东亚地区小冰期气候的模拟

本文使用ECHO-G全球气候模式对1550～1850年的小冰期气候进行了300个模式年的模拟，着重分析了东亚地区小冰期的温度变化特征，并与目前所得到的小冰期气候重建结果进行了对比。结果表明，在考虑了太阳辐射、火山活动、CO2和CH4等主要气候影响驱动因子的条件下，较好地模拟出了东亚地区的小冰期气候特征，并与其它手段的气候重建结果相吻合，显示太阳活动和火山活动是小冰期气候形成的主要原因。

CLIMATE SIMULATION OF LITTLE ICE AGE OVER EASTERN ASIA

With a state of the art, ocean and atmosphere coupled climate model ECHO-G, the climate during the Little Ice Age (LIA), from 1550 to 1850 has been simulated under the external forcing of time varying solar radiation, volcanic-aerosol, CO_ 2and CH_ 4. Based on the model output, the temperature variation features in the eastern Asia during the LIA has been analyzed as a main climate element and compared with the results of reconstructions of climate during the LIA from other authors. It is shown that the ECHO-G simulation of climate during the time of LIA in eastern Asia with the forcing of solar radiation, volcanic activity and green house gases (CO_ 2and CH_ 4) is consistent with what have been reconstructed from a lot of proxy data, such as ice core, tree rings, historical documents and loess. The dynamical analysis of the modeling results shows that the main factors which controlledand formed cool climate during LIA both in the global and the eastern Asia area are solar activity and volcanic activity. Meanwhile, the relationships between global, northern Hemisphere and eastern Asia temperature variations are explored.