Importance of lateral transport processes to 210Pb budget in the eastern Chukchi Sea during summer 2003
Activity concentrations of dissolved and particulate 210Pb and 226Ra in the water column were measured in the eastern Chukchi Sea during summer 2003. 234Th/238U disequilibria were used to estimate the scavenging fluxes of 210Pb from the water column to the underlying sediments. Our results showed th...
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ftxiamenuniv:oai:dspace.xmu.edu.cn:2288/88227 2023-05-15T15:08:36+02:00 Importance of lateral transport processes to 210Pb budget in the eastern Chukchi Sea during summer 2003 Chen, Mi Ma, Qiang Guo, Laodong Qiu, Yusheng Li, Yanping Yang, Weifen 陈敏 郭劳动 邱雨生 杨伟锋 2012 December 15 http://dspace.xmu.edu.cn/handle/2288/88227 en_US eng Elsevier Ltd Deep-Sea Research Part II: Topical Studies in Oceanography, 2012:53-62 20124715687332 http://dspace.xmu.edu.cn/handle/2288/88227 http://dx.doi.org/10.1016/j.dsr2.2012.03.011 Budget control Sea ice Sedimentology Sediments Article 2012 ftxiamenuniv 2020-07-21T11:42:44Z Activity concentrations of dissolved and particulate 210Pb and 226Ra in the water column were measured in the eastern Chukchi Sea during summer 2003. 234Th/238U disequilibria were used to estimate the scavenging fluxes of 210Pb from the water column to the underlying sediments. Our results showed that concentrations of 210Pb and its distributions were mainly influenced by mixing processes of water masses and sediment resuspension. The residence times of 210Pb in the eastern Chukchi Sea ranged from 5 to 103d. 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 210Pb budget in the water column. The lateral transport fluxes of 210Pb ranged from 17 to 177Bq/m2/a, comprising up to 63-94% of the total supply of 210Pb in the eastern Chukchi Sea. We hypothesize that the accumulative removal of 210Pb in the Pacific inflow waters during their transport across the Chukchi Sea and the import of 210Pb from sea ice rafted sediments are the two major lateral transport pathways for the import of 210Pb 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. 漏 2012 Elsevier Ltd. Article in Journal/Newspaper Arctic Arctic Ocean Chukchi Chukchi Sea Sea ice Xiamen University Institutional Repository Arctic Arctic Ocean Chukchi Sea Pacific |
institution |
Open Polar |
collection |
Xiamen University Institutional Repository |
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ftxiamenuniv |
language |
English |
topic |
Budget control Sea ice Sedimentology Sediments |
spellingShingle |
Budget control Sea ice Sedimentology Sediments Chen, Mi Ma, Qiang Guo, Laodong Qiu, Yusheng Li, Yanping Yang, Weifen 陈敏 郭劳动 邱雨生 杨伟锋 Importance of lateral transport processes to 210Pb budget in the eastern Chukchi Sea during summer 2003 |
topic_facet |
Budget control Sea ice Sedimentology Sediments |
description |
Activity concentrations of dissolved and particulate 210Pb and 226Ra in the water column were measured in the eastern Chukchi Sea during summer 2003. 234Th/238U disequilibria were used to estimate the scavenging fluxes of 210Pb from the water column to the underlying sediments. Our results showed that concentrations of 210Pb and its distributions were mainly influenced by mixing processes of water masses and sediment resuspension. The residence times of 210Pb in the eastern Chukchi Sea ranged from 5 to 103d. 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 210Pb budget in the water column. The lateral transport fluxes of 210Pb ranged from 17 to 177Bq/m2/a, comprising up to 63-94% of the total supply of 210Pb in the eastern Chukchi Sea. We hypothesize that the accumulative removal of 210Pb in the Pacific inflow waters during their transport across the Chukchi Sea and the import of 210Pb from sea ice rafted sediments are the two major lateral transport pathways for the import of 210Pb 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. 漏 2012 Elsevier Ltd. |
format |
Article in Journal/Newspaper |
author |
Chen, Mi Ma, Qiang Guo, Laodong Qiu, Yusheng Li, Yanping Yang, Weifen 陈敏 郭劳动 邱雨生 杨伟锋 |
author_facet |
Chen, Mi Ma, Qiang Guo, Laodong Qiu, Yusheng Li, Yanping Yang, Weifen 陈敏 郭劳动 邱雨生 杨伟锋 |
author_sort |
Chen, Mi |
title |
Importance of lateral transport processes to 210Pb budget in the eastern Chukchi Sea during summer 2003 |
title_short |
Importance of lateral transport processes to 210Pb budget in the eastern Chukchi Sea during summer 2003 |
title_full |
Importance of lateral transport processes to 210Pb budget in the eastern Chukchi Sea during summer 2003 |
title_fullStr |
Importance of lateral transport processes to 210Pb budget in the eastern Chukchi Sea during summer 2003 |
title_full_unstemmed |
Importance of lateral transport processes to 210Pb budget in the eastern Chukchi Sea during summer 2003 |
title_sort |
importance of lateral transport processes to 210pb budget in the eastern chukchi sea during summer 2003 |
publisher |
Elsevier Ltd |
publishDate |
2012 |
url |
http://dspace.xmu.edu.cn/handle/2288/88227 |
geographic |
Arctic Arctic Ocean Chukchi Sea Pacific |
geographic_facet |
Arctic Arctic Ocean Chukchi Sea Pacific |
genre |
Arctic Arctic Ocean Chukchi Chukchi Sea Sea ice |
genre_facet |
Arctic Arctic Ocean Chukchi Chukchi Sea 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, 2012:53-62 20124715687332 http://dspace.xmu.edu.cn/handle/2288/88227 |
_version_ |
1766339936408043520 |