Heat budget analysis in three typical warm periods simulated by FGOALS-s2  

作　　者：LUAN Yi-Hua YU Yong-Qiang ZHENG Wei-Peng 

机构地区：[1]State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics,Institute of Atmospheric Physics,Chinese Academy of Sciences [2]Climate Change Research Center,Chinese Academy of Sciences

出　　处：《Atmospheric and Oceanic Science Letters》2016年第2期83-89,共7页大气和海洋科学快报（英文版）

基　　金：jointly supported by the National Natural Science Foundation of China[grant numbers 41406045 and 41376002];National Basic Research Program of China[grant number 2013CB956204];‘Strategic Priority Research Program on Climate Change:Carbon Budget and Relevant Issues’ of the Chinese Academy of Sciences[grant number XDA05110302]

摘　　要：This study compared basic warming patterns among three typical warm periods — the midHolocene（MH）, Medieval Warm Period（MWP）, and the twentieth century warming（20CW） — and carried out a comprehensive heat budget analysis using four experiments simulated by the Flexible Global Ocean–Atmosphere–Land System model, Spectral Version 2（FGOALS-s2）. The model simulates similar spatial warming patterns in all three warm periods, e.g. stronger warming appears in the high latitudes. However, changes in surface air temperature（SAT） over the tropical regions are different： a significant warming occurs in the 20 CW and MWP but a significant cooling in the MH. The heat budget analysis suggested that SAT changes are mainly induced by the heat flux. In the MH, the insolation and positive snow and ice feedback are responsible for the warming in the Southern Ocean but the wind anomalies and decreased downward longwave radiation（DLR） induce the cooling in the tropics. In the 20 CW, the decreased shortwave radiation and increased sea surface temperature dependency of evaporation dampen the warming in the tropics. In the MWP, the shortwave radiation induces the Southern Ocean warming, but the DLR and wind anomalies warm the SAT in the tropics. The simulated ocean temperature and ocean heat content anomalies are different in the upper ocean（above 1500 m）, which are mainly induced by the wind stress changes, but similar in the deep ocean in all three warm periods.本文利用FGOALS-s2的四组试验,对比了三个典型温暖时期:中全新世时期、中世纪暖期和20世纪增暖期的基本增暖模式,并进行了热收支分析。发现模式模拟的三个暖期的增暖有一些类似的分布,例如:在高纬度特别是南大洋区域都出现了强的增暖。但在热带地区的变化存在差异:中世纪暖期和20世纪增暖期在热带地区存在显著的增暖,但是中全新世时期在热带地区变冷。热收支分析表明大气表层温度的变化主要是由热通量引起的。模式模拟的三个暖期的上层海洋温度和热含量的变化也不相同,主要是由风应力的变化引起的,但深层海洋温度的变化是一致的。

关 键 词：Surface air temperature heat flux MID-HOLOCENE Medieval warm period twentieth century warming 

分 类 号：P467[天文地球—大气科学及气象学] TS976.15[轻工技术与工程]