| 辽宁冬季气温变化特征及与东亚冬季风的关系 |
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| 引用本文： | 房一禾,张运福,邵鹏程,周放,赵连伟,姜鹏,于杨.辽宁冬季气温变化特征及与东亚冬季风的关系[J].气象与环境学报,2014,30(1):57-63. |
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| 作者姓名： | 房一禾 张运福 邵鹏程 周放 赵连伟 姜鹏 于杨 |
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| 作者单位： | 1.沈阳区域气候中心，辽宁 沈阳110163；2.国家气候中心，北京100081；3.南京信息工程大学 气象灾害省部共建教育部重点实验室，江苏 南京210044；4.辽宁省气象学校，辽宁 沈阳110136；5.辽宁省气象信息中心，辽宁 沈阳110136 |
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| 基金项目： | 公益性行业（气象）科研专项“近百年全球陆地气候变化监测技术与应用”（GYHY201206012）资助. |
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| 摘 要： | 采用1961-2012年辽宁省53站月平均气温资料及NCEP/NCAR再分析的月平均高度场、风场和海平面气压场资料，分析了近51 a来辽宁冬季气温的时空变化特征。在归纳并计算了前人定义的六种东亚冬季风指数的基础上，对比了辽宁冬季气温与这6种东亚冬季风指数的关系。结果表明：1961-2011年辽宁东部冬季气温均方差大于西部，全省绝大部分地区为显著的正趋势；辽宁冬季气温EOF第一模态表现为全省一致异常偏高或偏低的特征；时间系数显著上升，于1977年发生突变；并存在4.5 a、2 a和3 a的周期变化；朱艳峰定义的东亚冬季风指数是各指数中与辽宁冬季气温变化关系最紧密的指数，它无论从突变时间、周期特征、相关系数还是反位相对应关系上，都与辽宁冬季气温关系最密切，且850 hPa经向风场和海平面气压场也能说明二者有较好的对应关系。
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| 关 键 词： | 东亚冬季风指数 EOF 最大熵谱分析 |
Variation characteristics of winter air temperature in Liaoning province and its relations with East Asia winter monsoon |
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| FANG Yi-he ZHANG Yun-fu,SHAO Peng-cheng,ZHOU Fang,ZHAO Lian-wei,JIANG Peng,YU Yang.Variation characteristics of winter air temperature in Liaoning province and its relations with East Asia winter monsoon[J].Journal of Meteorology and Environment,2014,30(1):57-63. |
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| Authors: | FANG Yi-he ZHANG Yun-fu SHAO Peng-cheng ZHOU Fang ZHAO Lian-wei JIANG Peng YU Yang |
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| Institution: | 1. Shenyang Regional Climate Center, Shenyang 110166, China; 2.National Climate Center, Beijing 100081, China; 3.Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, China; 4. Meteorological School in Liaoning Province, Shenyang 110166, China; 5.Meteorological Information Center in Liaoning Province, Shenyang 110166, China |
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| Abstract: | Based on the monthly mean temperature data from 53 observational stations in Liaoning province during 1961 to 2012 and the NCEP/NCAR reanalysis data such as the monthly mean height field,wind field and sea sur- face pressure, the spatial and temporal features of the winter air temperature were analyzed. The previous defini- tions of six East Asian winter monsoon indexes were reviewed and calculated, and the relationships of winter air temperature in Liaoning province with the six indexes were compared. The results show that the mean variance of winter air temperature is greater in the eastern region than in the western region during 1961 to 2011 ,and it is in a significant positive trend in most regions of Liaoning province. The first pattern of EOF shows that winter air tem- perature in Liaoning province is abnormal high or low. The time coefficient is in a significant increasing trend and the abrupt change occurs in 1977. There are cycles of 4. 5 years,2. 0 years and 3.0 years for winter air temperature in Liaoning province. The East monsoon index defined by Zhu has the best relationship with winter air temperature in Liaoning province regardless of the abrupt change time, periodic characteristics, correlation coefficients and in- verting corresponding relations. The relationship can be clearly explained in 850 hPa meridional wind field and sea surface pressure field. |
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| Keywords: | East Asian winter monsoon index EOF （empirical orthogonal function） Maximum entropy spectrumanalysis |
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