轨迹聚类分析法研究青藏高原上空的大气输送  

Possible Regional Air Transport to the Tibetan Plateau Using Trajectory-Cluster Analysis

作　　者：安士健 郭淑政 陈熠 张田甜 林伟立 AN Shijian;GUO Shuzheng;CHEN Yi;ZHANG Tiantian;LIN Weili(College of Life and Environmental Sciences,Minzu University of China,Beijing 100081,China)

机构地区：[1]中央民族大学生命与环境科学学院,北京100081

出　　处：《中央民族大学学报（自然科学版）》2021年第1期35-40,共6页Journal of Minzu University of China(Natural Sciences Edition)

基　　金：国家自然科学基金(91744206);北京市科委项目(Z181100005418016)。

摘　　要：青藏高原海拔高、地形复杂,生态脆弱且对气候变化等敏感。由于远离工业化地区,大气环境十分清洁,但其恶劣的环境限制了科学研究的深入进行。本文利用HYSPLIT4轨迹模式及NCEP全球同化气象数据计算2001全年青藏高原6个不同地点上空的气团后向轨迹,结合聚类统计技术对轨迹特征进行分析。通过与高原气候特征及其季节变化特点进行比较,考察轨迹聚类分析方法应用于研究青藏高原大气输送的可行性。从总体上说,大气轨迹聚类统计的结果与高原上不同季节天气系统的变化和在空间上的差异是相互印证的。利用以上方法获得了青藏高原上空大气输送途径的季节变化和在空间上的差异。The Tibetan plateau is high in altitude and quite complex in terrain and the ecological system is vulnerable and very sensitive to climate change.The clean environment is normally considered as"undisturbed"attributed to its height and its distance from industrialized areas.But the hard-working conditions and the absence of observing data limited the scientific researches.Backward trajectories in a whole year over 6 different sites in the Tibetan plateau were calculated by HYSPLIT4 model with meteorological data from NCEP model output,and then were clustered.The reliability of applying this trajectory-cluster-analysis to the Tibetan plateau was considered by comparison with the climatology and its seasonal changes in the Tibetan plateau.Generally,the results of cluster statistics in airmass trajectories were consistent with the changes and spatial differences of the weather systems in different seasons over the plateau.The possible atmospheric transport to the plateau as well as its seasonal changes and spatial variations were analyzed.The method was expected to establish relationships between the pollution sources around the plateau and the influence on the plateau.

关 键 词：青藏高原 后向轨迹 聚类分析 大气输送 

分 类 号：P401[天文地球—大气物理学与大气环境]