IGOS-P Water Theme

The 8th GISP Meeting

10-11 November 2003

Khon Kaen, Thailand

Kenji Nakamura

Nagoya Univ. JAXA.

IGOS-P:

Integrated Global Observing Strategy - Partnership

Coordination of satellite and ground observation to meet wide scope data requirements

Themes: Ocean, Water Cycle, Carbon, Geohazard, Atmospheric Chemistry, Coastal …,

Partners: CEOS, WCRP, WMO, UNESCO, FAO, …

IGOS-P Water Cycle theme at Bethesda, MD, USA

January, 2003 on Precipitation

The 2nd WS at ESTEC on Applications at ESTEC, Netherlands for March 5-7, 2003

The 3rd WS at Awaji in Japan on March 14, 2003, before the 3rd WFF

IGOS-P Paris meeting on June 5, 2003

A session in the coming CEOS Plenary Meeting in US (November)

WMO, WCRP and CEOS would lead the implementation of IGOS-P water theme.

IGOS-P Water Cycle Theme

Foreword (D. Carson)

Table of Contents

Executive Summary

1. Motivation for the Water Cycle theme

2. The Scope of the Water Cycle Challenge

3. Applications for Water Cycle Data

4. Existing and Planned Systems for Priority Water Cycle Variables

5. Data Acquisition and Distribution

6. Towards Integration

7. Linkages

8. Institutional and Funding Issues

9. Implementation Structure and Timetable

10. Recommendations related to Implementation (Summary)

11. References

Appendices

(1) The water has a vast scope and strong relationship with human society. The water cycle variation to human society and ecosystem should be mentioned.(2) Anthropogenic impact is not only global like global warming, but also local and direct. For examples, the river control, irrigation and deforestation have direct effects on the water cycle.(3) Precipitation always has the highest priority. Following the precipitation, soil moisture, snow cover, and others are required.(4) Future specific mission, such as multi-satellite GPM should be described. Continuous records and consistent measurements are critical.(5) Complementary feature of space-based and ground-based measurements should be kept in mind. Ground validation sites include not only one site observation but basin scale sites. Current GPCC type mission should be supported. In addition, new efforts, such as, super site, super basin observation should be implemented.

(6) Data archiving/process/distribution is necessary for handling huge data.

(7) Processing and interpretation of huge data to information are essential. Much of end users would like to have concise information instead of huge data.

(8) Smooth transition of observations from research mode to operational mode is required.

(9) International activities should be implemented with recognition of various funding manners, since the funding varies from country to country.

(10) Data availability and access are important for full utilization of the observation data. So, they should be written.

(11) “Super site” type ground-based observation sites are required for full satellite utilization. CEOP is a good precursor under international cooperation.

(12) Capacity building is essential for the data utilization in developing countries, and should be written as part of strategy.

(13) Relationships with other activities, such as GEWEX may be listed as an annex.

GPM Reference ConceptGPM Reference Concept

Core Satellite•Dual Frequency Radar•Multi-frequency Radiometer•H2-A Launch•TRMM-like Spacecraft•Non-Sun Synchronous Orbit•~70° Inclination•~400 - 500 km Altitude•~4 km Horizontal Resolution•250 m Vertical Resolution

Constellation Satellites

•Small Satellites with Microwave Radiometers

•Aggregate Revisit Time,

3 Hour goal•Sun-Synchronous Polar Orbits

•~600 km Altitude

OBJECTIVE: Understand the Horizontal and Vertical Structure of Rainfall and Its Microphysical Element. Provide Training for Constellation Radiometers.

OBJECTIVE: Provide Enough Sampling to Reduce Uncertainty in Short-term Rainfall Accumulations. Extend Scientific and Societal Applications.

Global Precipitation Processing Center

•Capable of Producing Global Precip Data Products as Defined by GPM Partners

Precipitation Validation Sites

•Global Ground Based Rain Measurement

Design of the GPM Core Satellite and the DPR

KaPR

KaPR Additional radiation panel KuPR

(Spacecraft design by NASA/GSFC)

+x

KuPRKaPR

GMI

Basic design of KuPR and KaPR is the almost same as TRMM PR.

Wave-Wave-guide guide connectoconnectorsrs

Flight Direction

Core satellite launch: 2008?ESA showed strong interest in GPM. Decision to go forward (62) will be given

in March 2004.

GPM in Japan• GPM is ranked among future missions in the Roadmap of EO scenario for the

new space agency. • Phase B study from JFY 03 was approved by SAC (MEXT) on Nov. 27.

Though Ministry of Finance did not approve GPM study as phase B officially, budget and personnel requests were accepted as requested by MEXT. Not an established project, but “quasi-project” in EORC/JAXA.

• GPM science team was established in August 2003.• Preliminary evaluation has successfully passed in NASDA (JAXA) in the last

August. Next one will be in February/March 2004.• GCOM-B1: need feasibility study for less constellation satellite case.• Building up International framework is a matter of great urgency for us to

request next phase-up and budget by May/June time frame.– The 3rd GPM workshop was at ESTEC in June 2003.– GPM GV workshop is now in UK in November 2003.– Asia GPM workshop will be in February (2-4) in 2004.