李心月,陈显尧

• 1:中国海洋大学物理海洋教育部重点实验室

摘要(Abstract)：

有卫星高度计观测的近三十年来，观测数据显示，北大西洋经向翻转环流(Atlantic Meridonal Overturing Circulation, AMOC)增强时全球变暖减缓，而AMOC减弱时变暖加速，与以往利用数值模式给出的AMOC与全球气候变化同位相的认识不同。本文利用海洋再分析数据中的温度、盐度和海流场，分析了AMOC通过调节海洋热量分配进而影响全球气候变化的特征。结果显示，在二十世纪初期，AMOC与全球平均海表面温度(Sea Searface Temperture, SST)变化同位相，而随着温室气体辐射强迫逐渐增强，两者的关系发生了变化：AMOC增强导致北大西洋副极地中深层热输送增强，缓解了表面辐射强迫引起的全球SST升温，全球变暖减缓；AMOC减弱时，向中深层的热输送减少，表层辐射强迫几乎全部用来加热表层海洋，全球加速变暖。再分析数据证实过去和现代气候中AMOC对全球SST的影响存在差异。

关键词(KeyWords)： 北大西洋经向翻转环流(AMOC);辐射强迫;中深层海洋热输送;再分析数据

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(4182500207,417760032)资助~~

作者(Author): 李心月,陈显尧

DOI: 10.16441/j.cnki.hdxb.20210095

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