| 中国西北夏季干湿特征分析 |
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| 引用本文： | 陆燕,焦海军,陆建国,贾婧. 中国西北夏季干湿特征分析[J]. 山西气象, 2007, 0(2): 15-17 |
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| 作者姓名： | 陆燕 焦海军 陆建国 贾婧 |
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| 作者单位： | 山西省平陆县气象局，山西省平陆县气象局，山西省平陆县气象局，山西省孝义市气象局 山西 平陆 044300，山西 平陆 044300，山西 平陆 044300，山西 孝义 032301 |
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| 摘 要： | 近45 a来中国西北夏季干湿的长期变化趋在不同的分区内有所差异,但位于西北西部的地区目前正处于偏湿阶段,而西北东部的地区目前正处于偏干阶段,同时整个西北地区近45 a来偏旱的年份多于偏湿的年份;东亚大槽比较稳定、深厚、新疆脊强,副热带高压偏东偏南是中国西北干旱年500 hPa高度场的显著特点,而东亚大槽比较浅薄、新疆脊比较弱,副热带高压偏西偏北是湿润年500 hPa高度场的显著特点。
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| 关 键 词： | 干旱指数 干湿特征 环流特征 |
| 修稿时间： | 2006-06-13 |
Analysis of the Summer Dry/wet Characteristic in Northwest China |
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| Lu Yan,Jiao Haijun,Lu Jianguo,Jia Jing. Analysis of the Summer Dry/wet Characteristic in Northwest China[J]. Shanxi Meteorological Quarterly, 2007, 0(2): 15-17 |
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| Authors: | Lu Yan Jiao Haijun Lu Jianguo Jia Jing |
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| Affiliation: | 1. PInglu County MeteoroloRy Bureau of Shanxi Province, PInglu, Shanxi, 044300; 2. Xlaoyi Meteorology Bureau of Shanxi Province, Xiaoyi, Shanxi, 032301 |
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| Abstract: | There are defferent trends of summer precipitation change between the sub-regions of Northwest China in recent 45a.The west of Northwest China is at a wet phase,but the east at dry phase.The dry years are more than the wet years in the whole region.The distinct characteristic of 500 hPA of dry year is that East Asia trough is steadier and deeper,the Xinjiang ridge is stronger and the Sub-tropical High is easterlier and southlier. by contraries,there will be wet year. |
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| Keywords: | Drought index Dry/wet Characteristic Circulation characteristic |
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