Importance of lateral transport processes to Pb-210 budget in the eastern Chukchi Sea during summer 2003
Chinese IPY Research Program; National Natural Science Foundation of China [41125020]; Fujian Natural Science Foundation [2009J06026]; State Oceanic Administration of China [201105022-4]; Ministry of Education of China Activity concentrations of dissolved and particulate Pb-210 and Ra-226 in the wat...
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ftxiamenuniv:oai:dspace.xmu.edu.cn:2288/87847 2023-05-15T15:02:05+02:00 Importance of lateral transport processes to Pb-210 budget in the eastern Chukchi Sea during summer 2003 Chen, Min Ma, Qiang Guo, Laodong Qiu, Yusheng Li, Yanping Yang, Weifeng 陈敏 杨伟锋 2012-12-15 http://dspace.xmu.edu.cn/handle/2288/87847 en_US eng DEEP-SEA RES PT II DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 2012,81-84:53-62 WOS:000311654500007 http://dspace.xmu.edu.cn/handle/2288/87847 http://dx.doi.org/10.1016/j.dsr2.2012.03.011 PARTICULATE ORGANIC-CARBON WESTERN ARCTIC-OCEAN MIDDLE ATLANTIC BIGHT CONTINENTAL-MARGIN CANADA BASIN BERING-SEA BIOLOGICAL PRODUCTIVITY SURFACE WATERS EXPORT FLUXES POC EXPORT Article 2012 ftxiamenuniv 2020-07-21T11:42:26Z Chinese IPY Research Program; National Natural Science Foundation of China [41125020]; Fujian Natural Science Foundation [2009J06026]; State Oceanic Administration of China [201105022-4]; Ministry of Education of China Activity concentrations of dissolved and particulate Pb-210 and Ra-226 in the water column were measured in the eastern Chukchi Sea during summer 2003. Th-234/U-238 disequilibria were used to estimate the scavenging fluxes of Pb-210 from the water column to the underlying sediments. Our results showed that concentrations of Pb-210 and its distributions were mainly influenced by mixing processes of water masses and sediment resuspension. The residence times of Pb-210 in the eastern Chukchi Sea ranged from 5 to 103 d. Short residence times were mostly observed at the shelf stations, indicating a more effective particle scavenging in the shelf region. A mass balance model was constructed to evaluate the contribution of lateral transport to Pb-210 budget in the water column. The lateral transport fluxes of Pb-210 ranged from 17 to 177 Bq/m(2)/a, comprising up to 63-94% of the total supply of Pb-210 in the eastern Chukchi Sea. We hypothesize that the accumulative removal of Pb-210 in the Pacific inflow waters during their transport across the Chukchi Sea and the import of Pb-210 from sea ice rafted sediments are the two major lateral transport pathways for the import of Pb-210 to the eastern Chukchi Sea. Our results highlight the importance of lateral transport processes to the geographical distribution of particle-reactive elements and their biogeochemical cycles in the Arctic Ocean. (C) 2012 Elsevier Ltd. All rights reserved. Article in Journal/Newspaper Arctic Arctic Ocean Bering Sea canada basin Chukchi Chukchi Sea IPY Sea ice Xiamen University Institutional Repository Arctic Arctic Ocean Bering Sea Chukchi Sea Canada Pacific |
institution |
Open Polar |
collection |
Xiamen University Institutional Repository |
op_collection_id |
ftxiamenuniv |
language |
English |
topic |
PARTICULATE ORGANIC-CARBON WESTERN ARCTIC-OCEAN MIDDLE ATLANTIC BIGHT CONTINENTAL-MARGIN CANADA BASIN BERING-SEA BIOLOGICAL PRODUCTIVITY SURFACE WATERS EXPORT FLUXES POC EXPORT |
spellingShingle |
PARTICULATE ORGANIC-CARBON WESTERN ARCTIC-OCEAN MIDDLE ATLANTIC BIGHT CONTINENTAL-MARGIN CANADA BASIN BERING-SEA BIOLOGICAL PRODUCTIVITY SURFACE WATERS EXPORT FLUXES POC EXPORT Chen, Min Ma, Qiang Guo, Laodong Qiu, Yusheng Li, Yanping Yang, Weifeng 陈敏 杨伟锋 Importance of lateral transport processes to Pb-210 budget in the eastern Chukchi Sea during summer 2003 |
