中国东部季风区末次冰期以来古气候模拟

通过对我国东部季风区现代青土样品孢粉组合与气候因子间的回归分析，分别建立了孢粉组合与一月，七月气温和年降水量的转换函数，进而建立了本区末次冰期以来的孢粉－气候数据库，模拟末次冰期盛冰期，消冰期，全新世前北方期－北方期，大西洋期，亚北方期等五个古气候期的冬季和夏季温度场，降水场。

SIMULATIONS OF PALEOCLIMATE IN THE EAST CHINA MONSOON AREA SINCE THE LAST GLACIATION

In this paper, the east China monsoon area was employed to be a study region. First of all, to meet the need of numerical simulations, the transfer functions between sporopollen assemblage and mean temperature of January and July as well as annual mean precipitation are established based upon regression analyses of the relationship between sporopollen assemblage from modern surface soil and climatic factors such as temperature and precipitation. Mathematically, the relationship between them is linear. Based on this, a great deal of sporopollen data dated by radio carbon isotope from this area were construed into pollen climate parameters, consequently, the pollen climate data of this are since the Last Glaciation are simulated. Conclusively, utilizing these data from pollen climate database, the temperature and precipitation field of the last Glacial Maximum, Last Deglaciation, and Holocene Pre Boreal phase, Atlantic phase, Sub Boreal phase were simulated quantitatively. The results are as the following: 1) Not only in the Last Glaciation Maximum, but also in Holocence Maximum, the climatic deviations of this area differed greatly from other continents, among them,the detemperature range in the Last Glacial Maximum was Smaller than that of Europe, whereas the risetemperature range in the Holocene Maximum was larger than that of Europe; 2) As much in Last Glaciation as in Holocene,the latitudial zonality of temperature and precipitation existed already,characterized by high temperature in south and low in north,and much precipitation in south and less in north; 3) In this area, the assemblage of humidity and thermal energy was also coincident with that of nowadays,characterized by synchronization of high temperature and ample precipitation.