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衛星搭載アクティブセンサによる雲研究の現状と今後の展開
岡本, 創
Permalink : http://hdl.handle.net/2115/55060
Abstract
衛星に搭載された94GHz雲レーダとライダを用いて, 雲の巨視的構造や微物理特性を解析する複数の手法を開発してきた.その最新の知見とそこで得られた結果について議論する. 94GHzの雲レーダを搭載するCloudSat衛星と可視・近赤外の２波長偏光ライダを搭載したCALIPSO衛星のデータを利用して, これまで雲の検出を目的とした雲マスク, 雲の相や氷粒子の配向状態, そして雲の微物理特性に関するプロダクトを作成・提供してきた. 氷粒子モデルに起因するライダ後方散乱特性と抽出される雲微物理量の不確定性について述べ, 最後に日欧共同ミッションであるEarthCARE衛星で達成できる新しいサイエンスを紹介する.
We describe recent progresses in the development of series of algorithms to analyze 94GHz cloud radar of CloudSat and lidar of CALIPSO satellites. We introduce our findings from the analysis of these sensors and also discuss how to overcome the current problems and future direction. We develop cloud mask-, cloud particle type and cloud microphysics-algorithms that use the CloudSat and CALIPSO data and the products from those algorithms have been have been generated and distributed. We examine the relation between details of ice particle models and lidar backscattering properties and discuss about the uncertainties in the retrieved microphysics. Finally new observables and possible impact by the Japan-Europe EarthCARE mission are discussed.
We describe recent progresses in the development of series of algorithms to analyze 94GHz cloud radar of CloudSat and lidar of CALIPSO satellites. We introduce our findings from the analysis of these sensors and also discuss how to overcome the current problems and future direction. We develop cloud mask-, cloud particle type and cloud microphysics-algorithms that use the CloudSat and CALIPSO data and the products from those algorithms have been have been generated and distributed. We examine the relation between details of ice particle models and lidar backscattering properties and discuss about the uncertainties in the retrieved microphysics. Finally new observables and possible impact by the Japan-Europe EarthCARE mission are discussed.
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