南京大学学报(自然科学版) ›› 2010, Vol. 46 ›› Issue (6): 631642.
高红霞, 汤剑平**
Gao Hong X ia, T ang Jian Ping
摘要: 利用我国近 600 个地面测站的逐日温度观测资料、 美国国家环境预报中心和美国大气科学研究中心再分析资料的大尺度气候变量, 采用基于多元线形回归的统计降尺度方法, 对 1970- 1999 年我
国 1月和 7月的月平均地面温度进行了统计降尺度分析, 并将统计降尺度模型应用于未来气候情景下, 对 21 世纪 3 个时段(2010- 2039, 2040- 2069, 2070- 2099)的地面温度变化进行预估, 对比分析了 A2
排放情景下多个模式的降尺度效果. 结果表明, 基于多元线性回归的统计降尺度方法在我国地面温度的模拟分析中是合理可用的. 对于当前时段的模拟, 降尺度方法能够明显改善模式对地面温度的模拟效
果, 并且东部好于西部, 平原好于山地, 尤其是 7 月份, 当各模式对地面温度的模拟结果与观测资料相差较大的情况下, 降尺度方法仍然能得到较好的结果; 对于未来气候情景的预估方面, 大部分站点温度都
表现为明显的上升趋势, 并且升温幅度北方高于南方, 西部高于东部.
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