Ship-based measurement of air-sea CO2exchange by eddy covariance
A system for the shipboard measurement of air-sea CO2 fluxes by eddy covariance was developed and tested. The system was designed to reduce two major sources of experimental uncertainty previously reported. First, the correction for in situ water vapor fluctuations (the “Webb” correction) was reduce...
Published in: | Journal of Geophysical Research |
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Language: | English |
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AGU (American Geophysical Union)
2010
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Online Access: | https://oceanrep.geomar.de/id/eprint/10680/ https://oceanrep.geomar.de/id/eprint/10680/1/2009JD012193.pdf https://doi.org/10.1029/2009JD012193 |
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ftoceanrep:oai:oceanrep.geomar.de:10680 2023-05-15T17:32:56+02:00 Ship-based measurement of air-sea CO2exchange by eddy covariance Miller, Scott D. Marandino, Christa Saltzman, Eric S. 2010 text https://oceanrep.geomar.de/id/eprint/10680/ https://oceanrep.geomar.de/id/eprint/10680/1/2009JD012193.pdf https://doi.org/10.1029/2009JD012193 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/10680/1/2009JD012193.pdf Miller, S. D., Marandino, C. and Saltzman, E. S. (2010) Ship-based measurement of air-sea CO2exchange by eddy covariance. Open Access Journal of Geophysical Research: Atmospheres, 115 (D2). D02304. DOI 10.1029/2009JD012193 <https://doi.org/10.1029/2009JD012193>. doi:10.1029/2009JD012193 info:eu-repo/semantics/openAccess Article PeerReviewed 2010 ftoceanrep https://doi.org/10.1029/2009JD012193 2023-04-07T14:58:58Z A system for the shipboard measurement of air-sea CO2 fluxes by eddy covariance was developed and tested. The system was designed to reduce two major sources of experimental uncertainty previously reported. First, the correction for in situ water vapor fluctuations (the “Webb” correction) was reduced by 97% by drying the air sample stream. Second, motion sensitivity of the gas analyzer was reduced by using an open-path type sensor that was converted to a closed-path configuration to facilitate drying of the air stream. High-quality CO2 fluxes were obtained during 429 14 min flux intervals during two cruises in the North Atlantic. The results suggest that the gas analyzer resolved atmospheric CO2 fluctuations well below its RMS noise level. This noise was uncorrelated with the vertical wind and therefore filtered out by the flux calculation. Using climatological data, we estimate that the techniques reported here could enable high-quality measurements of air-sea CO2 flux over much of the world oceans. Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Webb ENVELOPE(146.867,146.867,-67.867,-67.867) Journal of Geophysical Research 115 D2 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
A system for the shipboard measurement of air-sea CO2 fluxes by eddy covariance was developed and tested. The system was designed to reduce two major sources of experimental uncertainty previously reported. First, the correction for in situ water vapor fluctuations (the “Webb” correction) was reduced by 97% by drying the air sample stream. Second, motion sensitivity of the gas analyzer was reduced by using an open-path type sensor that was converted to a closed-path configuration to facilitate drying of the air stream. High-quality CO2 fluxes were obtained during 429 14 min flux intervals during two cruises in the North Atlantic. The results suggest that the gas analyzer resolved atmospheric CO2 fluctuations well below its RMS noise level. This noise was uncorrelated with the vertical wind and therefore filtered out by the flux calculation. Using climatological data, we estimate that the techniques reported here could enable high-quality measurements of air-sea CO2 flux over much of the world oceans. |
format |
Article in Journal/Newspaper |
author |
Miller, Scott D. Marandino, Christa Saltzman, Eric S. |
spellingShingle |
Miller, Scott D. Marandino, Christa Saltzman, Eric S. Ship-based measurement of air-sea CO2exchange by eddy covariance |
author_facet |
Miller, Scott D. Marandino, Christa Saltzman, Eric S. |
author_sort |
Miller, Scott D. |
title |
Ship-based measurement of air-sea CO2exchange by eddy covariance |
title_short |
Ship-based measurement of air-sea CO2exchange by eddy covariance |
title_full |
Ship-based measurement of air-sea CO2exchange by eddy covariance |
title_fullStr |
Ship-based measurement of air-sea CO2exchange by eddy covariance |
title_full_unstemmed |
Ship-based measurement of air-sea CO2exchange by eddy covariance |
title_sort |
ship-based measurement of air-sea co2exchange by eddy covariance |
publisher |
AGU (American Geophysical Union) |
publishDate |
2010 |
url |
https://oceanrep.geomar.de/id/eprint/10680/ https://oceanrep.geomar.de/id/eprint/10680/1/2009JD012193.pdf https://doi.org/10.1029/2009JD012193 |
long_lat |
ENVELOPE(146.867,146.867,-67.867,-67.867) |
geographic |
Webb |
geographic_facet |
Webb |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/10680/1/2009JD012193.pdf Miller, S. D., Marandino, C. and Saltzman, E. S. (2010) Ship-based measurement of air-sea CO2exchange by eddy covariance. Open Access Journal of Geophysical Research: Atmospheres, 115 (D2). D02304. DOI 10.1029/2009JD012193 <https://doi.org/10.1029/2009JD012193>. doi:10.1029/2009JD012193 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2009JD012193 |
container_title |
Journal of Geophysical Research |
container_volume |
115 |
container_issue |
D2 |
_version_ |
1766131260175941632 |