ALADIN

Most recent articles

• Assimilation and analysis (current status)

  3 July 2009, by JFM
  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 (…)

• Modelling components (current status)

  3 July 2009, by JFM
  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 (…)

• Physiography (current status)

  3 July 2009, by JFM
  ComponentALADINCOSMOHIRLAMUM/JULESECMWF Orography GTOPO30 at 30’’ resolution GLOBE database NOAA/NGDC resolution 30’’ Global 1km data GTOPO30 GLOBE 30’’ GTOTPO30 Turbulent orography form drag Soil types FAO at 10 km resolution : fraction of sand and clay FAO Digital Soil Map of the World at resolution 10 km FAO soil database, reduced to 3 classes WHS (UKPP used IGBP) FAO data at 5’ by 5’ interpolated at the operational model resolution Soil depths ECOCLIMAP database at 1km resolution (…)

• Documents

  2 July 2009, by JFM
  Useful links and documents Workplan for 2008-2009Responses to the request from the SRNWP interoperability programme (02/07/2009) Summary of planned actions in 2008Review talk on surface issues (2008)Main programme of the 2008 EWGLAM-SRNWP meeting (including pdf presentations)Review talk on surface issues (2009)Main programme of the 2009 EWGLAM-SRNWP meeting (including pdf presentations)

• 2009 : Preparatory documents for Arpège/IFS coordination meetings

  17 June 2009, by Patricia
  OOPS meeting at ECMWF of November 18, 2009 OOPS: Object-Oriented Prediction System / Restructuring the IFS by Yannick Trémolet Do we need full object-oriented features? by Mike Fisher Practical lessons learned from implementing an Object-Oriented toy system by Deborah Salmond and Anne Fouilloux From IFS to OOPS" by Yannick Trémolet Afternoon Discussions (list of topics) by Yannick Trémolet Selected and personal slides by C. Fischer for a presentation of OOPS to MF and partners Meeting (…)

• Joint 19th ALADIN Workshop & HIRLAM ASM 2009, Utrecht, 12-15 May 2009

  15 May 2009, by Patricia
  The next joined ALADIN Workshop (19th) and HIRLAM All Staff Meeting (2009) will take place in Utrecht, the Netherlands on May 12-15, 2009. The meeting is scheduled to start on Tuesday morning 12 May around 9h, and end on Friday 15 May around noon. As was the case in previous years, there will be a largely common program, based on joint thematic sessions (hopefully fully plenary, this time). In addition, a meeting of the HIRLAM Management Group and the ALADIN CSSI will take place to discuss (…)

• Export version of Cycle 35T1, on December 17, 2008

  29 April 2009, by Patricia
  Cycle 35T1, export version number 1, updated on December 17, 2008 Archives (contains source code, input files, some namelists and a fix for pinuts) are located on cougar: marp001/pub/export/cy35t1. Tar files for the export version are also available at ECMWF on ECFS archive system in the directory rmn/export/exp_35t1 (contact Olivier Rivière in case of problem). export_CY35T1_main.tar.gz contains all sources from cycle CY35T1 (main) export_CY35T1_pinuts.01.tar.gz contains all sources (…)

• SURFEX training course, Toulouse, 14-16 Oct 2009

  27 April 2009, by Patricia
  A SURFEX training course was organized in Toulouse from 14 to 16 October 2009. Main topics are listed below : Introduction Present use of SURFEX in different applications ECOCLIMAP ISBA Ocean parametrisations Inland water, FLake TEB Surface boundary layer Chemistry and aerosol Surface assimilation 2 practical trainings were scheduled during this course : on physiography, databases and on running the offline version of surfex. Link to on-line presentations and practical exercices.

• Reports of ALADIN stay : 2009

  26 March 2009, by JAM
  – See also: El OUARAINI Rachida: Mise en place et Expérimentation d’une Initialisation des Perturbations des Ébauches de l’Assimilation d’Ensemble. SAHLAOUI Zahra: Radiance TERRE FERREIRA Joao: Improving the surface initialization of Aladin (ISBA) from IFS (HTessel) Analysis GIBIER F.: Validation des cartes de variance d’erreur d’ébauche issues d’une assimilation d’ensemble DZIEDZIC Adam: Tests of different moist simplified physics in Arpege/Aladin 4D-VAR Figures, Appendix 1,Appendix (…)

• 1st Meeting of the Expert Team on Surface Processes, Toulouse, 12 June 2009

  2 March 2009, by JFM, Patricia
  Objective of the meeting The 14th SRNWP meeting held in October 2007 (Dubrovnik, Croatia) proposed the creation of eight Expert Teams according to various aspects of short range numerical weather prediction in order to enhance collaborations between the five main European consortia. Regarding the ET on “surface processes†a draft workplan was written at the beginning of 2008 providing guidelines on possible collaborations over the coming years. This draft was presented and discussed (…)