Diurnal land/atmosphere coupling experiment (DICE)

Photograph taken at the CASES-99 experiment
(Southern Great Plains, USA)

Updates

17th April 2015: announcement of the location of the submitted DICE datasets
13th Jan 2015: email update of DICE plans for 2015, including a joint workshop with GABLS4 in Toulouse 20 to 22 May 2015
1st August 2014: summary of break-out meeting at the GEWEX conference posted
16th April 2014 (updated with corrections 24th April): request for reruns of various stages, see email
20th December 2013: update of webpages with presentations linked to the October workshop page, including a summary of discussion and next steps, and a link to the CASES-99 surface obs (more to come)
29th August 2013: update of webpages with more information on the workshop (see timetable below) and details of stage 3 forcing . This includes a correction to the time variable in the LSM screen level forcing (to include zero in all files) and a second set of forcing files at a reference height of 20m. Also a request for LSMs to include surface momentum flux as an output diagnostic.
31st July 2013: email to group describing stage 3 forcing
3rd June 2013: creation of the DICE email list. See here for details of how to subscribe, etc
29th May 2013: clarification that the 2m and 10m near-surface diagnostics (T, q, winds) are not required for the uncoupled SCM simulations. In addition, heating tendency from radiation and massflux profiles added to the SCM diagnostics list
15th May 2013: correction to the time array in the SCM driver file, dice_driver.nc ("tsec" renamed "time" consistent with the documentation and shifted by 120s to start from zero)
3rd May 2013: correction to the time array in the 10 year spin-up file (shifted by 3 hours) and one additional element added - driver file corrected (DICE_LSM_spinup.nc)

Description

The following documents give all the details needed to contribute to DICE, a joint experiment between GLASS and GASS. Please email Martin Best and Adrian Lock if you intend to do so.

Document giving DICE description, timescales, etc
Stages 1 and 2
- Driver file for SCM (initial profiles, forcing, etc)
- Driver files for land surface models
  - 10 year spin-up: 3 hourly data (use linear interpolation for higher temporal resolution as required). Note that run should stop at 19UTC on the 23rd Oct 1999, but data is provided for 18UTC and 21UTC, so interpolation will be required at end of run. Number of input data points: 28663 - 28664 (was 28662 - 28663). Reference height = 2m for temperature and humidity, 10m for wind
  - 3 day experiment: 10 minute data, 433 timesteps, reference height = 55m
  - 3 day experiment: 10 minute data, 433 timesteps, reference height = 2m for temperature and humidity, 10m for wind
Stage 3 forcing details, including driver files
Details of requested model output for SCM and LSM.
Document giving more details on the derivation of the atmospheric model forcing .
Observational datasets for comparison: surface

Timetable

April 2013	Intercomparison forcing data released to participants
June 2013	Results returned by email from stages 1 and 2
20th Sept 2013	Results returned by email from stage 3
14 to 16th Oct	Workshop on initial results from the experiment hosted by the UK Met Office, Exeter

April 2014	Revised case specification released, see email
April/May 2014	Revised case results returned by email from all stages
14-17 July 2014	Discussion session on analysis and writing up of DICE results at the pan-GEWEX conference

Group email list

Please subscribe to the group email list to get updates on the case, or further details of meeting plans, etc. See here for details of how to do this.