Solar forced transient evolution of Pacific upper water thermal structure during the Holocene in an earth system model of intermediate complexity  

作　　者：WANG Yue JIAN ZhiMin ZHAO Ping DANG HaoWen XIAO Dong 

机构地区：[1]State Key Laboratory of Marine Geology,Tongji University [2]National Meteorological Information Center [3]Institute of Climate System,Chinese Academy of Meteorological Sciences

出　　处：《Chinese Science Bulletin》2013年第15期1832-1837,共6页

基　　金：supported by the National Basic Research Program of China (2007CB815901);the National Natural Science Foundation of China (41023004 and 91028004)

摘　　要：Forced by transient solar activities since 7 ka,the thermal structures of the Pacific upper water at boreal winter are featured by an enhanced response of 3-dimensional Western Pacific Warm Pool(WPWP) in an Earth system model of Intermediate Complexity at centennial scales.During solar maximum periods,the magnitude of surface ocean temperature variations is 30% larger in the western tropical Pacific than in the Ni o3 region,while at subsurface,it is 40% larger in the subtropical North Pacific than in the western Equatorial Pacific.They compromise stronger zonal and meridional thermal gradients in surface and subsurface Pacific respectively which are both linearly responded to solar forcing at centennial periods.The surface gradient is most sensitive at 208-year period while the subsurface gradient shows more significance at periods longer than 208-year.Also noteworthy are two differences:(1) the phase lags at these periods of surface gradient are slightly smaller than that of subsurface;(2) the 148-year and 102-year periods in surface gradient are lost in subsurface gradient.These modeled features preliminary confirm the centennial fluctuations of WPWP in paleo-proxies and a potential solar forcing during the Holocene.Forced by transient solar activities since 7 ka, the thermal structures of the Pacific upper water at boreal winter are featured by an enhanced response of 3-dimensional Western Pacific Warm Pool （WPWP） in an Earth system model of Intermediate Complexity at centennial scales. During solar maximum periods, the magnitude of surface ocean temperature variations is 30% larger in the western tropical Pacific than in the Nifio3 region, while at subsurface, it is 40% larger in the subtropical North Pacific than in the western Equatorial Pacific. They compromise stronger zonal and meridional thermal gradients in surface and subsurface Pacific respectively which are both linearly responded to solar forcing at centennial periods. The surface gradient is most sensitive at 208-year period while the subsurface gradient shows more significance at periods longer than 208-year. Also noteworthy are two differences： （1） the phase lags at these periods of surface gradient are slightly smaller than that of subsurface; （2） the 148-year and 102-year periods in surface gradient are lost in subsurface gradient. These modeled features preliminary confirm the centennial fluctuations of WPWP in paleo-proxies and a potential solar forcing during the Holocene.

关 键 词：西太平洋暖池 地球系统 太阳能 全新世 热结构 瞬态 上层 海洋表面 

分 类 号：P531[天文地球—古生物学与地层学]