中国科学院 | 大气所 | 网站地图 | 加入收藏
首 页  | | | 论文论著 | | 科学传播 | English  
  新闻信息
最新消息
新闻搜索
最新消息 您当前所在的位置: 首页 > 新闻信息 > 最新消息
Dr. SHI Chong(JAXA/EORC)在我室报告
来源:LASG    访问次数:    更新时间:2018-2-11

Simultaneous determination of aerosol optical thickness and water leaving radiance from multispectral measurements in coastal waters

Dr. SHI Chong(石崇 )
日本宇宙航空研究开发机构地球观测研究中心(JAXA/EORC)

2018年2月11日(星期日)10:00
科研楼303会议室

报告会主持人:戴铁 副研究员

Abstract

Retrieval of aerosol optical thickness (AOT) and water leaving radiance over ocean is challenging since the latter mostly accounts for ~10% of the satellite observed signal and can be easily influenced by the atmospheric scattering. Such an effort would be more difficult in turbid waters due to the existence of optically complex oceanic substances or high aerosol loading. Standard atmospheric correction schemes, such as the ones implemented in the MODIS instrument, use near infrared or shortwave infrared bands to retrieve AOT based on the assumption of null water leaving radiance and then extrapolate to the shorter bands using the derived aerosol modes from look up tables. However, the retrieved aerosol spectral properties are not always fully consistent with the observations at shorter wavelengths as a result that the AOT values are sometimes reported to be overestimated and the derived water leaving radiance is occasionally negative in those bands. In this talk, I will introduce our recent work related to the development of a new algorithm for the simultaneous determination of AOT and water leaving radiance from multi-spectral measurements based on an optimal estimation approach; an oceanic radiative transfer model for open or turbid waters; an acceleration scheme for the radiative transfer model from Neutral Network method.

 
© 1997-2010 大气科学和地球流体力学数值模拟国家重点实验室 版权所有 京ICP备06004370号
北京9804信箱LASG 邮编:100029 传真:82995172