A Rising Expectation for ISCCP to produce Long-Term Climate Data Records on Satellite Cloud Climatology over 30 years prepared by Toshiyuki KURINO, JMA for the 17 th Session of GSICS Executive Panel Biot, France, 2-3 June, 2016

ISCCP was established in 1982 as part of WCRP to collect and analyze satellite radiance measurements to infer the global distribution of clouds, their properties, and their diurnal, seasonal, and interannual variations. ISCCP since 1982 to produce Satellite Climate Data Records

GSICS is supporting SCOPE-CM in many ways The relationship between ISCCP and GSICS has not developed as successfully as it was expected initially. However, there may be new opportunities, possibly through SCOPE-CM info.org/index_.php/cgms/page?cat=initiati ves&page=scope-cm

Important Accomplishment “Intercomparison of Independent Calibration Techniques Applied to the Visible Channel of the ISCCP B1 Data” Anand K. Inamdar and Kenneth R. Knapp, June 2015 Produced based on ISCCP B1 data; - ISCCP B1 dataset were recently “rescued” at the NOAA/NCDC Specification of B1 data -from geostationary meteorological satellite imagery -global 3-hourly covering period from 1979 to present at 10-km spatial resolution -IR window, visible, and IR water vapor sensors

Independent assessment of the calibration of the visible band; -by cross-calibrating with AVHRR reflectance data from PATMOS-x dataset -the mean difference with ISCCP calibration is less than 3% (with the random errors under 2%) Important Accomplishment (cont.)

A Possible Contribution of GSICS for SCOPE-CM/ISCCP (1/3) Reprocessing ISCCP AC/B1 Dataset -Satellite operators are encouraged to apply GSICS approach to the ISCCP archived AC data by re- calibrating with NOAA/AVHRR or HIRS data as a reference with satellite house-keeping information (e.g. satellite zenith angle or instrument anomalies) for the future reprocessing of ISCCP cloud climatology based on ISCCP B1 dataset.

A Possible Contribution of GSICS for SCOPE-CM/ISCCP (2/3) -Reprocessing will be produced for two channels; one IR window and one visible channel over an entire period over 30 years after 1982 for producing climate normal. -After merging into global dataset, validation will be produced with a consistent correlation with other climate monitoring and diagnostics physical parameters through deviation analysis with climate normal.

A Possible Contribution of GSICS for SCOPE-CM/ISCCP (3/3) A possible re-calibration techniques proposed by GSICS in corporation with ISCCP GEO-LEO VIS Inter-Calibration using Deep Convective Clouds (DCCs) -using DCCs as Pseudo Invariant Targets GEO-LEO IR Direct Inter-Calibration -with NOAA/AVHRR and HIRS before the operation of MODIS Application to the vicarious calibration algorithm - Inter-Calibration with outputs from Numerical Weather Prediction (NWP) model reanalysis (e.g. ERA-Interim)

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