期刊论文

FY 2E Convective Cloud Detection Method based on Multi-thresholds

中文

遥感技术与应用

Remote Sensing Technology and Application

1004-0323

2014

29

6

915-922

10.11873/j.issn.1004-0323.2014.6.0915

国家自然科学基金项目(41275030； 41105098； 40905019)； 公益性行业(气象)科研专项(GYHY201306040)； 山西省气象局开放课题(SXKKFY20100101)；

本校为第一机构

介绍一种基于多个阈值的FY2E对流云识别方法。首先利用不同的阈值对2010年6~7月的FY2E云图进行识别,并统计识别出云团数量、尺度信息以及形状。根据统计结果,确定选择3个不同级别的亮温阈值,并以此逐步识别出对流云。最后根据识别出来的对流云的尺度、形状和云顶最低亮温,将对流云划分为18个类别。从应用结果来看,该方法不仅能够有效地识别从梅雨锋、台风等大尺度云系中的对流系统,而且还能在大范围的片状云系中检测出中小尺度的对流系统。

A method of convective cloud detection based on multi-thresholds is introduced.First of all,convective clouds are detected by single threshold method with different thresholds.And then the cloud numbers,scale information(length of long axis)and shape factor(eccentricity)are calculated based on the FY2 Ecloud imagery form June to July 2010.With thees statistic results,three bright temperature thresholds for three steps of convective cloud detection are selected.Finally,the convective clouds,which have been detected by three thresholds,are classified into 18 kinds by cloud factors;those are the ...