9000年前古气候的数值模拟研究

Numerical Simulation of the Climate 9000 Years ago

本文用大气物理所的全球大气环流模式模拟了9000年前一月份和七月份的古气候.得出:北半球夏季由于地球轨道参数的变化引起的比现在多7％的太阳辐射使得温度升高了,尤其是高纬地区,海陆对比的加强又增强了季风,季风区域降水增加了;而冬季因为太阳辐射在北半球减少了7％,温度变低了.这些结果与现有的古气候证据相一致,并与其他模拟结果进行了较详细的比较,还作了进一步的讨论.

The January and July climates 9000 years ago was simulated with the IAP AGCM. The seven percent more solar radiation than present absorbed in the Northern Hemisphere summer caused by the orbital parameter changes makes the earth's surface temperature higher, especially in high latitude region. The enhanced landsea contrasts cause a stronger summer monsoon, and the precipitation in the monsoon region is also reinforced. The Northern Hemisphere winter temperature is lowered by the weaker absorption of solar radiation. These results qualitatively agree with palaocJimatic evidences. And finally, the careful comparisons with other modeling results and further discussions are made in this paper.