1980 年代中期南极环极洋流区域混合层深度趋势变化的诱因是什么？

IF 1.4 3区地球科学 Q3 OCEANOGRAPHY

Acta Oceanologica Sinica Pub Date : 2024-04-12 DOI:10.1007/s13131-023-2268-5

Shan Liu, Jingzhi Su, Huijun Wang, Cuijuan Sui

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引用次数: 0

摘要

1960-2021年期间，南极环极洋流（ACC）区域的年平均值和冬季混合层深度（MLD）出现了明显的趋势性变化。变浅趋势在 20 世纪 80 年代中期停止，随后是一个趋势较弱的时期。两个时期的 MLD 深化趋势差异主要分布在德雷克海峡西部地区、维多利亚陆地和威尔克斯陆地以北地区以及南印度洋板块的中部地区。两个时期之间，由于 ACC 流轴的经向移动而新形成的洋流切变，是导致分布在德雷克海峡西部地区和南印度洋中部地区的 MLD 趋势变化的主要驱动力。维多利亚陆地和威尔克斯陆地以北地区的咸化趋势可能是该地区混合过程加强的原因。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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What induced the trend shift of mixed-layer depths in the Antarctic Circumpolar Current region in the mid-1980s?

An obvious trend shift in the annual mean and winter mixed layer depth (MLD) in the Antarctic Circumpolar Current (ACC) region was detected during the 1960–2021 period. Shallowing trends stopped in mid-1980s, followed by a period of weak trends. The MLD deepening trend difference between the two periods were mainly distributed in the western areas in the Drake Passage, the areas north to Victoria Land and Wilkes Land, and the central parts of the South Indian sector. The newly formed ocean current shear due to the meridional shift of the ACC flow axis between the two periods is the dominant driver for the MLD trends shift distributed in the western areas in the Drake Passage and the central parts of the South Indian sector. The saltier trends in the regions north to Victoria Land and Wilkes Land could be responsible for the strengthening mixing processes in this region.

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来源期刊

Acta Oceanologica Sinica 地学-海洋学

CiteScore

2.50

自引率

7.10%

发文量

3884

审稿时长

9 months

期刊介绍： Founded in 1982, Acta Oceanologica Sinica is the official bi-monthly journal of the Chinese Society of Oceanography. It seeks to provide a forum for research papers in the field of oceanography from all over the world. In working to advance scholarly communication it has made the fast publication of high-quality research papers within this field its primary goal. The journal encourages submissions from all branches of oceanography, including marine physics, marine chemistry, marine geology, marine biology, marine hydrology, marine meteorology, ocean engineering, marine remote sensing and marine environment sciences. It publishes original research papers, review articles as well as research notes covering the whole spectrum of oceanography. Special issues emanating from related conferences and meetings are also considered. All papers are subject to peer review and are published online at SpringerLink.