ECMWF and the European Union Project ELDAS (Development of a European Land Data Assimilation System to predict Floods and Droughts) jointly organized a Workshop on Land Surface Assimilation which took place from 8 to 11 November 2004 at ECMWF. This was the closing workshop for ELDAS.
Description
Land surface processes have a dramatic effect on near surface atmospheric variables such as temperature and specific humidity, affect continental scale temperature through a considerable part of the troposphere and interact strongly with precipitation. Data assimilation is necessary to constrain model drift, bringing the model state closer to observations. This is particularly important given the large sensitivity of model integrations to the initial conditions of surface variables, e.g., root zone soil water. Despite this, most Numerical Weather Prediction (NWP) centres use very simplified ways for initialising the land surface, ranging from nudging to climatology to optimal interpolation of proxy data.
Compared to atmospheric assimilation, land surface assimilation has received much less attention. The workshop will discuss current and future conventional and remote sensing data, and the critical issues related to data assimilation methods. Topics covered range from NWP issues to applications such as crop modelling and monthly-to-seasonal forecasts, as well as plans for assimilation of observations related to the surface branch of the global carbon cycle.
Programme
Working groups
Proceedings
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A simplified variational analysis scheme for soil moisture: Developments at Météo-France and MSC G Balsamo |
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Remote sensing of precipitation from space over land surfaces P Bauer |
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The use of soil moisture in hydrological forecasting V A Bell |
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Land-surface, boundary layer and cloud-field coupling over the Amazon in ERA-40 A K Betts |
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Assimilation of remote sensing data to monitor the terrestrial carbon cycle: the carbon observatory of geoland J-C Calvet |
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Ecoclimap 2: A new approach at global scale for ecosystems mapping and associated surface parameters database using SPOT/VEGETATION data J-L Champeaux |
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Continental-global scale validation and evaluation of land surface models P Dirmeyer |
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Snow analysis M Drusch |
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The ECMWF soil data assimilation J Ettema |
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Validation of ELDAS at catchment scale L P Graham |
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Validation of ELDAS products using in situ observations C Jacobs |
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Carbon and fAPAR assimilation within CCDAS W Knorr |
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The North American Land Data Assimilation System (NLDAS) K Mitchell |
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Significance of ELDAS soil moisture products for NWP J A Parodi |
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Land data assimilation and seasonal climate prediction R Reichle |
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NASA/NOAA's Global Land Data Assimilation System (GLDAS): Recent results and future plans M Rodell |
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Daily and 3-hourly quantitative precipitation estimation for ELDAS F Rubel |
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The use of remote sensing data to improve the modelling of skin temperature I F Trigo |
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Variational soil assimilation at DWD W Wergen |
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Weather induced uncertainty in the European Crop Growth Monitoring System A J W de Wit |
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ELDAS radiation and heating rates products using METEOSAT data B van den Hurk |
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