亚洲季风变迁与全球气候的联系  

Asian monsoon change and its links to global climate

作　　者：安芷生[1] 孙有斌[1] 蔡演军[1] 周卫健[1] 沈吉[2] 

机构地区：[1]中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,西安710061 [2]中国科学院南京地理与湖泊研究所,南京210008

出　　处：《地球环境学报》2017年第1期1-5,共5页Journal of Earth Environment

基　　金：科技部;国家自然科学基金委员会;中国科学院;国际大陆钻探计划;中美重大国际合作计划的联合资助

摘　　要：通过研究冰期-间冰期至百年尺度亚洲季风的演变特征,阐明了季风变化同南北半球冰量、太阳辐射、大洋环流、热带辐合带等气候系统内外部因子的动力联系。在海-陆-气相互作用的框架下提出了"冰期-间冰期印度季风变化动力学"新理论,揭示大西洋经向环流对东亚季风突变事件的影响和动力过程,探讨了全新世亚洲季风变化的时空特征和控制因素。该项成果以亚洲季风变迁历史和机理为主线,从地球系统科学的视角,将亚洲古季风研究拓展为多尺度与多动力因子、区域与全球相结合的集成研究,推动了与季风相关的过去全球变化科学的发展。As an integral part of the global climate system, the Asian monsoon has played a key role in linking climatic changes between high- and low-latitude regions. Monsoon-induced precipitation changes have significant impacts on the living environment in densely populated East Asia, especially in the context of global warming. Thus, investigating natural variability and dynamics of the Asian monsoon is essential for promoting a sustainable global future, because the monsoon-related hydrological cycle plays a critical role in global ecological and social systems. This project focuses on past monsoon variability and its dynamical links to global climate, and attempts to provide a natural analog for the current interglacial climate and a scientific basis for future climate projections. The major findings are as follows： By investigating Chinese loess, speleothem, lake and peat deposits, the research team employed multiple proxies to reconstruct Indian and East Asian monsoon variability on glacial-interglacial to centennial timescales. The team generated a high-resolution continental record of the Indian monsoon variability spanning the last 2.6 Ma from a paleolake in southwestern China; demonstrated the high degree of similarity between abrupt temperature-wind-precipitation changes during the last glaciation between high- and middle-latitudes; and produced a synthesis of speleothem-lake-peat records in order to address the spatiotemporal variability of the Holocene summer monsoon. Through integration of various proxies and model results, the team addressed the importance of interhemispheric forcing in driving Indian summer monsoon variability on glacial- interglacial timescales; confirmed the influence of Atlantic meridional overturning circulation （AMOC） on abrupt monsoon changes; and deciphered the asynchronous nature and drivers of the weakening of the Holocene monsoon. These findings demonstrate that multiscale monsoon variability is dynamically linked to external （Solar insolation and outputs） and internal

关 键 词：亚洲季风 全球气候 全新世 千年尺度 大洋环流 热带辐合带 全球变化科学 气候系统 经向环流 南北半球 

分 类 号：P425.42[天文地球—大气科学及气象学]