| 蒙古气旋的气候特征及变化研究 |
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| 引用本文： | 王新敏,江志红,翟盘茂,范学峰,鲁坦.蒙古气旋的气候特征及变化研究[J].河南气象,2007(1). |
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| 作者姓名： | 王新敏 江志红 翟盘茂 范学峰 鲁坦 |
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| 作者单位： | 南京信息工程大学，南京信息工程大学，国家气候中心，河南省气象台，河南省气象台 江苏南京210044，河南省气象台，河南郑州450003，江苏南京210044，北京100081，河南郑州450003，河南郑州450003 |
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| 基金项目： | 河南省气象局重点科研项目(Z200603)资助 |
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| 摘 要： | 基于1979-2001年ECMWF海平面气压(SLP)再分析资料,采用改进的气旋客观识别与追踪算法,计算分析了蒙古气旋的频数及强度,结果表明,蒙古气旋活动存在明显的季节、年际和年代际变化。1979-2001年,蒙古气旋频数减少,强度减弱。20世纪80年代中期,蒙古气旋活动最强,80年代末开始到90年代,蒙古气旋日数明显下降。此外,春季蒙古气旋出现的频数最高,冬季出现的频数最低。从80到90年代,春、夏、秋、冬四季蒙古气旋活动呈一致的波动减少趋势,其中春季变化与全年最为一致。蒙古气旋活动的年际差异也十分明显,蒙古气旋活动偏多年和偏少年对流层低层温度场距平分布存在明显差异,说明大气环流是影响气旋活动的一个重要因素。
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| 关 键 词： | 蒙古气旋 气候特征 频数变化 强度变化 温度距平 |
Study on Climatic Characteristics and Variation of Mongolia Cyclone |
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| WANG Xin-min,JIANG Zhi-hong,ZHAI Pan-mao,FAN Xue-feng,LU Tan.Study on Climatic Characteristics and Variation of Mongolia Cyclone[J].Meteorology Journal of Henan,2007(1). |
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| Authors: | WANG Xin-min JIANG Zhi-hong ZHAI Pan-mao FAN Xue-feng LU Tan |
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| Institution: | WANG Xin-min1,3,JIANG Zhi-hong1,ZHAI Pan-mao2,FAN Xue-feng3,LU Tan3 |
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| Abstract: | Based on sea level pressure(SLP) reanalysis data from ECMWF from 1979 to 2001,the study applied the improved method to objectively identify and track cyclones.Through analyzing the frequency and intensity of the cyclone over Mongolia,the paper found the Mongolia cyclonic activity had evident variability respectively in the seasonal,interannual and interdecadal time scales.From 1979 to 2001,the frequency of the cyclone was declining and its intensity was decreasing.Its activity reached strongest in the middle of 1980.The study also showed Mongolia cyclone appeared most frequently during spring season and least frequently during winter season.From 1980s to 1990s,the intensity of the cyclonic activities showed declining trend during all four seasons,especially in spring.Additionally,Mongolia cyclonic activity was also notable in the interannual variability.There was significant tropospheric temperature anomalous difference between its active years and its suppressed years,which hinted us the tropospheric atmospheric circulation was a key factor to influence the Mongolia cyclonic activity. |
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| Keywords: | Mongolia cyclone Climatic characteristics Frequency variability Intencity variability Temperature anomaly |
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