Atomosphere boundary layer height determination and observation from ceilometer measurements over Hefei during the total solar on July 22,2009 eclipse  

作　　者：何俊峰 刘文清 张玉钧 阚瑞峰 陈臻懿 阮俊 

机构地区：[1]Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences [2]Artillery Academy

出　　处：《Chinese Optics Letters》2010年第5期439-442,共4页中国光学快报（英文版）

基　　金：supported by the New Technology Research Foundation of the Chinese Meteorological Bureau under Grant No.GYHY200706023.

摘　　要：Using an improved inflexion point method（IIPM）,we investigate atmosphere boundary layer（ABL） height evolution over Hefei during the total solar eclipse on July 22,2009.A lidar ceilometer is used in ground-based observations.Estimations of ABL heights before,during,and after the solar eclipse are analyzed using the IIPM.Results indicate that the IIPM,which is less sensitive to background noise,is more suitable in detecting ABL height and temporal evolution.Data demonstrate that the total solar eclipse resultes in a decrease in ABL height,indicating a suppression of turbulence activity,similar to that observed during the sunset hours.Changes in ABL height are associated with a slow change in temperature,indicating a significant weakening of penetrative convection and a time lag between ABL response and the reduction in solar radiation.Using an improved inflexion point method（IIPM）,we investigate atmosphere boundary layer（ABL） height evolution over Hefei during the total solar eclipse on July 22,2009.A lidar ceilometer is used in ground-based observations.Estimations of ABL heights before,during,and after the solar eclipse are analyzed using the IIPM.Results indicate that the IIPM,which is less sensitive to background noise,is more suitable in detecting ABL height and temporal evolution.Data demonstrate that the total solar eclipse resultes in a decrease in ABL height,indicating a suppression of turbulence activity,similar to that observed during the sunset hours.Changes in ABL height are associated with a slow change in temperature,indicating a significant weakening of penetrative convection and a time lag between ABL response and the reduction in solar radiation.

关 键 词：Meteorological instruments Optical radar SUN Troposphere 

分 类 号：P125.11[天文地球—天体测量] P404[天文地球—天文学]