地球同步卫星向日葵8号水汽频道推算高层大气运动向量

Abstract

本文使用日本地球同步卫星向日葵8号上所载7.0微米水汽频道推导大气运动向量，实验的结果显示：以连续两张间隔10分钟的水汽频道观测影像所推导的大气运动向量，与探空风场数据比对可以发现，当推导过程中设定比较严格的质量检定情形下，卫星推导的大气运动向量与探空风场差值的大小，与区域模式6小时预报风场与探空风场差值十分接近，这显示目前以向日葵8号卫星水汽频道所推导的大气运动向量，具有不错的准确性，有机会于未来将此风场数据放进数值预报数据同化系统中。 In this article the water vapor channel at 7.0 micron on geostationary satellite Himawari-8 has been used to derive atmospheric motion vectors. The atmospheric motion vectors were created by two consecutive water vapor channel images with time interval 10 minutes. In order to estimate the errors of atmospheric motion vectors the atmospheric motion vectors were compare to sounding observation. It can be found that the errors of atmospheric motion vectors are close to the errors of 6 hours numerical weather forecast wind field where a strict quality check was adopted in deriving atmospheric motion vector procedure. These results reveal that the atmospheric motion vectors were accurate and have the potential to be used in data assimilation system in the future.