信风驱动的中国季风区石笋δ^(18)O与大尺度温度场负耦合——从年代际变率到岁差周期的环流效应(纪念GNIP建网50周年暨葫芦洞石笋末次冰期记录发表10周年)  

TRADE-WIND DRIVEN INVERSE COUPLING BETWEEN STALAGMITE δ^(18)O FROM MONSOON REGION OF CHINA AND LARGE SCALE TEMPERATURE——CIRCULATION EFFECT ON DECADAL TO PRECESSIONAL TIMESCALES

作　　者：谭明[1,2] 

机构地区：[1]中国第四纪科学研究会高分辨率气候记录专业委员会,北京100029 [2]中国科学院地质与地球物理研究所新生代地质与环境重点实验室,北京100029

出　　处：《第四纪研究》2011年第6期1086-1097,共12页Quaternary Sciences

基　　金：国家重点基础研究发展规划项目(973)(批准号:2010CB950201);中国科学院战略性先导科技专项项目"应对气候变化的碳收支认证及相关问题"(批准号:XDA05080501);国家自然科学基金项目(批准号:41030103);科技基础性工作专项项目(批准号:2011FY120300)共同资助

摘　　要：中国季风区很多单点石笋氧同位素记录与集成的大区域温度场在长时间尺度上呈负耦合变化模式。通过理论计算和观测记录校准分析,温度效应和雨量效应均不能加以解释。从环流效应角度分析,发现信风张弛既控制了中国季风区石笋δ^(18)O的主要变化趋势,也决定了西太平洋暖池的温度高低和面积大小,而后者在很大程度上影响着全球温度的走向,因此可确认,二者的负耦合是信风决定的"一因二果"。进而分析了中国季风区石笋δ^(18)O短尺度环流效应响应于ENSO循环的机理,并在此基础上,借助模式结果,将环流效应概念推广到轨道尺度,由此获得中国季风区石笋δ^(18)O序列缺失偏心率周期等问题的初步解答。Many stalagmite oxygen isotope records from China monsoon regions inversely couple with integrated largescale temperature on long-term time scale. This phenomenon is hard to be explained as temperature effect or amount effect by the analysis of theoretical calculation and calibration with observed records. Analyzing with the concept of circulation effect, it is found that the relaxation of the trade wind controls both the major changes in the stalagmite δ18O from Chinese monsoon regions and the temperature anomalies of the Western Pacific warm pool which largely affect the global temperature trend. Therefore, it could be confirmed that the inverse coupling between the two is determined by the trade winds （ i. e. ＂ one reason, two results＂）. In addition, the mechanism of ：response of circulation effect to ENSO cycle for the stalagmite δ18O from China monsoon regions is then analyzed or, short-term scales. With the simulated results, the concept of circulation effect is further promoted to orbital scales. Accordingly, more understanding of some paleoclimate questions could be obtained such as ＂why does the stalagmite δ18O from China monsoon regions lack lOOka eccentricity cycles？＂

关 键 词：信风 环流效应 温度场 石笋δ18O 中国季风区 岁差 

分 类 号：P46[天文地球—大气科学及气象学] P532