| A Monthly Atmospheric Circulation Classification and Its Relationship with Climate in Harbin |
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| 作者姓名： | JIA Liwei LI Weijing CHEN Deliang AN Xiaocun |
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| 作者单位： | Chinese Academy of Meteorological Sciences，National Climate Center，National Climate Center，Harbin Meteorological Bureau Beijing 100081，China National Climate Center，Beijing 100081，China，Beijing 100081，China，Beijing 100081，China Department of Earth Sciences Gothenburg University，Gothenburg 40530，Sweden，Harbin 150080，China |
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| 基金项目： | Supported by the National Natural Science Fundation of China under Grant No.40375025 and Programme of the Ministry of Science and Technology (2001BA611B-01). |
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| 摘 要： | In this study,the classification scheme developed by Jenkinson and Collison (1977) based on a typing scheme of Lamb (1950) is applied to obtain circulation types from the mean sea-level pressure on a monthly basis.Monthly mean sea-level pressure data from 1951 to 2002 are used to derive six circulation indices and to provide a circulation catalogue with 27 circulation types.Five major types (N,NW,C,CSW,and SW) which occurred most frequently are analyzed to reveal their relationships with the temperature of Harbin on various time scales.Stepwise multiple regression is used to reconstruct temperature anomaly.The monthly mean rainfall of all types occurring and the composite maps of three major types (C,CSW,and SW) relevant to Harbin's precipitation are studied. The results show that the dominant types in winter are types N and NW.types C,CSW,and SW occur frequently in summer.Types N and NW favor a negative temperature anomaly and correspond to less rainfall,while types C,CSW,and SW often induce a positive temperature anomaly and correspond to more rainfall.Moreover,a successful statistical model can be established with only one of the six indices and large-scale mean temperature.Using the model,77.3% of the total variance in the temperature anomaly between 1951 and 2002 can be reconstructed.Type C has a close relationship with total rainfall and type C precipitation plays a major role in determining the total rainfall of Harbin in recent years.This classification scheme is a statistical downscaling model and its relationships with temperature and precipitation can be used to forecast regional climate.
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| 关 键 词： | 月平均大气环流型 分型方法 温度 降水 哈尔滨 气候 |
| 收稿时间： | 2006/10/8 0:00:00 |
A Monthly Atmospheric Circulation Classification and Its Relationship with Climate in Harbin |
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| JIA Liwei,LI Weijing,CHEN Deliang,AN Xiaocun.A Monthly Atmospheric Circulation Classification and Its Relationship with Climate in Harbin[J].Acta Meteorologica Sinica,2006,20(4):402-412. |
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| Authors: | JIA Liwei LI Weijing CHEN Deliang AN Xiaocun |
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| Institution: | [1]Chinese Academy of Meteorological Sciences, Beijing 100081, China [2]National Climate Center, Beijing 100081, China [3]Department of Earth Sciences Gothenburg University, Gothenburg 40530, Sweden [4]Harbin Meteorological Bureau, Harbin 150080, China |
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| Abstract: | In this study,the classification scheme developed by Jenkinson and Collison (1977) based on a typing scheme of Lamb (1950) is applied to obtain circulation types from the mean sea-level pressure on a monthly basis.Monthly mean sea-level pressure data from 1951 to 2002 are used to derive six circulation indices and to provide a circulation catalogue with 27 circulation types.Five major types (N,NW,C,CSW,and SW) which occurred most frequently are analyzed to reveal their relationships with the temperature of Harbin on various time scales.Stepwise multiple regression is used to reconstruct temperature anomaly.The monthly mean rainfall of all types occurring and the composite maps of three major types (C,CSW,and SW) relevant to Harbin's precipitation are studied. The results show that the dominant types in winter are types N and NW.types C,CSW,and SW occur frequently in summer.Types N and NW favor a negative temperature anomaly and correspond to less rainfall,while types C,CSW,and SW often induce a positive temperature anomaly and correspond to more rainfall.Moreover,a successful statistical model can be established with only one of the six indices and large-scale mean temperature.Using the model,77.3% of the total variance in the temperature anomaly between 1951 and 2002 can be reconstructed.Type C has a close relationship with total rainfall and type C precipitation plays a major role in determining the total rainfall of Harbin in recent years.This classification scheme is a statistical downscaling model and its relationships with temperature and precipitation can be used to forecast regional climate. |
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| Keywords: | atmospheric circulation classification temperature precipitation statistical downscaling Harbin |
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