极地研究2017，Vol.29Issue(3)：378-389,12.DOI:10.13679/j.jdyj.2017.3.378
南极普里兹湾海域夏季表层水与绕极深层水年际变化
THE INTER-ANNUAL VARIATION OF SUMMER SURFACE WATER AND CIRCUMPOLAR DEEP WATER IN PRYDZ BAY, ANTARCTIC
摘要
Abstract
Based on the hydrographic data obtained from four CHINARE (Chinese National Antarctic Research Expedition) cruises (27th, 28th, 29th, 31st) in Prydz Bay, we analyze the distribution of water masses, the inter-annual variation of SSW (summer surface water) and the formation mechanisms, and the inter-annual variation of the upwelling CDW (circumpolar deep water). It is found that SSW has wide ranges of tem-perature and salinity, especially duringthe cruises of 27th and 29thand higher temperature up to 1.22℃in the 27th cruise. Due to less sea ice cover, the area of the SSW during the 29th cruise was much larger. While the thickness of the SSW was 50 meters (in the sections of 73°E, 75.5°E and 67.25°S) during the 29th cruise, the depth of the SSW during the 31st cruise was 100 meters. The upwelling of CDW is clearly depicted es-pecially in the section of 73°E in the cruises of 28th and 29th. It is observed that the CDW upwells to 90 m in the cruise of 28th and extends southward to 67.67°S in the 29th cruise. Cyclonic circulation has great ef-fect on the transportation of the upwelling of CDW in the bay.关键词
普里兹湾/夏季表层水/绕极深层水涌升/动力高度/海冰密集度Key words
Prydz Bay/summer surface water/circumpolar deep water upwelling/dynamic height/sea ice concentration引用本文复制引用
吴成祥,李丙瑞,左菲,Jia Wang,李院生..南极普里兹湾海域夏季表层水与绕极深层水年际变化[J].极地研究,2017,29(3):378-389,12.基金项目
国家自然科学基金(41376190)、南北极环境综合考察与评估专项(CHINARE2016-01-01)、工信部联装([2013]412)项目海洋公益性行业科研专项(201405031)资助 （41376190）
