摘要
利用2004年开展的"金塔绿洲系统能量与水分循环过程观测试验(JTEX)"所取得的资料和中尺度气象模式MM5对西北地区金塔绿洲系统进行了数值模拟研究,模拟结果较好地反映了绿洲-沙漠系统的气象场和辐射场。模拟结果显示,绿洲、沙漠的短波辐射和净辐射具有明显的日变化,而长波辐射的日变化则不很明显;绿洲、沙漠的向下短波辐射相似,峰值在1 050 W.m-2左右;绿洲向上短波辐射峰值略小,约166 W.m-2,沙漠向上短波辐射峰值约261 W.m-2;绿洲、沙漠的长波辐射相差不大,全天基本上分布在300 W.m-2左右;绿洲净辐射峰值约914 W.m-2,大于800 W.m-2左右的沙漠地区。净辐射在沙漠或绿洲同种地表类型上基本与区域一致,分布均匀,下垫面上数值相差不超过10 W.m-2。白天不同下垫面上的净辐射有较大的差别,最大差异可达100W.m-2。
Using the data derived from the ＂2004 Jinta Oasis System Energy and Water Cycle Field Experiment（JTEX）＂, a simulation of surface radiation balance over the Jinta oasis has been worked out with the MM5 mesoscale model. The research results show that meteorological and radiation fields of the oasis-desert system can be well simulated. The results also indicate that short wave radiation and net radiation in the oasis and desert have obvious diurnal variation, while it is not very obvious for long wave radiation. The downward short wave radiations in desert and oasis are similar with the maximum of approximately 1 050 W. m^-2. While the maximum of upward short wave radiation in oasis is small at about 166 W. m^-2, which in desert is 261 W. m^-2. Meanwhile, the difference between long wave radiation in desert and that in oasis is not large, and the value of radiation is around 300 W. m^-2 all day. The maximum of net radiation in oasis with about 914 W. m^-2 is larger than that in desert with about 800 W. m^-2. The net radiation on the same underlying surface is almost of the same and is distributed uniformly, and the difference in the same underlying surface is no more than 10 W. m^-2. Whereas the difference in different underlying surface is large during the day and the most difference is near 100 W. m^-2.
出处
《中国沙漠》
CSCD
北大核心
2010年第3期686-690,共5页
Journal of Desert Research
基金
黄土高原土壤侵蚀与旱地农业国家重点实验室基金项目(10501-221)资助
关键词
绿洲-沙漠系统
辐射
MM5
oasis-desert system
radiation
MM5 mesoscale model
