青藏高原全新世古季风变化的花粉证据

POLLEN EVIDENCE OF CHANGING HOLOCENE MONSOON ON QINGHAI-XIZANG PLATEAU

本文在青藏高原１４个点的全新世孢粉资料基础上，以５个点为典型，对青藏高原全新世的古季风变化作了探讨。研究表明，全新世夏季风在高原中西部及高原东部具有相似的变化趋势，都经历了增强→强盛→减弱但仍活跃→萎缩几个变化阶段，这些阶段的发生时间在高原基本上是一致的。此研究结果与大气环流模型预测的结果相似。

The changing Holocene monsoon was explored based on 5 typical pollen records with data from 14 sites on the Qinghai-Xizang Plateau.Results show that Holocene monsoon experienced similar changes in the mid-west and east of Qinghai-Xizang Plateau,from strengthening to strong to weakening but still active,and then to shriveling.The timing of these periods began and ended simultaneously overall on the Qinghai-Xizang Plateau.This changing trend is similar to that resulting from model simulations.