| Low 210Pb in the upper thermocline in the Canadian Basin: scavenge process over the Chukchi Sea |
| |
| 作者姓名： | HU Wangjiang CHEN Min YANG Weifeng ZHANG Run QIU Yusheng ZHENG Minfang |
| |
| 作者单位： | College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China;College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China;State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China;College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China;State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China;College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China;College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China;State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China;College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China |
| |
| 基金项目： | The Chinese Polar Environment Comprehensive Investigation and Assessment Programs under contract No. CHINARE2014-03-04-03; the National Natural Science Foundation of China under contract No. 41125020; the 4th Chinese Arctic Research Program; the Polar Science Strategic Research Foundation of China under contract No. 20120307. |
| |
| 摘 要： | 210Pb was measured during the 3rd Chinese National Arctic Research Expedition cruise to investigate its spatial pattern in the western Arctic Ocean, as well as its relation with the thermocline in the Canadian Basin. The specific activities varied from 0.04 to 2.72, 0.013 to 4.37, and 0.1 to 4.85 Bq/m3 for dissolved, particulate, and bulk 210Pb, respectively, corresponding to respective averages of 0.65, 0.43, and 1.08 Bq/m3. In the Canadian Basin, the minimum 210Pb activities occurred in the thermocline, which was characterized by low temperature of-1.52°C and salinity of 33.1. Combining the spatial distribution of 210Pb and hydrographical characteristics in the western Arctic Ocean, this scenario was ascribed to the effective scavenging of 210Pb when the Pacific water flowed across the Chukchi Shelf. Quantitatively, this interpretation was supported by both the shorter residence times and higher scavenging efficiencies(SE) of dissolved 210Pb over the Chukchi Shelf. The highest SE values were observed in the Herald Shoal and bottom waters over the slope.
|
| 关 键 词： | 铅-210 加拿大海盆 温跃层 楚科奇海 清理 北极科学考察 水文特性 清除效率 |
| 收稿时间： | 2013/1/25 0:00:00 |
| 修稿时间： | 2013/4/13 0:00:00 |
Low 210Pb in the upper thermocline in the Canadian Basin: scavenge process over the Chukchi Sea |
| |
| HU Wangjiang,CHEN Min,YANG Weifeng,ZHANG Run,QIU Yusheng,ZHENG Minfang.Low 210Pb in the upper thermocline in the Canadian Basin: scavenge process over the Chukchi Sea[J].Acta Oceanologica Sinica,2014,33(6):28-39. |
| |
| Authors: | HU Wangjiang CHEN Min YANG Weifeng ZHANG Run QIU Yusheng and ZHENG Minfang |
| |
| Institution: | 1.College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China2.College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China;State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China |
| |
| Abstract: | 210Pb was measured during the 3rd Chinese National Arctic Research Expedition cruise to investigate its spatial pattern in the western Arctic Ocean, as well as its relation with the thermocline in the Canadian Basin. The specific activities varied from 0.04 to 2.72, <0.013 to 4.37, and 0.1 to 4.85 Bq/m3 for dissolved, particulate, and bulk 210Pb, respectively, corresponding to respective averages of 0.65, 0.43, and 1.08 Bq/m3. In the Canadian Basin, the minimum 210Pb activities occurred in the thermocline, which was characterized by low temperature of-1.52℃ and salinity of 33.1. Combining the spatial distribution of 210Pb and hydrographical characteristics in the western Arctic Ocean, this scenario was ascribed to the effective scavenging of 210Pb when the Pacific water flowed across the Chukchi Shelf. Quantitatively, this interpretation was supported by both the shorter residence times and higher scavenging efficiencies (SE) of dissolved 210Pb over the Chukchi Shelf. The highest SE values were observed in the Herald Shoal and bottom waters over the slope. |
| |
| Keywords: | 210Pb halocline Canadian Basin Chukchi Sea |
| 本文献已被 CNKI 维普 SpringerLink 等数据库收录！ |
| 点击此处可从《海洋学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《海洋学报(英文版)》下载免费的PDF全文 |
|
