Assimilating All-Sky Himawari-8 Satellite Infrared Radiances: A Case of Typhoon Soudelor (2015)

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Honda, Takumi ; Miyoshi, Takemasa ; Lien, Guo-Yuan ; Nishizawa, Seiya ; Yoshida, Ryuji ; Adachi, Sachiho A. ; Terasaki, Koji ; Okamoto, Kozo ; Tomita, Hirofumi ; Bessho, Kotaro (2018)
  • Publisher: American Meteorological Society
  • Journal: Monthly Weather Review, volume 146, issue 1, pages 213-229 (issn: 0027-0644)

Japan’s new geostationary satellite Himawari-8, the first of a series of the third-generation geostationary meteorological satellites includingGOES-16, has been operational since July 2015. Himawari-8 produces highresolution observations with 16 frequency bands every 10 min for full disk, and every 2.5 min for local regions. This study aims to assimilate all-sky every-10-min infrared (IR) radiances from Himawari-8 with a regional numerical weather prediction model and to investigate its impact on real-world tropical cyclone (TC) analyses and forecasts for the first time. The results show that the assimilation of Himawari-8 IR radiances improves the analyzed TC structure in both inner-core and outer-rainband regions. The TC intensity forecasts are also improved due to Himawari-8 data because of the improved TC structure analysis.
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