Seasonal changes in POC export flux in the Chukchi Sea and implications for water column-benthic coupling in Arctic shelves
As part of the 2002 Shelf-Basin Interactions (SBI) process study, measurements of the seasonal variation in the export flux of particulate organic carbon (POC) are reported for the upper waters of the Chukchi Sea. POC fluxes were quantified by determination of 234Th/238U disequilibrium and POC/234Th...
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ftsouthampton:oai:eprints.soton.ac.uk:358276 2023-07-30T04:00:00+02:00 Seasonal changes in POC export flux in the Chukchi Sea and implications for water column-benthic coupling in Arctic shelves Moran, S.B. Kelly, R.P. Hagstrom, K. Smith, J.N. Grebmeier, J.M. Cooper, L.W. Cota, G.F. Walsh, J.J. Bates, N.R. Hansell, D.A. Maslowski, W. Nelson, R.P. Mulsow, S. 2005-12 https://eprints.soton.ac.uk/358276/ English eng Moran, S.B., Kelly, R.P., Hagstrom, K., Smith, J.N., Grebmeier, J.M., Cooper, L.W., Cota, G.F., Walsh, J.J., Bates, N.R., Hansell, D.A., Maslowski, W., Nelson, R.P. and Mulsow, S. (2005) Seasonal changes in POC export flux in the Chukchi Sea and implications for water column-benthic coupling in Arctic shelves. Deep Sea Research Part II: Topical Studies in Oceanography, 52 (24-26), 3427-3451. (doi:10.1016/j.dsr2.2005.09.011 <http://dx.doi.org/10.1016/j.dsr2.2005.09.011>). Article PeerReviewed 2005 ftsouthampton https://doi.org/10.1016/j.dsr2.2005.09.011 2023-07-09T21:49:26Z As part of the 2002 Shelf-Basin Interactions (SBI) process study, measurements of the seasonal variation in the export flux of particulate organic carbon (POC) are reported for the upper waters of the Chukchi Sea. POC fluxes were quantified by determination of 234Th/238U disequilibrium and POC/234Th ratios in large View the MathML source aggregates collected using in situ pumps. Samples were collected at 35 stations on two cruises, one in predominantly ice-coved conditions during the spring (May 6–June 15) and the other in predominantly open water during the summer (July 17–August 26). Enhanced particle export was observed in the shelf and slope waters, particularly within Barrow Canyon, and there was a marked increase in particle export at all stations during the summer (July–August) relative to the spring (May–June). 234Th-derived POC fluxes exhibit significant seasonal and spatial variability, averaging View the MathML sourceView the MathML source in the spring and increasing ?4-fold in the summer to an average value of View the MathML sourceView the MathML source. The fraction of primary production exported from the upper waters increases from ?15% in the spring to ?32% in the summer. By comparison, DOC accumulation associated with net community production represented ?6% of primary production View the MathML source. The majority of shelf and slope stations indicate a close agreement between POC export and benthic C respiration in the spring, whereas there is an imbalance between POC export and benthic respiration in the summer. The implication is that up to ?20% of summer production View the MathML source may be seasonally exported off-shelf in this productive shelf/slope region of the Arctic Ocean. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Chukchi Chukchi Sea University of Southampton: e-Prints Soton Arctic Arctic Ocean Barrow Canyon ENVELOPE(-154.000,-154.000,72.500,72.500) Chukchi Sea Deep Sea Research Part II: Topical Studies in Oceanography 52 24-26 3427 3451 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
