
author |
Ruiz-Halpern, Sergio Calleja, M LI Dachs, J Del Vento, S Pastor, M Palmer, M Agusti, S Duarte, C M |
author_facet |
Ruiz-Halpern, Sergio Calleja, M LI Dachs, J Del Vento, S Pastor, M Palmer, M Agusti, S Duarte, C 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 |
ePublications@SCU |
publishDate |
2014 |
url |
https://epubs.scu.edu.au/esm_pubs/2404 https://doi.org/10.5194/bg-11-2755-2014 |
geographic |
Antarctic The Antarctic Antarctic Peninsula Austral |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Austral |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_source |
School of Environment, Science and Engineering Papers |
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 |
_version_ |
1766247244821954560 |