Biological productivity and carbon cycling in the Arctic Ocean
Primary production, bacterial production, particulate organic carbon fluxes and organic carbon burial rates were quantified during the summer period of 1999 in the Arctic Ocean via C-14 uptake, H-3 uptake, Th-234/U-238 disequilibrium and Pb-210(ex), dating, respectively. The integrated primary produ...
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ftxiamenuniv:oai:dspace.xmu.edu.cn:2288/60957 2023-05-15T14:41:27+02:00 Biological productivity and carbon cycling in the Arctic Ocean Chen, M. Huang, Y. P. 黄奕普 Guo, L. D. Cai, P. H. Yang, W. F. Liu, G. S. 刘广山 Qiu, Y. S. 2002-06 http://dspace.xmu.edu.cn/handle/2288/60957 en_US eng Chinese Science Bulletin, 2002,47(12):1037-1040 1001-6538 ISI:000175994600017 http://dspace.xmu.edu.cn/handle/2288/60957 http://dx.doi.org/10.1360/02tb9233 CHUKCHI-SEA ORGANIC-CARBON EXPORT SUMMER Article 2002 ftxiamenuniv 2020-07-21T11:32:28Z Primary production, bacterial production, particulate organic carbon fluxes and organic carbon burial rates were quantified during the summer period of 1999 in the Arctic Ocean via C-14 uptake, H-3 uptake, Th-234/U-238 disequilibrium and Pb-210(ex), dating, respectively. The integrated primary production in the water column was as high as 197 mmolC/(m(2) . d) in the Chukchi shelf and was 3.8 mmolC/(m(2) . d) in the Canada Basin. These rates are higher than those reported previously. The ratios of bacterial production to primary production In the study region were higher than 0.5, indicating that microbial activity is not depressed but important in cold Arctic waters. Th-234/U-238 disequilibria were evident at the station in the Canada Basin. The presence of significant Th-234 deficiency suggested that scavenging and removal processes are also important to biogeochemical cycles of trace elements in the Arctic Ocean. Particulate organic carbon export flux was estimated to be 1.0 mmolC/(m(2) . d). Measurements of sediment excess Pb-210 profile in the Chukchi shelf allowed us to estimate the amount of organic carbon buried in the bottom sediment, which ranged from 25 to 35 mmolC/(m(2) . d) and represented about 59%-82% of the mean primary production in the euphotic zone. Overall, our results indicated that the Arctic Ocean has active carbon cycling and is not a biological desert as previously believed. Therefore, the Arctic Ocean may play an important role in the global carbon cycle and climate change. Article in Journal/Newspaper Arctic Arctic Ocean canada basin Chukchi Chukchi Sea Climate change Xiamen University Institutional Repository Arctic Arctic Ocean Canada Chukchi Sea Chukchi Shelf ENVELOPE(-169.167,-169.167,70.550,70.550) |
institution |
Open Polar |
collection |
Xiamen University Institutional Repository |
op_collection_id |
ftxiamenuniv |
language |
English |
topic |
CHUKCHI-SEA ORGANIC-CARBON EXPORT SUMMER |
spellingShingle |
CHUKCHI-SEA ORGANIC-CARBON EXPORT SUMMER Chen, M. Huang, Y. P. 黄奕普 Guo, L. D. Cai, P. H. Yang, W. F. Liu, G. S. 刘广山 Qiu, Y. S. Biological productivity and carbon cycling in the Arctic Ocean |
topic_facet |
CHUKCHI-SEA ORGANIC-CARBON EXPORT SUMMER |
description |
Primary production, bacterial production, particulate organic carbon fluxes and organic carbon burial rates were quantified during the summer period of 1999 in the Arctic Ocean via C-14 uptake, H-3 uptake, Th-234/U-238 disequilibrium and Pb-210(ex), dating, respectively. The integrated primary production in the water column was as high as 197 mmolC/(m(2) . d) in the Chukchi shelf and was 3.8 mmolC/(m(2) . d) in the Canada Basin. These rates are higher than those reported previously. The ratios of bacterial production to primary production In the study region were higher than 0.5, indicating that microbial activity is not depressed but important in cold Arctic waters. Th-234/U-238 disequilibria were evident at the station in the Canada Basin. The presence of significant Th-234 deficiency suggested that scavenging and removal processes are also important to biogeochemical cycles of trace elements in the Arctic Ocean. Particulate organic carbon export flux was estimated to be 1.0 mmolC/(m(2) . d). Measurements of sediment excess Pb-210 profile in the Chukchi shelf allowed us to estimate the amount of organic carbon buried in the bottom sediment, which ranged from 25 to 35 mmolC/(m(2) . d) and represented about 59%-82% of the mean primary production in the euphotic zone. Overall, our results indicated that the Arctic Ocean has active carbon cycling and is not a biological desert as previously believed. Therefore, the Arctic Ocean may play an important role in the global carbon cycle and climate change. |
format |
Article in Journal/Newspaper |
author |
Chen, M. Huang, Y. P. 黄奕普 Guo, L. D. Cai, P. H. Yang, W. F. Liu, G. S. 刘广山 Qiu, Y. S. |
author_facet |
Chen, M. Huang, Y. P. 黄奕普 Guo, L. D. Cai, P. H. Yang, W. F. Liu, G. S. 刘广山 Qiu, Y. S. |
author_sort |
Chen, M. |
title |
Biological productivity and carbon cycling in the Arctic Ocean |
title_short |
Biological productivity and carbon cycling in the Arctic Ocean |
title_full |
Biological productivity and carbon cycling in the Arctic Ocean |
title_fullStr |
Biological productivity and carbon cycling in the Arctic Ocean |
title_full_unstemmed |
Biological productivity and carbon cycling in the Arctic Ocean |
title_sort |
biological productivity and carbon cycling in the arctic ocean |
publishDate |
2002 |
url |
http://dspace.xmu.edu.cn/handle/2288/60957 |
long_lat |
ENVELOPE(-169.167,-169.167,70.550,70.550) |
geographic |
Arctic Arctic Ocean Canada Chukchi Sea Chukchi Shelf |
geographic_facet |
Arctic Arctic Ocean Canada Chukchi Sea Chukchi Shelf |
genre |
Arctic Arctic Ocean canada basin Chukchi Chukchi Sea Climate change |
genre_facet |
Arctic Arctic Ocean canada basin Chukchi Chukchi Sea Climate change |
op_source |
http://dx.doi.org/10.1360/02tb9233 |
op_relation |
Chinese Science Bulletin, 2002,47(12):1037-1040 1001-6538 ISI:000175994600017 http://dspace.xmu.edu.cn/handle/2288/60957 |
_version_ |
1766313213634281472 |