风场输入到海洋中能量的气候变化特征
投稿时间: 2017-05-20  最后修改时间: 2017-05-26  点此下载全文
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作者单位E-mail
谢泽林 南京信息工程大学 zelin_xie@163.com 
王召民 南京信息工程大学 wzm@nuist.edu.cn 
武扬 南京信息工程大学  
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:本文利用一个耦合海冰的高分辨全球海洋模式研究了风应力输入到海洋中能量的年际变化及其对气候变化的响应情况。结果表明:风应力输入到海洋中的能量对气候变化有显著的响应,如:在北大西洋涛动(NAO)正位相的年份风应力输入到海洋中的能量北移且加强,主要由于暴风路径的北移和天气尺度大气活动的加强而致。同样地,在南半球环状模(SAM)正位相年份输入到南大洋的能量也南移并加强,且输入到南极大陆沿岸流中的能量也有显著的增加。经验正交函数分解(EOF)分析结果表明:NAO主导了风应力输入到北大西洋区域的能量变化。而SAM解释了南大洋区域风应力输入能量的第一模态,第二、三模态解释了受ENSO影响的情况。最近几十年,在南大洋区域,风应力及其输入能量的年代际变化都有所增强,而在北半球的中高纬度区域有所下降。
中文关键词:风场输入到海洋中的能量  MITgcm  NAO  SAM  气候变化
 
Climate Change Characteristics of Wind Power Input to the World Ocean
Abstract:The interannual variability of wind power input (WPI) is investigated by a global eddy-permitting ocean-sea ice model. The response of WPI to the climate change is also analyzed that the WPI to the North Antarctic Ocean is increased and stretched northward caused by the strengthened and northward-shifted Storm Tracks in the positive phase of North Atlantic Oscillation (NAO). The WPI to the Southern Ocean has increased with the increased Westerlies in the recent decades; similarly, the WPI to the Antarctic coastal current is strong. The Empirical Orthogonal Function (EOF) analysis presents that the variability of the WPI to the North Antarctic Ocean is dominated by the NAO. The Southern Annual Mode (SAM) leads to the first EOF mode in the Southern Ocean; the second and third modes are related with the ENSO. The decadal variability of the WPI to the Southern Ocean is increased significantly in recent decades, while it is decreased in the northern middle and high latitudes.
keywords:Wind Power Input  MITgcm  NAO  SAM  Climate Change
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