| 影响中国东北地区气候的关键区、关键时段和关键因子 |
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| 引用本文： | 孙凤华,李丽光,张耀存.影响中国东北地区气候的关键区、关键时段和关键因子[J].地理科学,2011,31(8):911-916. |
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| 作者姓名： | 孙凤华 李丽光 张耀存 |
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| 作者单位： | 1. 中国气象局沈阳大气环境研究所, 辽宁 沈阳 110016;2. 南京大学大气科学学院, 江苏 南京 210093 |
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| 基金项目： | 财政部/科技部公益类行业专项(GYHY200706005)资助 |
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| 摘 要： | 使用东北地区近50多a(1956~2007年)气温和降水数据及相关研究成果,研究和总结并分析影响中国东北地区夏季气温、夏季降水、冬季气温的关键区、关键时段和关键因子。东北夏季较多降水主要发生在极涡偏心、东亚高纬阻塞高压盛行、副热带高压偏西偏北、青藏高原上空西风急流中心强度偏强的环流系统配置下;东北夏季低温主要出现于伊朗高压和南亚高压区域高度场为负距平、上一年10月极涡中心强度正常或偏强、夏季副热带高压强度偏弱位置偏东、偏南时;西伯利亚高压和阿留申低压均偏强(偏弱)、前期北大西洋海温偏低(偏高)对应东北地区的冷(暖)冬年。
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| 关 键 词： | 东北地区 气候 影响因子 |
| 收稿时间： | 2010-10-29 |
| 修稿时间： | 2010-12-09 |
Key Zone,Key Period and Key Factor Influencing Climate in Northeast China |
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| SUN Feng-hua,LI Li-guang,ZHANG Yao-cun.Key Zone,Key Period and Key Factor Influencing Climate in Northeast China[J].Scientia Geographica Sinica,2011,31(8):911-916. |
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| Authors: | SUN Feng-hua LI Li-guang ZHANG Yao-cun |
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| Institution: | 1. Institute of Atmospheric Environment, China Meteorological Administration, Shenyang 110016, China;2. School of Atmospheric Sciences, Nanjing University, Nanjing 210093, China |
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| Abstract: | Based on air temperature and precipitation data in Northeast China during 1956 to 2007 as well as the related literatures at home and abroad, the key zone, key period and key factor influencing summer and winter air temperature and summer precipitation were analyzed and summarized. Summer precipitation often occurs in Northeast China under some circumfluence conditions, such as the polar vortex oscillation, the prevailing East Asia blocking high, the westward or northward subtropical high, the strong westerly jet center over Tibetan Plateau. On the other hand, low temperature in summer often appears in Northeast China when height field is negative anomaly over Iran high and South Asia high regions, polar vortex center intensity of last October is normal and strong, subtropical high intensity was weak and its location was eastward or southward in summer. Colder/warmer winter in Northeast China is related with the strong/weak Siberian high and Aleutian low, low/high prophase sea surface temperature of North Atlantic. |
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