通过 4组数值敏感性试验 ,利用BIOME3生态模式对末次盛冰期中国大陆植被分布状况进行了数值模拟 ,再次研究了该时期青藏高原大范围冰盖存在的可能性问题。结果表明 ,末次盛冰期大陆植被发生了大规模的变化 ,总体呈退化趋势 ;在降温 5℃、降水减少 1 0 %、二氧化碳下降 1 45× 1 0 - 6和地球轨道参数轻微变化的情况下 ,青藏高原约 1 /2的地区已经被冰覆盖 ;进一步的降温和干燥则会加大高原冰的覆盖面积和大陆其余地区植被的退化 Four groups of numerical sensitivity experiments were used to simulate the distribution of vegetation in the Chinese mainland during the last ice age by BIOME3 ecological model. The possibility of the existence of large-scale ice sheets in the Qinghai-Tibet Plateau was studied again. The results showed that there was a large-scale change in the vegetation in the last glacial period, which showed a general trend of degeneration. Under the conditions of 5 ° C cooling, 10% reduction of precipitation, 1 45 × 10 -6 carbon dioxide drop and slight changes of orbital parameters, About a quarter of the Qinghai-Tibet plateau has been covered by ice; further cooling and drying will increase the coverage of plateau ice and the degradation of vegetation in the rest of the continent