极地研究

极地研究 ›› 2012, Vol. 24 ›› Issue (2): 120-128.DOI: 10.3724/SP.J.1084.2012.00120

• 研究论文 • 上一篇    下一篇

夏季西北冰洋表层淡水分布的总碱度示踪研究

高众勇,孙恒,陈立奇,张凡   

  1. 国家海洋局第三海洋研究所，国家海洋局海洋-大气化学与全球变化重点实验室
  • 收稿日期:2011-09-09 修回日期:2011-12-14 出版日期:2012-06-30 发布日期:2012-06-30
  • 通讯作者: 高众勇
  • 基金资助:

    白令海入流水对北冰洋生态系统及碳汇的影响研究;十年间南大洋碳吸收变化及其对全球变化的响应;北极碳汇十年变化及其对北极海冰快速变化的响应;夏季白令海二氧化碳体系关键问题研究;北极海洋生态系统对海冰快速变化响应的评价技术

Summertime fresh water fractions in the surface water of the western arctic ocean evaluated from total alkalinity

Gao Zhongyong，Sun Heng，Chen Liqi，Zhang Fan   

  1. Key Laboratory of Global Change and Marine-Atmospheric Chemistry, Third Institute of Oceanography, State Oceanic Administration
  • Received:2011-09-09 Revised:2011-12-14 Online:2012-06-30 Published:2012-06-30
  • Contact: GAO Zhongyong

PDF (PC)

1542

被引次数

7

摘要： 利用中国第三次北极科学考察在西北冰洋所进行的海水总碱度的测量，通过海水、海冰融化水以及河源淡水三个端元总碱度特征的显著差异计算西北冰洋夏季表层海水中淡水所占的比例。研究表明，西北冰洋海冰融化水所占比例最大区域在加拿大海盆区75°N附近，这是冰缘带位置，往北向高纬度的冰密集中逐渐增加。而河源淡水的组份则与北冰洋的环流密切相关，并且在西北冰洋水体中逐渐累积。

关键词: 西北冰洋, 总碱度, 淡水分布, 海冰融化水, 河水

Abstract: As a quasi-conservative tracer, total alkalinity (TA) could trace freshwater and seawater. In this study, fractions of sea ice meltwater, river runoff, and seawater in the surface water of western Arctic Ocean are determined from salinity and total alkalinity relationships based on the Third Chinese Arctic Research Expedition during the summer of 2008. The largest fraction of sea ice meltwater was found around 75°N in the Canada Basin, the ice edge zone during survey, where ice concentrations increased northward gradually. The presence of river runoff was associated with the circulation, accumulated in the western Arctic Ocean.

Key words: western Arctic Ocean, total alkalinity, fresh water fractions, sea ice meltwater, river runoff