レーザーセンシング学会誌 (ISSN 2436-6239)
Journal of Laser Radar Society of Japan (ISSN 2436-6239)
Volume 3, Number 1 (April 2022)
解説: 研究船「みらい」における洋上水蒸気のライダー観測 pp. 13-26|
Technical Review: Observing moisture in the marine atmosphere using lidars on board the research vessel Mirai: A review
勝俣 昌己，谷口 京子，西澤 智明
Masaki Katsumata, Kyoko Taniguchi, and Tomoaki Nishizawa
The moisture in the marine lower troposphere is closely related to the weather and climate system. To measure it to resolve the meso-scale variation, we tried to utilize the lidar systems on board the research vessel Mirai. The first observation was made during the CINDY2011 field campaign in the Indian Ocean by adding the capability of retrieving Raman scattering at 660 nm onto a high-spectral resolution lidar. The obtained data successfully revealed the vertical transport of the moisture by cumulus quantitatively. The success was followed by the Raman lidar system based on the Mie-scattering onboard lidar. With the help of the dense radiosonde launches, the lidar(especially signals from 355-nm laser)successfully retrieved the moisture in the marine atmospheric boundary layer(MABL)with error comparable to the natural spatiotemporal variation. The case study demonstrated the capability to capture the meso-scale patches of moist / dry MABL. Possible future improvements are also discussed.