ZHOU Ning.The Spatial Characters of Blocking over Eurasia and its Impact on Temperature of China[J].Journal of Chengdu University of Information Technology,2016,(04):419-424.
冬季欧亚阻塞高压的空间特征及其对中国温度的影响
- Title:
- The Spatial Characters of Blocking over Eurasia and its Impact on Temperature of China
- 文章编号:
- 2096-1618(2016)04-0419-06
- Keywords:
- meteorology; climate change; blocking; geopotential height field; temperature field; temperature anomalies; meridian size
- 分类号:
- P466
- 文献标志码:
- A
- 摘要:
- 为进一步了解阻塞高压与冬季中国温度的关系,利用NCEP/NCAR再分析资料,采用阻塞高压指数(TM指数)挑选出1950/1951～2014/2015年冬季发生在乌拉尔山、贝加尔湖以及鄂霍次克海的阻塞事件,研究3个区域阻塞的特点以及对中国区域造成的不同影响。结果表明:乌拉尔山阻塞事件发生次数最多,主要造成中国新疆北部地区强降温,其阻塞经向范围与新疆西北温度异常呈现负相关。贝加尔湖阻塞事件次数最少,且阻塞平均强度最弱,主要使华中华北地区发生强降温,但阻塞经向范围不直接与温度相关。鄂霍次克海阻塞平均强度最强,主要导致中国东北地区低温异常,其阻塞经向范围与华中华北区域呈负相关。
- Abstract:
- To further understand the relationship between blocking events and the temperature changes China, based on the NCEP/NCAR reanalysis data, the blocking events observed over Ural, Baikal and Okhotsk have been picked out in winter during 1950/1951-2014/2015 by using the index of blocking(TM index). The conclusions indicated that: Ural blocking the most blocking events, it would lead to the low temperature in northern of Xinjiang its meridian size of blocking ha negative correlation with temperature of northwest Xinjiang. The least blocking events and intensityt would cause the low temperature in Middle of China, but its size not directly related to temperature. The strongest blocking Okhotsk, it would low temperature in Northeast China, and its size ha negative correlation with temperature of Middle and North China.
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备注/Memo
收稿日期:2016-01-03 基金项目:公益性行业(气象)科研专项资助项目(GYHY201306022)