| Distribution of radium-224 in the western Arctic Ocean |
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| 作者姓名： | QIU Yusheng CHEN Min LI Yanping |
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| 作者单位： | QIU Yusheng1，2，CHEN Min1，2，LI Yanping1 1. Department of Oceanography，Xiamen University，Xiamen 361005，China 2. State Key Laboratory of Marine Environmental Science，Xiamen University，Xiamen 361005，China |
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| 基金项目： | 高校新世纪杰出人才项目，中国北极探险基金 |
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| 摘 要： | 1Introduction ThephysicalcharacteristicsintheArcticOcean includewidecontinentalshelves,accountingfor36% oftheocean’ssurfacearea(MooreandSmith,1986) withseasonalicecover.Theprincipalwatersentering theArcticOceanarefromtheNorthAtlanticviathe FramStraitandtheBarentsSea,andtheNorthPacific viatheBeringStrait.Withinthearcticinterior,thewa- tersjoininthelarge-scalecirculationandaresubse- quentlymodifiedbyprocessesofair/sea/iceinterac- tion,riverinflow,andexchangewithsurrounding shelves.Howeve…
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| 关 键 词： | 224Ra distribution western Arctic Ocean |
| 收稿时间： | 2005/8/27 0:00:00 |
| 修稿时间： | 2005/10/24 0:00:00 |
Distribution of radium-224 in the western Arctic Ocean |
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| QIU Yusheng,CHEN Min,LI Yanping.Distribution of radium-224 in the western Arctic Ocean[J].Acta Oceanologica Sinica,2005,24(6):109-116. |
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| Authors: | QIU Yusheng CHEN Min and LI Yanping |
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| Institution: | 1.Department of Oceanography, Xiamen University, Xiamen 361005, China;State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China2.Department of Oceanography, Xiamen University, Xiamen 361005, China |
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| Abstract: | Radium-224 activities in the western Arctic Ocean were measured via ship-board 220Rn emanation technique during the Second Chinese National Arctic Expedition. The results showed that the 224Ra activities in the study areas ranged from being less than 0.08 to 3.58 Bq/m3, with an average of 0.23 Bq/m3. The low 224Ra concentration in the surface water was attributed to the influence of sea ice melted water. The horizontal distribution of surface 224Ra in the western Arctic Ocean showed a high 224Ra characteristics occurred along the slope around 160°W, providing evidence for the importance of ice-rafted sediments to controlling the distribution of radium isotopes in the Arctic Ocean. Mostly, 224Ra concentrations increased with the depth in the shelf region and reached a maximum at 75 m at the central Canada Basin, which further confirms the importance of the transport of shelf bottom water to maintaining the upper halocline layer in the Canada Basin. |
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| Keywords: | 224Ra distribution western Arctic Ocean |
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