ALADIN

4th Working day of the SRNWP Expert Team on Surface Processes, 21 September 2012, FMI, Helsinki (Finland)

JFM — 2012-09-25T21:30:32Z

The fourth meeting of the Expert Team on surface processes took place one day after the 3rd lake workshop that has been set-up and maintained by COSMO, on activities related to the improvement of the lake databases and climatologies, and on future common activities. We also discussed contributions to the next EWGLAM/SRNWP meetings (titles for the presentations and also a title for the review talk). Minutes of the meeting (written by Jean-FranÃ§ois Mahfouf) The presentations given during (…) - SRNWP Expert Team on surface processes

3rd Working day of the SRNWP Expert Team on Surface Processes, 5 September 2011, ECMWF, Reading (U.K.)

JFM — 2011-09-20T16:59:07Z

The third meeting of the Expert Team on surface processes took place one day before the ECMWF Annual Seminar and was kindly hosted at ECMWF thanks to Patricia de Rosnay and Gianpaolo Balsamo. Each consortium had at least one representative. This has allowed a rather comprehensive review of the activities among Europe. Discussions concerned the use of the COLOBOC/SRNWP Data pool that has been set-up and maintained by COSMO, on activities related to the improvement of the lake databases and (…) - SRNWP Expert Team on surface processes

2nd Meeting of the Expert Team on Surface Processes, ZÃ¼rich, 15 September 2010

JFM — 2010-09-29T17:16:36Z

A second meeting of the Expert Team on surface processes took place during the last EMS conference in ZÃ¼rich and was kindly hosted by Meteo Swiss, thanks to Jean-Marie Bettems. The first part was devoted to the description on the database of in-situ measurements for local validation of NWP land surface schemes. This activity which is part of the COLOBOC project of the COSMO consortium has been endorsed by SRNWP in order to make the data available to our community. The second part was (…) - SRNWP Expert Team on surface processes

SMOSREX forcing and validation data

JFM — 2009-08-18T09:57:55Z

Validation fluxes (surface energy balance) Forcing data (radiation, precipitation, meteorology) Simulated LAI (derived from ISBA A-gs) Deep soil moisture measurements (2005-2007) Superficial soil moisture measurements (2005-2007) Soil temperature measurements (2006) Soil temperature measurements (2007) Details about file contents Soil temperature files contain : Date (ddmmyyyy) Time (UTC) Julian day Soil temperature at -1 cm Soil temperature at -5 cm Soil temperature at -20 cm Soil (…) - SMOSREX data set

Modelling components (under development)

JFM — 2009-07-14T22:33:39Z

ComponentALADINCOSMOHIRLAMUM/JULESECMWF Surface energy balance Patch approach over the nature tile : (up to) 12 different energy and water budgets Flexible tile approach with separate energy budgets Multi Energy Balance in SURFEX/HARMONIE Flexible tile scheme with user defined tiles and elevation bands None Coupling with the atmosphere None None None None None Soil transfers Multi-layer soil scheme (ISBA-DIF) Account for heterogeneous soil properties and organic soils Multi-layer soil (…) - Documentation of SRNWP surface modelling and assimilation systems

Physiography (under development)

JFM — 2009-07-14T21:52:11Z

ComponentALADINCOSMOHIRLAMUM/JULESECMWF Orography GTOPO030 database resolution 30â€ None None None at present, possibly SRTM in future None Soil types FAO database resolution 10 km : fraction of sand and clay Harmonized World Soil Database (HWSD) None HWSD + STATGO + observations None Soil depths ECOCLIMAP database resolution 1km. Lookuptable with ecotypes HWSD None HWSD None Land covers ECOCLIMAP resolution 1km. 255 ecotypes derived from NDVI classification and a set of 12 pure (…) - Documentation of SRNWP surface modelling and assimilation systems

Assimilation and analysis (under development)

JFM — 2009-07-11T22:03:34Z

Model parametersALADINCOSMOHIRLAMUM/JULESECMWF Soil temperature and water content Extended Kalman Filter (EKF) for conventional and satellite observations. Offline mode First guess T2m and Q2m from open land/snow only (excluding forest) Addition of ASCAT data. Longer term plan is to develop an EKF scheme that uses screen observations and satellite data Extended Kalman Filter (EKF) for use of conventional (soil moisture and brightness temperatures). Offline mode Sea surface temperature (…) - Documentation of SRNWP surface modelling and assimilation systems

References and bibliography

JFM — 2009-07-03T12:52:07Z

ALADIN Best, M.J., A. Beljaars, J. Polcher, and P. Viterbo (2004) : A Proposed Structure for Coupling Tiled Surfaces with the Planetary Boundary Layer. J. Hydrometeor., 5, 1271â€“1278, 2004. Boone, A., J.-C. Calvet, and J. Noilhan (1999) : Inclusion of a third soi layer in a land surface scheme using the force-restor method. J. Appl. Meteor., 38, 1611-1630 Boone, A. (2000) : ModÃ©lisation des processus hydrologiques dans le schÃ©ma de surface ISBA : inclusion d'un rÃ©servoir hydrologique, (…) - Documentation of SRNWP surface modelling and assimilation systems

Assimilation and analysis (current status)

JFM — 2009-07-03T12:43:47Z

Model parameters ALADINCOSMOHIRLAM/HARMONIEUM/JULESECMWF Soil temperature and water content Optimum interpolation based on screen-level analysis increments of T and RH 2-dimensional (vertical and temporal) variational technique using 2-m temperature analyses at 12 and 15 UTC Analysed variables : soil moisture of the top 5 soil layers (0-81 cm) at 00 UTC Optimum interpolation based on screen-level analysis increments of T and RH Errors in forecasts of screen T and RH used to calculate (…) - Documentation of SRNWP surface modelling and assimilation systems

Modelling components (current status)

JFM — 2009-07-03T11:55:41Z

modelling component ALADIN COSMO HIRLAM UM/JULES ECMWF surface energy balance Tile approach with separate energy budgets (sea/inland water/nature). One single surface temperature for the "nature" tile (bare soil/vegetation/snow) Surface temperature is area weighted average of temperature of snow covered and snow free surface fraction A tiled scheme with 5 tiles : water (sea+lakes), sea-ice, bare soil, low vegetation and forest (HIRLAM) ; Tile approach with sea/inland (…) - Documentation of SRNWP surface modelling and assimilation systems