学会誌「EICA」

[特集] リモートセンシングによる地球規模大気のモニタリング

内容

地球規模大気のモニタリングシステム

巻

10巻1号2005年

Page

20

題名

リモートセンシングによる地球規模大気のモニタリング

Title

Monitoring the Global Atmosphere by Use of Remote Sensing Technique

著者

横田 達也

Authors

Tatsuya Yokota

著者表記

Author attribution

著者勤務先名

(独)国立環境研究所

Office name

National Institute for Environmental Studies

著者所属名

キーワード

Key Words

ozone depletion, global warming, ILAS, ILAS-II, GOSAT

概要

Abstract

Major issues to be monitored in the global atmosphere, with a satellite remote sensing technique, are the ozone depletion in the stratosphere and global warming monitoring in the troposphere. Two satellite sensors for ozone layer monitoring were developed in Japan. They are: (1) Improved Limb Atmospheric Spectrometer (ILAS) which operated from October 1996 to June 1997, and (2) Improved Limb Atmospheric Spectrometer-II (ILAS-II) operated from April 2003 to October 2003. Following important data were obtained by those sensors: The data on vertical profiles of several gases related to ozone depletion mechanism in polar ozone layers. Especially, we had an opportunity to observe a very large ozone hole over the Antarctica frequently with ILAS-II in 2003. The data products obtained by ILAS and ILAS-II have been used for several atmospheric scientific researches. As for the global warming, a Greenhouse gases Observing Satellite (GOSAT) project is now making progress in Japan. GOSAT is a joint project promoted by three organizations: The Ministry of the Environment (MOE), the National Institute for Environmental Studies (NIES), and the Japan Aerospace Exploration Agency (JAXA). A Fourier-Transform Spectrometer of GOSAT will execute the measurements of column densities of greenhouse gases such as carbon dioxide and methane precisely. GOSAT is planned to be launched in around 2008. The remote sensing technique tends to be sophisticated for obtaining the precise and useful information for researches on global environment issues.