日本地球惑星科学連合2025年大会

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[E] 口頭発表

セッション記号 A (大気水圏科学) » A-AS 大気科学・気象学・大気環境

[A-AS07] EarthCAREによる雲エアロゾル放射科学の幕開け

2025年5月30日(金) 09:00 〜 10:30 展示場特設会場 (5) (幕張メッセ国際展示場 7・8ホール)

コンビーナ:久保田 拓志(宇宙航空研究開発機構 地球観測研究センター)、岡本 創(九州大学)、佐藤 正樹(東京大学大気海洋研究所)、高橋 暢宏(名古屋大学 宇宙地球環境研究所)、座長:佐藤 正樹(東京大学大気海洋研究所)、西澤 智明(国立環境研究所)


09:00 〜 09:15

[AAS07-01] Earth Cloud Aerosol and Radiation Explorer (EarthCARE) observation data are now available to the public

*久保田 拓志1、富田 英一2仁尾 友美3 (1.宇宙航空研究開発機構 地球観測研究センター、2.宇宙航空研究開発機構 EarthCARE/CPRプロジェクトチーム、3.宇宙航空研究開発機構 衛星利用運用センター)

キーワード:雲エアロゾル放射ミッション、雲、エアロゾル、放射

The Earth Cloud Aerosol and Radiation Explorer (EarthCARE) was launched at 7:20 AM (Japan time) on May 29, 2024. EarthCARE has four sensors with different observation methods: radar, lidar, imager, and radiometer.

The Cloud Profiling Radar (CPR) onboard the EarthCARE satellite is the world's first W-band (94 GHz) space Doppler radar, jointly developed by the Japan Aerospace Exploration Agency (JAXA) and the National Institute of Information and Communications Technology (NICT).

CPR conducted its first observations on 12th and 13th June 2024. The CPR observed the cloud region of a stationary front called the Baiu Front in the eastern sea of Japan, successfully measuring vertical motion of cloud from space for the first time in the world.
CPR has been monitoring since June 2024. On 4th October 2024, JAXA released the synergistic first image for clouds of Typhoon Shan Shan (2024) approaching the Japanese archipelago.

JAXA and NICT successfully completed the commissioning, the initial calibration and validation for the CPR. Operations have moved to the mission operation phase since January 2025.
ESA also announced the successful completion of the initial calibration and validation of the Atmospheric Lidar (ATLID), Multispectral Imager (MSI) and Broadband Radiometer (BBR).

Accordingly, Level 1 products of all sensors on the EarthCARE satellite have been released to the public since 14th January 2025.

Level 2 provides geophysical variables such as cloud mask, cloud phase, and cloud microphysics for each sensor product, as well as a synergistic product with a combination of sensors. In addition, CPR provides Doppler velocity observations. ATLID Level 2 includes aerosol information in addition to cloud information. Clouds and aerosol products from the CPR, the ATLID, and the MSI are used to derive shortwave and longwave radiation fluxes, which are checked for consistency with the BBR to produce a final radiation product with four sensors.

Level 2 single sensor and 2 sensor synergies will be available in March 2025, and 3-sensor and 4-sensor synergy products will be available around November to December 2025.

In addition, a wide range of applied research activities are planned to achieve the objectives of the EarthCARE mission. EarthCARE observational data can contribute to understanding cloud, aerosol and radiation processes, evaluating and improving climate and numerical weather forecast (NWP) models, and monitoring air quality.
This presentation will introduce the current status and early results of CPR and Japan's activities for the EarthCARE mission.