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采用耦合了陆面过程的9层15波菱形截断全球大气环流谱模式(AGCM+SSiB),引入全球最新的6和21ka时陆面植被分布,并转换成模式格点值,开展了系统的6和21ka古气候模拟试验。结果表明,该模拟设计得出了较真实的气候特征,并揭示出太阳辐射和下垫面植被是中全新世气候格局的主控因子,而海温和北半球两大冰流则是末次盛冰期气候的主控因子。植被场改变对模拟结果影响的显著性检验表明,6ka时植被的改变对降水、温度和海平面气压场的模拟均有显著影响,而21ka时植被影响的显著性区域较小,且比较零散,说明寒冷气候时期对植被强迫改变的敏感性没有温暖气候时期大。
A total of 9 layers of 15-diamond rhombic truncated global atmospheric circulation spectral patterns (AGCM + SSiB) coupled with land surface processes were introduced to introduce the global distribution of land surface vegetation at 6 and 21 ka and converted into pattern grid values And 21ka paleoclimate simulation test. The results show that the simulation results in more realistic climatic characteristics and reveals that solar radiation and underlying vegetation are the dominant controlling factors of the mid-Holocene climatic pattern, whereas the SST and the two northern ice streams are the last glacial climate The master factor. The significant test of the effects of vegetation field changes on the simulation results shows that the changes of vegetation at 6 ka have a significant effect on the simulation of precipitation, temperature and sea level pressure field, while the significant area of vegetation impact at 21 ka is smaller and more scattered, Indicating that during the cold climate sensitivity to forced changes in vegetation without a warm climate period.