1. Japan Meteorological Agency, June 2016 Coordination Group for Meteorological Satellites - CGMS JMA Testbed for Satellite-based Volcanic Ash Products Presented to CGMS-44 Working Group II session, JMA-WP-04, agenda item 8 Japan Meteorological Agency

2. Japan Meteorological Agency, June 2016 Coordination Group for Meteorological Satellites - CGMS Background Concept of JMA Testbed MTSAT/Himawari-8 Volcanic Ash Products Himawari-8 Near-Real-Time Testbed System WGII/8 A41.26: JMA to establish an environment to implement multiple algorithms to retrieve quantitative ash cloud parameters from operational satellites. This will serve as a test bed for the intercomparison of retrievals on an operational basis in the framework of SCOPE-Nowcasting. JMA is invited to perform an intercomparison based on historical data and report on this to CGMS-42. HLPP #3.2.2: Establish a coherent development of volcanic ash products (notably from current and future geostationary imagers) utilising the JMA testbed. This WP is prepared in response to: Contents

3. Japan Meteorological Agency, June 2016 Coordination Group for Meteorological Satellites - CGMS Background – Satellite-based Volcanic Ash and its Inter-comparison System Retrieval algorithms: developed by satellite-operating agencies Products: provided to Volcanic Ash Advisory Centers (VAACs) for their operation –Consistency among satellite-based products and aircraft observation: major consideration in aviation safety CGMS-41: JMA agreed to establish testbed for inter-comparison Collaboration w/ EUMETSAT and NOAA/NESDIS CGMS-42: MTSAT-2 Preliminary results Now: Needs for Himawari-8 testbed on near-real-time basis CGMS-42 JMA-WP-07

4. Japan Meteorological Agency, June 2016 Coordination Group for Meteorological Satellites - CGMS Concept of JMA Testbed Multiple volcanic ash retrieval algorithms can be implemented and compared systematically –JMA+EUMETSAT and NOAA/NESDIS algorithm –Common satellite observation + ancillary data input (e.g. NWP and SST) for various algorithms –Users can compare performance inherent in each algorithm Comparison results are expected: –To contribute to Improvement of volcanic ash products –To be used to eliminate inconsistencies among the products

5. Japan Meteorological Agency, June 2016 Coordination Group for Meteorological Satellites - CGMS Concept of JMA Testbed MSC OMP NPD Other Software (Algorithm A) Software (Algorithm B) Software (Algorithm C) Compile Source Code Test-bed Web Site Input Dataset Processing Visualization JMA Binary Source Code FTP-put Algorithm AAlgorithm BAlgorithm C Output (Algorithm A) Output (Algorithm B) Output (Algorithm C) Compile Visualization AODEPR MLDHGT Figures (Algorithm A) AODEPR MLDHGT AODEPR MLDHGT Figures (Algorithm B) Figures (Algorithm C) SAT Image (HSF, HRIT) MGDSST (Binary) NWP data (GRIB2) Algorithm Developer

6. Japan Meteorological Agency, June 2016 Coordination Group for Meteorological Satellites - CGMS Himawari-8 Volcanic Ash Products A) Based on EUMETSAT algorithm LUTs provided by EUMETSAT –Output: AOD, effective radius, mass loading Ash cloud detection algorithm (combination of Bayesian method and grouping technique) for ash probability computation was developed at JMA/MSC H 2 O intercept method is additionally used for ash top height assignment Input ancillary data: –NWP from JMA global NWP model (GSM) –JMA's Merged satellite and in-situ data Global Daily Sea Surface Temperature (MGDSST)

7. Japan Meteorological Agency, June 2016 Coordination Group for Meteorological Satellites - CGMS Himawari-8 Volcanic Ash Products B) NOAA/NESDIS algorithm Volcanic Cloud Analysis Toolkit (VOLCAT) is implemented –Output: cloud top height, AOD, effective radius, mass loading, probability Input ancillary data: –NWP from JMA global NWP model (GSM) –NOAA's Optimum Interpolation Sea Surface Temperature (OISST)  Will be replaced with JMA's MGDSST in the near future

8. Japan Meteorological Agency, June 2016 Coordination Group for Meteorological Satellites - CGMS Himawari-8 Near-Real-Time Testbed System JMA Testbed: started operation at the end of March 2016 –Monitoring website: launched in May 2016 http://www.data.jma.go.jp/mscweb/en/va_testbed/index.html

9. Japan Meteorological Agency, June 2016 Coordination Group for Meteorological Satellites - CGMS Near-Real-Time Testbed System Retrieval results for the last 3 days are currently stored a 2-D distribution maps and histograms –Ash top height –AOD –Effective particle radius –Mass loading –Ash probability Satellite imageries –Ash RGB –Split window image –True color image Historical data: will be prepared in the near future

10. Japan Meteorological Agency, June 2016 Coordination Group for Meteorological Satellites - CGMS Near-Real-Time Testbed System – Supported areas to be displayed Himawari-8 full-disk Tokyo VAAC Area of Responsibility Kamchatka Peninsula (Russia) Kyushu Island (Japan)

11. Japan Meteorological Agency, June 2016 Coordination Group for Meteorological Satellites - CGMS JMA/MSC established a testbed system in which multiple retrieval algorithms can be implemented and compared systematically The testbed can be used to run several programs of different algorithms with common satellite and ancillary data to enable comparison of performance inherent in each algorithm Via the monitoring system, JMA expects the testbed system to help improve satellite-based volcanic ash retrieval algorithms and reduce related inconsistencies among them. ACKNOWLEDGEMENT Thanks go to NOAA/NESDIS for their work on the development and provision of the VOLCAT software and to EUMETSAT for the provision of their algorithm and LUTs for volcanic ash retrieval. Summary

12. Japan Meteorological Agency, June 2016 Coordination Group for Meteorological Satellites - CGMS Thanks for your attention