09:00 〜 09:15
[ACG36-01] GCOM-C「しきさい」で観測された2020年の地球環境
キーワード：GCOM-C、しきさい、SGLI、リモートセンシング
JAXA polar-orbit satellite, GCOM-C called “SHIKISAI” has been launched on 23 Dec. 2017, and continued global observation since 1st January 2018 with Second-generation Global Imager (SGLI). The key characteristics of SGLI are 250-m spatial resolution with 1150-1400 km swath and nineteen bands in 0.38-12 um including two polarimetry bands. The version 2 standard products have been released in the end of June 2020, the reprocessing of previous years data is on-going, and the next version 3 products will be open in the next winter.
In 2020, GCOM-C has captured several characteristic environment events: (1) heavy aerosols caused by wildfires in Australia, Siberia, California and Amazon, (2) weak unstable Kuroshio current, (3) upwelling of suspended sediment by typhoons in the East China Sea, (4) significant decrease of short wave radiation and (5) increase of coastal suspended sediment by long continued rain band around East Asia in July, and so on. The zonal mean of the SGLI near-ultraviolet channel was decreased corresponding to the aerosol events of (1). The SGLI 250-m resolution could reveal fine structure of the ocean surface current by comparing with Sentinel-3 OLCI images observed before 20-60 minutes. The upwelling of suspended sediment (3) could be analyzed with geophysical data by GCOM-W.
The accumulating data products are expected to be used in both researches and monitoring of the environmental change such as phenology and spectral characteristics, e.g., seasonal change of the land vegetation and the ocean phytoplankton, reflectance spectra of red tides, near-UV absorption of the aerosols, and so on.
In 2020, GCOM-C has captured several characteristic environment events: (1) heavy aerosols caused by wildfires in Australia, Siberia, California and Amazon, (2) weak unstable Kuroshio current, (3) upwelling of suspended sediment by typhoons in the East China Sea, (4) significant decrease of short wave radiation and (5) increase of coastal suspended sediment by long continued rain band around East Asia in July, and so on. The zonal mean of the SGLI near-ultraviolet channel was decreased corresponding to the aerosol events of (1). The SGLI 250-m resolution could reveal fine structure of the ocean surface current by comparing with Sentinel-3 OLCI images observed before 20-60 minutes. The upwelling of suspended sediment (3) could be analyzed with geophysical data by GCOM-W.
The accumulating data products are expected to be used in both researches and monitoring of the environmental change such as phenology and spectral characteristics, e.g., seasonal change of the land vegetation and the ocean phytoplankton, reflectance spectra of red tides, near-UV absorption of the aerosols, and so on.