| 夏季青藏高原地区降水和低涡的数值预报试验 |
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| 引用本文： | 陈伯民,钱正安.夏季青藏高原地区降水和低涡的数值预报试验[J].大气科学,1995,19(1):63-72. |
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| 作者姓名： | 陈伯民 钱正安 |
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| 作者单位： | 中国科学院兰州高原大气物理研究所,兰州 730000 |
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| 基金项目： | 国家气象局青藏高原气象基金资助课题 |
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| 摘 要： | 本文首先分析了１９７９年６—７月的ＦＧＧＥIIIｂ级资料风场和相对湿度场在青藏高原地区的偏差，指出在高原西部应予以订正。然后利用一有限区域模式，通过综合订正初始风场和相对湿度场，改进模式部分物理过程，并提高其水平分辨率，共设计了６组预报试验，对该年的两例高原低涡切变线降水过程进行了２４小时预报。结果表明，利用改进了的初始场和部分物理过程，可明显改善高原地区的降水预报，并在一定程度上改善了流场的预报，即上述改进方案是可行的；但在高原地区嵌套预报方案尚待修改，还应继续努力提高模式对高原低涡流场的预报能力。
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| 关 键 词： | 青藏高原 数值预报 初始场 物理过程 水平分辨率 |
Numerical Tests for Predicting the Precipitation and Vortices over the Tibetan Plateau in Summer |
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| Chen Bomin and Qian Zhengan.Numerical Tests for Predicting the Precipitation and Vortices over the Tibetan Plateau in Summer[J].Chinese Journal of Atmospheric Sciences,1995,19(1):63-72. |
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| Authors: | Chen Bomin and Qian Zhengan |
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| Abstract: | This paper first analyzes the differences of the wind and relative humidity fields of FGGE level-IIIb data set for the period from June to July 1979 over the Tibetan Plateau from the truth and reveals the necessity to revise the data set over the west of the Plateau.Then,the initial wind and relative humidity fields in a regional model is corrected,parts of its physical processes modified,and its horizontal resolution inereased.Six predicting experiments are designed.A set of 24-h forecasts of two Plateau vortex/shear line precipitation cases are carried out.The results show that:the precipitation forecast over the Plateau can be clearly improved by modifying thd initial field and model Physics.The now field can also be improved to some extent.This shows that the above modification schemes are feasible.However,the nesting scheme of the model over the Plateau remains to be modified.The next efforts should focus on improving the forecast skill for the Plateau vortex now field. |
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| Keywords: | Tibetan Plateau numerical prediction initial field model physics horizontal resolution |
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