GEWEX Modelling and Prediction Panel

The GEWEX Modelling and Prediction Panel (GMPP), which is chaired by Dr. Christian Jakob, oversees development and improvement of cloud and land-surface parameterization schemes of GMPP Projects to ensure their successful integration into global circulation models.

The Chair of GMPP also serves as the co-chair of the Working Group on Numerical Experimentation (WGNE), which is jointly sponsored by the World Climate Research Programme and the World Meteorological Organization Commission for Atmospheric Sciences (CAS). WGNE leads the development of atmospheric models for both climate studies and numerical weather prediction. The chair of GMPP is responsible for the parameterization effort within WGNE. In addition, the chairs of GCSS, GLASS and GABLS are members of WGNE.

GABLS	Description
GEWEX Atmospheric Boundary Layer Study (GABLS) Contact: Bert Holtslag and Gunilla Svensson GABLS Website	Coordinate research on boundary layer physics to improve the representation of the atmospheric boundary layer in models.

GCSS	Description
GEWEX Cloud System Study (GCSS) Contacts: Pier Siebesma and Christopher Bretherton GCSS Website	Develop new physically-based cloud parameterizations based on cloud resolving models of different cloud systems for numerical weather prediction and climate models. Develop models using existing and planned campaign data sets; conduct intercomparison workshops; and provide blueprints of cloud data requirements for new campaigns.
GCSS Projects:
DIME - Data Integration for Model Evaluation Contact: William Rossow DIME Website	An ad hoc activitity to provide test kits for model evaluation based on GCSS model intercomparison projects, including detailed results from the participating cloud resolving models.
ACPC - Joint GCSS/iLEAPS Aerosols, Clouds, Precipitation and Climate Project GCSS Contact: Bjorn Stevens iLEAPS Contact: Andreae Meinrat ACPC Website	Joint GCSS/iLEAPS activity to obtain a quantitative understanding of the interactions between the aerosol, clouds and precipitation, and their role in the climate system.
GCSS Working Groups:	Description:
Boundary Layer Clouds Contact: Adrian Lock Website	Improve physical parameterizations of clouds and cloud related processes and their interactions.
Cirrus Cloud Systems Contact: Steven Dobbie Website	Improve the parameterization of cirrus cloud systems.
Cloud Climate Feedbacks CGILS -- CFMIP-GCSS Intercomparison of LES and SCMs Contacts: Mingghua Zhang and Christopher Bretherton	Intercomparison of Large Eddy Models and Single Column Models that uses idealized large-scale dynamical conditions to evaluate subtropical marine boundary layer cloud feedback processes in GCMs.
Cloud Microphysics Contact: Ulrike Lohmann Website	Assess and evaluate variations in the microphysical schemes commonly used for different time scales and cloud regimes in process and large-scale models.
GPCI - GCSS Pacific Cross-section Intercomparison Contact: Joao Teixeira Website	Compare and evaluate the representation of clouds in climate and numerical weather prediction models, both global and regional, over the sub-tropical and tropical Pacific ocean.
Polar Clouds Contact: James Pinto and Hugh Morrison Website	Improve simulations of the long-lived mixed-phase clouds found at the top of the Arctic planetary boundary layer.
Precipitating Convective Cloud Systems Contact: Jon Petch Website	Improve the parametrization of precipitating convective cloud systems in global climate models and numerical weather prediction models through an improved physical understanding of cloud system processes.
GLASS	Description
Global Land/Atmosphere System Study (GLASS) Contact: Bart van den Hurk and Martin Best GLASS Website	Coordinate the development of improved land-surface schemes for coupled land-atmosphere models at all scales.
GLASS Projects:	Description:
ALMA - Assistance for Land-surface Modelling Activities Contact: Jan Polcher Website	Provide a data exchange format that is general and flexible enough to evolve with the needs of land-surface schemes.
GLACE-2 - Global Land-Atmosphere Coupling Experiment Contact: Randal Koster Website	The second phase of GLACE is aimed at quantifying, across a broad range of state-of-the-art forecast models, the subseasonal forecast skill associated with the initialization of land surface state variables. The design is based upon the successful pilot experiment (GLACE-1) and is built around a comprehensive suite of 60-day forecasts that are evaluated against observed precipitation and air temperature fields.
LoCo - Local coupled land-atmospheric Modelling Contact: Bart van den Hurk Website	Understand, model and predict the role of local land-atmosphere coupling in the evolution of land-atmosphere fluxes and state variables, including clouds.
LUCID - Land-Use and Climate, Identification of robust impacts Contact: Andrew Pitman Website	Joint GEWEX/GLASS and IGBP/iLEAPS Project to identify and quantify the impacts of land-used induced land-cover changes on the evolution of climate between the pre-industrial epoch and present-day.
PILPS - Project for the Intercomparison of Land-surface Parameterization Schemes Contact: Andrew Pitman Website	Contribute to improved understanding of continental surface and near-surface processes through international intercomparison of current state-of-the-art parameterization schemes employed in coupled climate, atmospheric and earth system models.
GSWP-2 - Global Soil Wetness Project Website This project concluded in 2006	GSWP-2 was an environmental modelling research activity.

Modelling and Prediction Projects