大气科学2013，Vol.37Issue(2)：395-410,16.DOI:10.3878/j.issn.1006-9895.2012.12306
海洋环流对全球增暖趋势的调制:基于FGOALS-s2的数值模拟研究
The Modulation of Ocean Circulation to the Global Warming Trend:Numerical Simulation by FGOALS-s2
摘要
Abstract
Along with the long-term global warming trend since the industrial revolution, observations of global averaged surface air temperature have also shown a decadal variability. Superimposing the climate variations with two time scales above can result in reduced or no warming in some decades such as 1999-2008 and increased warming in other decades such as 1980-1998. The main goal of this study was to explore the reasons that may cause the warming hiatus or accelerated warming periods by using a coupled global climate model (GCM) FGOALS-s2, developed at the State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics (LAP), Beijing, China. The model reproduces not only the long-term warming trend, but also significant decadal variability. The global mean energy budget analysis indicates that the decadal variability of the global mean surface temperature is independent of the net top-of-atmosphere (TO A) radiation flux, implying that it may be associated with the re-distribution of heat in the climate system. Using composite analysis and regression analysis, the decadal characteristics of the global surface temperature and sea surface temperature (SST) were very similar in most regions: during the hiatus period, the SST decreased, and more heat flux penetrated into the subsurface or deep ocean; during the acceleration period, more heat was trapped in the upper ocean and the SST increased. Furthermore, on a decadal timescale, the climate variability of the Subtropical-Tropical meridional Cells (STC) played a crucial role in modulating the SST and the subsurface temperature in the Pacific Ocean. Remote responses of the anomaly wind stress and the net surface heat flux to the SST anomalies in the tropical Pacific can induce the decadal changes of sea temperature in the Indian Ocean and the Atlantic Ocean. In the processes associated with decadal variability, ocean circulations also play important roles, e.g., the Indonesian Throughflow (ITF) has a great impact on the changes of the subsurface sea temperature in the South Indian Ocean at decadal time scales, and the deep-ocean temperature in the Atlantic can be directly affected by the Atlantic Meridional Overturning Current (AMOC).关键词
气候系统模式/全球增暖/年代际变化/副热带—热带经圈环流(STC)/印度尼西亚贯穿流(ITF)/大西洋经圈翻转流函数(AMOC)Key words
Climate system model/ Global warming/ Decadal variability/ Subtropical-Tropical Cell (STC)/ Indonesian Throughflow (ITF)/ Atlantic Meridional Overturning Circulation (AMOC)分类
天文与地球科学引用本文复制引用
俞永强,宋毅..海洋环流对全球增暖趋势的调制:基于FGOALS-s2的数值模拟研究[J].大气科学,2013,37(2):395-410,16.基金项目
国家重点基础研究计划项目2010CB950502,中国科学院战略性先导科技专项XDA05110302,公益行业(气象)科技专项GYHY200906020,国家高科技发展计划(863计划)项目2010AA012304,国家自然科学基金项目40975065 （气象）
