【摘要】 末次盛冰期(LGM)是古气候学研究的热门时期之一,很多学者采用不同的研究方法探讨了该时期气候环境变量的特征和变化,尽管各自的侧重点有所不同,某些结论也尚不一致,但是目前初步形成了关于LGM时期的很多共识。针对近20年来不同学者利用重构数据和数值模式模拟等方法对LGM时期开展的研究工作,从物理海洋研究的角度和需求,对LGM时期的地形分布、大气辐射和CO2浓度、海冰和陆地冰川分布、海表面温度以及海洋环流等主要物理要素进行系统描述,总结了LGM时期气候环境的基本特征。结果发现LGM时期海洋表层温度降低,但存在着区域性的温度升高,深海海洋各大洋温度更趋于一致性,冰川受季节性影响较大,主要差别在于北半球,大西洋经向翻转流和南极绕极流的强度仍存在争议。随着LGM时期气候变化研究的深入,关于该时期气候环境基本特征的认识也会继续得以深化和完善,关于过去20年间LGM时期气候要素研究的综述也会对后续数据重构和数值模拟工作具有一定的参考作用。更多还原

【Abstract】 The Last Glacial Maximum(LGM) is one of the most suitable time periods for paleoclimate researchers and different methods have been used to obtain the characteristics of environmental variables in that period.While many features and arguments on LGM period are still in dispute,some basic agreements have been reached through the progress of last 20 years.In this paper,many physical elements which stand for the basic characteristics of climate in LGM period,including the topography,radiance,atmosphere CO2 concentration,land-sea mask,sea surface temperature(SST) and ocean circulation,have been described systematically by compiling the results of LGM reconstruction with new proxies and model simula-tions in past 20 years to provide a front-row seat for the paleoceanography study in China.We found that the global SSTs in LGM period were cooling overall,but a few warming signals occurred at some particular regions:deep ocean temperatures were relatively homogeneous:the glaciers had significant seasonal variation mainly in the Northern Hemisphere:the strength of the Atlantic MeridionalO verturning Circulation(AMOC) and the Antarctic Circumpolar Current(ACC) was still in dispute.Definitely,the knowledge about LGM period should be broadened and deepened with the further increasingresearch.This review may provide a valuable reference to the following researches about data reconstruction and model simulation in China.更多还原