GEWEX Radiation Panel

Radiation Projects

GEWEX
PANEL

Terms of
Reference

Available
Products

Web Site /
Publications

GEWEX Radiation
Panel
(GRP)

Chair:
Christian Kummerow
2008 - Present

Vice-Chair:
Joerg Schulz

Guide GEWEX radiation projects in determining global water and energy fluxes in the atmosphere and at the surface, as an element of seasonal-to-interannual climate variability, and the response of the climate systems on decadal-to-interannual time scales to changes in anthropogenic forcing.

ISCCP,SRB, GACP,
GPCP, SeaFlux

Assessment and
Additional Working
Group Activities

See Listings below
Under GRP Projects

http://rain.atmos.colostate.
edu/GRP/index.html

Report on GRP activities in 2008

GRP
Projects

Terms of
Reference

Available
Products

Project Web Site /
Members /
Publications

Baseline Surface Radiation Network

Chair:
Ellsworth Dutton
1995 - Present

Provide highly accurate worldwide radiative flux measurements to validate satellite-based measurements. Develop instrument requirements, establish BSRN reference stations worldwide and assemble a database.

http://www.bsrn.awi.de/en/
data/dataretrieval_via_
pangaea/

http://gewex.org/bsrn.html

Station, Project
and Staff Directory

http://www.bsrn.awi.de/en/
other/publications/

Continuous Intercomparison of Radiation Codes

Chair:
Lazaros Oreopoulos
2004 - Present

Release a web site that will provide both synthetic and observation-based tests for any radiative transfer code calculating broadband fluxes (like those used in GCMs).

http://circ.gsfc.nasa.gov

Global Aerosol Climatology Project

Chair:
Michael Mishchenko
1998 - Present

Produce a 20-year climatology of aerosol forcing data from satellite observations and field observations for use in climate models.

http://gacp.giss.nasa.
gov/data_sets/

http://gacp.giss.nasa.gov/

http://gacp.giss.nasa.gov/
publications/

-

Global Precipitation Climatology Project

Chair:
Robert Adler
2005 - Present

Produce on-going, long-term, globally complete gridded estimates of precipitation. Merge precipitation estimates computed from satellite-based microwave, infrared, and sounding data with analyses of in-situ gauge data. Monthly, pentad and daily data sets are available for time period of 1979-present.

World Data Center for
Meteorology, Asheville

Global Precipitation
Analysis (NASA/GSFC)

Surface Reference
Data Center

http://www.gewex.org/gpcp.html

ftp://precip.gsfc.nasa.gov/pub/
gpcp-v2/doc/gpcp_citation_list.pdf

Assessment of
Global
Precipitation
Products
(May 2008)

Intercomparison of 3-D Radiation Codes

Chair:
Robert Cahalan
1997 - Present

Compare the performance of these 3D RT codes used in a variety of current scientific work in the atmospheric sciences.

http://i3rc.gsfc.nasa.
gov /i3rcresultstable.
htm

http://i3rc.gsfc.nasa.gov/

http://i3rc.gsfc.nasa.gov/
Working_groups.html

http://i3rc.gsfc.nasa.gov/
references.html

Radiation transfer Model Intercomparison

Chair:
Jean-Luc Widlowski
2005 - present

Systematic comparison of canopy radiative transfer models under controlled experimental conditions, generation of reference solutions for shortwave radiative quantities in 1D and 3D vegetation > canopies.

RAMI On-line
Model Checker

http://rami-benchmark.jrc.ec.europa.eu/

International Satellite Cloud Climatology Project

Chair:
William Rossow
1998 - Present

Produce a continuous global data set of the Earth's radiance using cloud radiance data from geostationary and polar orbiting weather satellites.

http://isccp.giss.nasa.gov/

ISCCP celebrated its 25th Anniversary in
July 2008.

For more information,
click here

http://isccp.giss.nasa.gov/

http://isccp.giss.nasa.gov/
partcenters.html

http://isccp.giss.nasa.gov/
research.html

Chair:
William Rossow
2006 - Present

Produce a high-resolution satellite-based data set of land-surface turbulent fluxes of heat and water.

http://wgdma.giss.nasa.
gov/gewexdsets.html

http://wgdma.giss.nasa.gov/
landflux.html

Chair:
Carol Anne Clayson
2006 - Present

Produce a high-resolution satellite-based data set of of surface turbulent fluxes over the global oceans.

http://seaflux.gfdi.fsu.edu/

Surface Radiation
Budget Project

Chair:
Paul Stackhouse
1997 - Present

Produce a 10-year global data set of the Earth's radiation budget (shortwave and longwave) using ISCCP data and radiative transfer models.

http://gewex-srb.larc.nasa.
gov/common/php/SRB_
data_products.php

http://gewex-srb.larc.nasa.gov/

http://gewex-srb.larc.nasa.gov/common
/php/SRB_publications.php

GRP
Working
Groups

Terms of
Reference

Available
Products

Project Web Site /
Members /
Publications

WGDMA
Working Group on
Data Management
and Analysis

Chair:
William Rossow
2002 - Present

Conduct systematic assessments of the current GRP products; refine and improve the analyses with particular attention to making the long-term record more homogeneous and making the products physically consistent; and conduct a complete re-processing of all the GEWEX data products.

http://wgdma.giss.nasa.gov/
gewexdsets.html

http://wgdma.giss.nasa.gov/
index.html

http://wgdma.giss.nasa.gov/
members.html

http://wgdma.giss.nasa.gov/
reports.html

GRP
Assessment
Working
Groups

Terms of
Reference

Available
Products

Project Web Site /
Members /
Publications

Cloud Assessment

Co-chairs:
Claudia Stubenrauch
2006 - Present
and
Stefan Kinne
2008 - Present

Assessing the reliability of the global, long-term cloud data sets.

http://climserv.ipsl.
polytechnique
.fr/gewexca/data-sets.html

http://climserv.ipsl.polytechnique.
fr/gewexca/presentation.html

http://climserv.ipsl.polytechnique
.fr/gewexca/participants.html

http://climserv.ipsl.polytechnique.
fr/gewexca/documents/index.html

Aerosol Product Assessment

Co-chairs:
Sundar Christopher
2008 - Present
and
Jeffrey Reid
2008 - Present

Assess the quality and compatibility of global aerosol products with a focus on the Global Aerosol Climatology Project (GACP)

http://www.atmos.umd.edu/~zli/
GAPA/gapa_main.htm

http://www.atmos.umd.edu/~zli/
GAPA/members.html

http://www.atmos.umd.edu/~zli/
GAPA/reports.html

Radiative Flux Assessment

Chair:
Paul Stackhouse
2004 - Present

Provide a forum for consistent analysis of long-term radiative flux products, primarily top-of-atmosphere and surface fluxes, to establish a foundation for better global radiation budget analysis.

http://eosweb.larc.nasa.
gov/GEWEX-RFA/

http://gewex-rfa.larc.nasa.gov/

http://gewex-rfa.larc.nasa.
gov/contacts/

Precipitation Assessment
(COMPLETED)

Co-chairs:
Arnold Gruber
and
Vincenzo Levizzani

Evaluate the reliability of available, global, long-term precipitation data products in depicting the variations of precipitation at larger than weather scales with a special emphasis on the GPCP product.

This Assessment has
been completed and
the report published
by WCRP in May 2008.

Assessment
of Global
Precipitation
(May 2008)

http://cics.umd.edu/~yin/GPCP//
ASSESSMENT/assessment.html