华北地区高致病性禽流感与气象条件分析

Analysis on the Relationship between Highly Pathogenic Avian Influenza and Meteorological Conditions in North China

利用中国大陆高致病性禽流感疫情资料、NCEP/NCAR日平均再分析数据资料集以及华北地区气象站地面观测资料,研究了华北地区高致病性禽流感发生与气象条件的关系。结果表明,华北地区高致病性禽流感主要发生在秋冬季。发生前期,高致病性禽流感发生地区冷空气活动频繁,气温较低且波动明显,前期或同期高致病性禽流感发生地外界环境较为湿润。此外,合适的风向风速可能有利于烈性传染病高致病性禽流感向周边地区扩散和传播。

By using the epidemic situation data of highly pathogenic avian influenza（HPAI）in Chinese mainland,the daily NCEP/NCAR reanalysis datasets and the surface observation data in North China,the relationship between highly pathogenic avian influenza（HPAI）and meteorological conditions was investigated.The results showed that HPAI occurring in North China mainly occurred in autumn and winter.Before the outbreak of HPAI,the activities of cold air were frequently,the air temperature was lower than normal and fluctuated obviously.The outside environment was wetter before or after HPAI broke out.Additionally,appropriate surface wind might facilitate the dispersion and transmission of HPAI to the surrounding area.