摘要
利用2006～2007年高时空分辨率的NCEP-FNL大气再分析数据与气象观测数据，详细统计分析了中国近海大气波导的时空分布，给出了大气波导出现概率与其高度、厚度和强度等特征量的统计特征，并初步探讨了其成因。统计结果揭示：中国近海大气波导出现概率及波导类型的变化与东亚季风活动紧密关联，季风是其气候学成因；夏季时渤海、黄海、东海沿岸海域大气波导明显增多；台湾海峡与台湾东南毗邻海域常年是波导发生最频繁的海区。研究表明：借助中尺度大气数值模拟可以更细致地研究与预测中国近海大气波导的时空分布特征。
Based on the combined use of high-resolution NCEP-FNL reanalysis data and meteorological observations, spatial-temporal features of atmospheric ducts o- ver Chinese regional seas are statistically analyzed. Statistical information of occurrence probability, height, thickness and strength of the ducts are outlined in detail, and its generation mechanism is primarily discussed. The results are summarized as follows： first, there exists a close relationship between variance of appearance probability and type of the ducts and eastern Asia monsoon activity, second, coastal zones along the Bohai Sea, the Yellow Sea and the East China Sea have a distinct high occurrence probability during summer; and third, the maximal occurrence probability locates the Taiwan Strait and the sea area southeast to Taiwan Island. Further careful study on the ducts needs to employ powerful meso-scale atmospheric numerical modeling.
出处
《电波科学学报》
EI
CSCD
北大核心
2009年第4期702-708,共7页
Chinese Journal of Radio Science
基金
重点实验室基金(No.9140C0802050703)
国家自然科学基金(No.40706004与No.40675068)
973(No.61376与No.2005CB422301)
关键词
大气再分析数据
中国近海
大气波导
时空特征
统计分析
reanalysis data
China regional seas
atmospheric ducts
spatial-temporal features
statistical analysis
