IPWG’s Update to the CEOS Precipitation Constellation (PC) International Precipitation

1. IPWG’s Update to the CEOS Precipitation Constellation (PC) International Precipitation Working Group Ralph Ferraro NOAA/NESDIS College Park, MD USA Chris Kidd The University of Birmingham Birmingham, United Kingdom Presented by Phil Arkin CICS/Univ. of Maryland, College Park, MD USA CEOS Precipitation Constellation Workshop - Tokyo, Japan

2. Outline • Past year accomplishments • Membership • Specialty workshops • IPWG#4 status • IPWG ‘tools’ • IPWG activities that can support CEOS PC • Summary CEOS Precipitation Constellation Workshop - Tokyo, Japan

3. Recent Accomplishments • “Measuring Precipitation from Space” published in 2007 (Levizzani and Turk, editors) • Maintain and update web page (Levizzani) • Membership update, promotion, and expansion • Specialty meetings • PEHRPP • IWSSM • Presentations at scientific forums • AMS/Eumetsat Satellite Conference • EGU • AMS Annual Meeting • Seminars at academic institutions • Preparation for IPWG-4 CEOS Precipitation Constellation Workshop - Tokyo, Japan

4. IPWG Membership Update • Anyone can participate! • Original focus was operational agencies… • Most recent workshop, about 50% research community • Nearly 30 nations are involved! • North America – USA, Canada, Mexico • Central America – Costa Rica • Europe – Finland, France, Germany, Greece, Italy, Poland, Spain, Sweden, U.K. • Asia – China, Japan, S. Korea, Taiwan • South America – Argentina, Brazil, Peru • Africa – S. Africa • Australia • Interest recently received from – Egypt, India, Nepal, Mozambique, Russia, Turkey CEOS Precipitation Constellation Workshop - Tokyo, Japan

5. IPWG Specialty Workshops • These are held based on recommendations from the bi-annual IPWG workshops • Program for the Evaluation of High Resolution Precipitation Products (PEHRPP) • December 2007, Geneva, Switzerland • International Workshop on Space-based Snowfall Measurement (IWSSM) • 1st – October 2005, Madison, WI • 2nd – April 2008, Steamboat Springs, CO CEOS Precipitation Constellation Workshop - Tokyo, Japan

6. 1st Workshop on the Program for the Evaluation of High Resolution Precipitation Products (PEHRPP) • 3-5 December 2007, WMO, Geneva • 40 attendees from 12 countries • Presentations and working group reports on • applications, validation and error metrics CEOS Precipitation Constellation Workshop - Tokyo, Japan

7. 1st PEHRPP Workshop • Recommendations to the International Precipitation Working Group (IPWG) included: • Establish an Evaluation Science Team • Conduct a formal inter-comparison HRPPs through the IPWG • Establish an error metrics working group • Encourage HRPP developers to further develop error metrics • Workshop report submitted to Bulletin of the American Meteorological Society CEOS Precipitation Constellation Workshop - Tokyo, Japan

8. 2nd International Workshop on Space-based Snowfall Measurement (IWSSM) • Hosted by DRI Storm Peak Lab in Steamboat Springs, CO, April 1-4, 2008 • Approximately 50 scientists from 8 nations in attendance • Revisit status of the remote sensing and modeling of snowfall since 1st workshop (10/05) • Topical areas – Global estimation, Applications, New technology, Modeling (RTM and CRM), and Validation • Unique format for WG’s • Several good recommendations generated • Outcome to be documented in BAMS, EOS, etc. CEOS Precipitation Constellation Workshop - Tokyo, Japan

9. Bi-Annual IPWG Workshops • IPWG-1: September 2002, INM, Madrid, Spain • IPWG-2: October 2004, NRL, Monterey, US • IPWG-3: October 2006, Bureau of Meteorology, Australia • IPWG-4: October 2008 (National Satellite Meteorological Center, Beijing, China) • Program being developed • More time being considered for WG’s than previous workshops • 2nd Circular anticipated in June CEOS Precipitation Constellation Workshop - Tokyo, Japan

10. CEOS Precipitation Constellation Workshop - Tokyo, Japan

11. IPWG Developed Tools • Satellite algorithms • Inventory • “Simple” Software packages • IR based • MW based • Radiative Transfer model • Validation • Software Package • 24-hr regional verification • Useful links and information CEOS Precipitation Constellation Workshop - Tokyo, Japan

12. IPWG’s Potential Role in CEOS PC (1/2) Facilitate activities related to CEOS PC that have gained broader IPWG support • Standardization of MW radiometer calibration and inter-calibration measurements • Community radiative transfer models • Community cloud resolving model data sets • Common retrieval algorithms • Common validation methodologies and data sets • Promote necessary actions required from space agencies via CGMS to improve satellite precipitation retrievals • L0 sensor information and history • Free and open data exchanges • Future mission plans; can we help with precipitation requirements? CEOS Precipitation Constellation Workshop - Tokyo, Japan

13. IPWG’s Potential Role in CEOS PC (2/2) • Provide “cordial” forum to improve precipitation retrievals, their validation and applications • Algorithm intercomparisons (e.g., PEHRPP) • Standard validation template, expansion of routinely available data, and open participation to algorithm providers • Promote application needs and applications • Participation with JCSDA • Develop training for and encourage new advances for current and emerging space agencies • IPWG web page for algorithms, data set information, etc. • Sponsor workshops (as per IPWG recommendations) and training activities (at bi-annual IPWG) • Participate at as many relevant meetings • Encourage broader international participation • Define logical linkages between IPWG and CEOS CEOS Precipitation Constellation Workshop - Tokyo, Japan

14. Summary • The IPWG strongly endorses the activities of the CEOS PC and concur with philosophy as expressed in: • CEOS Precipitation Constellation (PC) 2008 Work Plan • CEOS PC 10-year Implementation Plan • IPWG can help out in many areas to further enhance the success of the PC CEOS Precipitation Constellation Workshop - Tokyo, Japan