As part of the 2002 Shelf-Basin Interactions (SBI) process study, measurements of the seasonal variation in the export flux of particulate organic carbon (POC) are reported for the upper waters of the Chukchi Sea. POC fluxes were quantified by determination of 234Th/238U disequilibrium and POC/234Th ratios in large View the MathML source aggregates collected using in situ pumps. Samples were collected at 35 stations on two cruises, one in predominantly ice-coved conditions during the spring (May 6–June 15) and the other in predominantly open water during the summer (July 17–August 26). Enhanced particle export was observed in the shelf and slope waters, particularly within Barrow Canyon, and there was a marked increase in particle export at all stations during the summer (July–August) relative to the spring (May–June). 234Th-derived POC fluxes exhibit significant seasonal and spatial variability, averaging View the MathML sourceView the MathML source in the spring and increasing ?4-fold in the summer to an average value of View the MathML sourceView the MathML source. The fraction of primary production exported from the upper waters increases from ?15% in the spring to ?32% in the summer. By comparison, DOC accumulation associated with net community production represented ?6% of primary production View the MathML source. The majority of shelf and slope stations indicate a close agreement between POC export and benthic C respiration in the spring, whereas there is an imbalance between POC export and benthic respiration in the summer. The implication is that up to ?20% of summer production View the MathML source may be seasonally exported off-shelf in this productive shelf/slope region of the Arctic Ocean. |
format |
Article in Journal/Newspaper |
author |
Moran, S.B. Kelly, R.P. Hagstrom, K. Smith, J.N. Grebmeier, J.M. Cooper, L.W. Cota, G.F. Walsh, J.J. Bates, N.R. Hansell, D.A. Maslowski, W. Nelson, R.P. Mulsow, S. |
spellingShingle |
Moran, S.B. Kelly, R.P. Hagstrom, K. Smith, J.N. Grebmeier, J.M. Cooper, L.W. Cota, G.F. Walsh, J.J. Bates, N.R. Hansell, D.A. Maslowski, W. Nelson, R.P. Mulsow, S. Seasonal changes in POC export flux in the Chukchi Sea and implications for water column-benthic coupling in Arctic shelves |
author_facet |
Moran, S.B. Kelly, R.P. Hagstrom, K. Smith, J.N. Grebmeier, J.M. Cooper, L.W. Cota, G.F. Walsh, J.J. Bates, N.R. Hansell, D.A. Maslowski, W. Nelson, R.P. Mulsow, S. |
author_sort |
Moran, S.B. |
title |
Seasonal changes in POC export flux in the Chukchi Sea and implications for water column-benthic coupling in Arctic shelves |
title_short |
Seasonal changes in POC export flux in the Chukchi Sea and implications for water column-benthic coupling in Arctic shelves |
title_full |
Seasonal changes in POC export flux in the Chukchi Sea and implications for water column-benthic coupling in Arctic shelves |
title_fullStr |
Seasonal changes in POC export flux in the Chukchi Sea and implications for water column-benthic coupling in Arctic shelves |
title_full_unstemmed |
Seasonal changes in POC export flux in the Chukchi Sea and implications for water column-benthic coupling in Arctic shelves |
title_sort |
seasonal changes in poc export flux in the chukchi sea and implications for water column-benthic coupling in arctic shelves |
publishDate |
2005 |
url |
https://eprints.soton.ac.uk/358276/ |
long_lat |
ENVELOPE(-154.000,-154.000,72.500,72.500) |
geographic |
Arctic Arctic Ocean Barrow Canyon Chukchi Sea |
geographic_facet |
Arctic Arctic Ocean Barrow Canyon Chukchi Sea |
genre |
Arctic Arctic Arctic Ocean Chukchi Chukchi Sea |
genre_facet |
Arctic Arctic Arctic Ocean Chukchi Chukchi Sea |
op_relation |
Moran, S.B., Kelly, R.P., Hagstrom, K., Smith, J.N., Grebmeier, J.M., Cooper, L.W., Cota, G.F., Walsh, J.J., Bates, N.R., Hansell, D.A., Maslowski, W., Nelson, R.P. and Mulsow, S. (2005) Seasonal changes in POC export flux in the Chukchi Sea and implications for water column-benthic coupling in Arctic shelves. Deep Sea Research Part II: Topical Studies in Oceanography, 52 (24-26), 3427-3451. (doi:10.1016/j.dsr2.2005.09.011 <http://dx.doi.org/10.1016/j.dsr2.2005.09.011>). |
op_doi |
https://doi.org/10.1016/j.dsr2.2005.09.011 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
52 |
container_issue |
24-26 |
container_start_page |
3427 |
op_container_end_page |
3451 |
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1772810658555887616 |