A survey of carbon monoxide and non-methane hydrocarbons in the Arctic Ocean during summer 2010
During the ARK XXV 1 + 2 expedition in the Arctic Ocean carried out in June–July 2010 aboard the R/V Polarstern, we measured carbon monoxide (CO), non-methane hydrocarbons (NMHC) and phytoplankton pigments at the sea surface and down to a depth of 100 m. The CO and NMHC sea-surface concentrations we...
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Copernicus Publications
2013
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00023109 2023-05-15T14:56:40+02:00 A survey of carbon monoxide and non-methane hydrocarbons in the Arctic Ocean during summer 2010 Tran, S. Bonsang, B. Gros, V. Peeken, I. Sarda-Esteve, R. Bernhardt, A. Belviso, S. 2013-03 electronic https://doi.org/10.5194/bg-10-1909-2013 https://noa.gwlb.de/receive/cop_mods_00023109 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023064/bg-10-1909-2013.pdf https://bg.copernicus.org/articles/10/1909/2013/bg-10-1909-2013.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-10-1909-2013 https://noa.gwlb.de/receive/cop_mods_00023109 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023064/bg-10-1909-2013.pdf https://bg.copernicus.org/articles/10/1909/2013/bg-10-1909-2013.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2013 ftnonlinearchiv https://doi.org/10.5194/bg-10-1909-2013 2022-02-08T22:50:47Z During the ARK XXV 1 + 2 expedition in the Arctic Ocean carried out in June–July 2010 aboard the R/V Polarstern, we measured carbon monoxide (CO), non-methane hydrocarbons (NMHC) and phytoplankton pigments at the sea surface and down to a depth of 100 m. The CO and NMHC sea-surface concentrations were highly variable; CO, propene and isoprene levels ranged from 0.6 to 17.5 nmol L−1, 1 to 322 pmol L−1 and 1 to 541 pmol L−1, respectively. The CO and alkene concentrations as well as their sea–air fluxes were enhanced in polar waters off of Greenland, which were more stratified because of ice melting and richer in chromophoric dissolved organic matter (CDOM) than typical North Atlantic waters. The spatial distribution of the surface concentrations of CO was consistent with our current understanding of CO-induced UV photoproduction in the sea. The vertical distributions of the CO and alkenes were comparable and followed the trend of light penetration, with the concentrations displaying a relatively regular exponential decrease down to non-measurable values below 50 m. However, no diurnal variations of CO or alkene concentrations were observed in the stratified and irradiated surface layers. On several occasions, we observed the existence of subsurface CO maxima at the level of the deep chlorophyll maximum. This finding suggests the existence of a non-photochemical CO production pathway, most likely of phytoplanktonic origin. The corresponding production rates normalized to the chlorophyll content were in the range of those estimated from laboratory experiments. In general, the vertical distributions of isoprene followed that of the phytoplankton biomass. These data support the existence of a dominant photochemical source of CO and light alkenes enhanced in polar waters of the Arctic Ocean, with a minor contribution of a biological source of CO. The biological source of isoprene is observed in the different water masses but significantly increases in the warmer Atlantic waters. Article in Journal/Newspaper Arctic Arctic Ocean Greenland North Atlantic Phytoplankton Niedersächsisches Online-Archiv NOA Arctic Arctic Ocean Greenland The Ark ENVELOPE(-24.789,-24.789,-80.691,-80.691) Biogeosciences 10 3 1909 1935 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Tran, S. Bonsang, B. Gros, V. Peeken, I. Sarda-Esteve, R. Bernhardt, A. Belviso, S. A survey of carbon monoxide and non-methane hydrocarbons in the Arctic Ocean during summer 2010 |
topic_facet |
article Verlagsveröffentlichung |
description |
During the ARK XXV 1 + 2 expedition in the Arctic Ocean carried out in June–July 2010 aboard the R/V Polarstern, we measured carbon monoxide (CO), non-methane hydrocarbons (NMHC) and phytoplankton pigments at the sea surface and down to a depth of 100 m. The CO and NMHC sea-surface concentrations were highly variable; CO, propene and isoprene levels ranged from 0.6 to 17.5 nmol L−1, 1 to 322 pmol L−1 and 1 to 541 pmol L−1, respectively. The CO and alkene concentrations as well as their sea–air fluxes were enhanced in polar waters off of Greenland, which were more stratified because of ice melting and richer in chromophoric dissolved organic matter (CDOM) than typical North Atlantic waters. The spatial distribution of the surface concentrations of CO was consistent with our current understanding of CO-induced UV photoproduction in the sea. The vertical distributions of the CO and alkenes were comparable and followed the trend of light penetration, with the concentrations displaying a relatively regular exponential decrease down to non-measurable values below 50 m. However, no diurnal variations of CO or alkene concentrations were observed in the stratified and irradiated surface layers. On several occasions, we observed the existence of subsurface CO maxima at the level of the deep chlorophyll maximum. This finding suggests the existence of a non-photochemical CO production pathway, most likely of phytoplanktonic origin. The corresponding production rates normalized to the chlorophyll content were in the range of those estimated from laboratory experiments. In general, the vertical distributions of isoprene followed that of the phytoplankton biomass. These data support the existence of a dominant photochemical source of CO and light alkenes enhanced in polar waters of the Arctic Ocean, with a minor contribution of a biological source of CO. The biological source of isoprene is observed in the different water masses but significantly increases in the warmer Atlantic waters. |
format |
Article in Journal/Newspaper |
author |
Tran, S. Bonsang, B. Gros, V. Peeken, I. Sarda-Esteve, R. Bernhardt, A. Belviso, S. |
author_facet |
Tran, S. Bonsang, B. Gros, V. Peeken, I. Sarda-Esteve, R. Bernhardt, A. Belviso, S. |
author_sort |
Tran, S. |
title |
A survey of carbon monoxide and non-methane hydrocarbons in the Arctic Ocean during summer 2010 |
title_short |
A survey of carbon monoxide and non-methane hydrocarbons in the Arctic Ocean during summer 2010 |
title_full |
A survey of carbon monoxide and non-methane hydrocarbons in the Arctic Ocean during summer 2010 |
title_fullStr |
A survey of carbon monoxide and non-methane hydrocarbons in the Arctic Ocean during summer 2010 |
title_full_unstemmed |
A survey of carbon monoxide and non-methane hydrocarbons in the Arctic Ocean during summer 2010 |
title_sort |
survey of carbon monoxide and non-methane hydrocarbons in the arctic ocean during summer 2010 |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/bg-10-1909-2013 https://noa.gwlb.de/receive/cop_mods_00023109 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023064/bg-10-1909-2013.pdf https://bg.copernicus.org/articles/10/1909/2013/bg-10-1909-2013.pdf |
long_lat |
ENVELOPE(-24.789,-24.789,-80.691,-80.691) |
geographic |
Arctic Arctic Ocean Greenland The Ark |
geographic_facet |
Arctic Arctic Ocean Greenland The Ark |
genre |
Arctic Arctic Ocean Greenland North Atlantic Phytoplankton |
genre_facet |
Arctic Arctic Ocean Greenland North Atlantic Phytoplankton |
op_relation |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-10-1909-2013 https://noa.gwlb.de/receive/cop_mods_00023109 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023064/bg-10-1909-2013.pdf https://bg.copernicus.org/articles/10/1909/2013/bg-10-1909-2013.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-10-1909-2013 |
container_title |
Biogeosciences |
container_volume |
10 |
container_issue |
3 |
container_start_page |
1909 |
op_container_end_page |
1935 |
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1766328748562448384 |