topic_facet |
PARTICULATE ORGANIC-CARBON WESTERN ARCTIC-OCEAN MIDDLE ATLANTIC BIGHT CONTINENTAL-MARGIN CANADA BASIN BERING-SEA BIOLOGICAL PRODUCTIVITY SURFACE WATERS EXPORT FLUXES POC EXPORT |
description |
Chinese IPY Research Program; National Natural Science Foundation of China [41125020]; Fujian Natural Science Foundation [2009J06026]; State Oceanic Administration of China [201105022-4]; Ministry of Education of China Activity concentrations of dissolved and particulate Pb-210 and Ra-226 in the water column were measured in the eastern Chukchi Sea during summer 2003. Th-234/U-238 disequilibria were used to estimate the scavenging fluxes of Pb-210 from the water column to the underlying sediments. Our results showed that concentrations of Pb-210 and its distributions were mainly influenced by mixing processes of water masses and sediment resuspension. The residence times of Pb-210 in the eastern Chukchi Sea ranged from 5 to 103 d. Short residence times were mostly observed at the shelf stations, indicating a more effective particle scavenging in the shelf region. A mass balance model was constructed to evaluate the contribution of lateral transport to Pb-210 budget in the water column. The lateral transport fluxes of Pb-210 ranged from 17 to 177 Bq/m(2)/a, comprising up to 63-94% of the total supply of Pb-210 in the eastern Chukchi Sea. We hypothesize that the accumulative removal of Pb-210 in the Pacific inflow waters during their transport across the Chukchi Sea and the import of Pb-210 from sea ice rafted sediments are the two major lateral transport pathways for the import of Pb-210 to the eastern Chukchi Sea. Our results highlight the importance of lateral transport processes to the geographical distribution of particle-reactive elements and their biogeochemical cycles in the Arctic Ocean. (C) 2012 Elsevier Ltd. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Chen, Min Ma, Qiang Guo, Laodong Qiu, Yusheng Li, Yanping Yang, Weifeng 陈敏 杨伟锋 |
author_facet |
Chen, Min Ma, Qiang Guo, Laodong Qiu, Yusheng Li, Yanping Yang, Weifeng 陈敏 杨伟锋 |
author_sort |
Chen, Min |
title |
Importance of lateral transport processes to Pb-210 budget in the eastern Chukchi Sea during summer 2003 |
title_short |
Importance of lateral transport processes to Pb-210 budget in the eastern Chukchi Sea during summer 2003 |
title_full |
Importance of lateral transport processes to Pb-210 budget in the eastern Chukchi Sea during summer 2003 |
title_fullStr |
Importance of lateral transport processes to Pb-210 budget in the eastern Chukchi Sea during summer 2003 |
title_full_unstemmed |
Importance of lateral transport processes to Pb-210 budget in the eastern Chukchi Sea during summer 2003 |
title_sort |
importance of lateral transport processes to pb-210 budget in the eastern chukchi sea during summer 2003 |
publisher |
DEEP-SEA RES PT II |
publishDate |
2012 |
url |
http://dspace.xmu.edu.cn/handle/2288/87847 |
geographic |
Arctic Arctic Ocean Bering Sea Chukchi Sea Canada Pacific |
geographic_facet |
Arctic Arctic Ocean Bering Sea Chukchi Sea Canada Pacific |
genre |
Arctic Arctic Ocean Bering Sea canada basin Chukchi Chukchi Sea IPY Sea ice |
genre_facet |
Arctic Arctic Ocean Bering Sea canada basin Chukchi Chukchi Sea IPY Sea ice |
op_source |
http://dx.doi.org/10.1016/j.dsr2.2012.03.011 |
op_relation |
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 2012,81-84:53-62 WOS:000311654500007 http://dspace.xmu.edu.cn/handle/2288/87847 |
_version_ |
1766334073566920704 |