DICE workshop discussion summary

Future plans for work on the existing DICE case

• Adrian to investigate revisions to the forcing particularly for the winds and probably involving running a mesoscale simulations for the period to derive the geostrophic wind and compare with forcing derived from budget analysis
  • hopefully produce revised LS forcing by end 2013
• Agree a set of surface characteristics (eg treatment of LAI, bare soil, etc) to try and better constrain evaporation in LSMs
  • Group discussion needed on how best to do this (during GLASS panel meeting this week?)
  • reach consensus and complete new stage 1a runs by early 2014
• Adrian to make observations for DICE period available on website to allow participants to continue their own analysis
  • Investigate somewhere accessible to put all the submitted model data
• Martin/Adrian (input from all): work on methods to analyse model simulations (regime diagrams, appropriate parameter spaces, etc)
  • Adrian to circulate list of suggestions for further analysis and everyone to add to this.
• Need to compile a list of people who supplied data from model runs

Other issues

• GASS should define a standard SCM experiment output format (like ALMA) and methodology for running at a location (deriving forcing, etc)
• GASS and GLASS need to join together to have good documentation for how to set-up a coupled experiment as well.

Future DICE timeline

• Early 2014: produce revised DICE set-up and forcings for participants to rerun
• Spring 2014: submission deadline for revised intercomparison
• Summer 2014: workshop session (location TBC – probably pan-GEWEX conference) to discuss revised results and coordination of data analysis
  • Adrian and Martin to discuss logistics with Bert, Kevin and others
• Summer 2014: submit BAMS overview article
• End 2014: submit DICE intercomparison papers, perhaps using a DICE special issue but which journal?
  • BLM? GABLS 1, 2 and 3 all had special issues in here
  • Land (GLASS) activities mainly in J. HydroMet
  • QJ would potentially reach a wider audience

Dissemination of DICE results

• AGU Fall Meeting December 2013 - Mike and Weizhong gave poster overview
• AMS annual meeting in February 2014 - Martin to give overview talk
• EGU 2014 - Maria has submitted abstract for overview talk
• AMS BLT 9-13 June 2014 (potential alternative to pan-GEWEX for group discussion, Adrian/Martin to discuss with Wayne/John)
• pan-GEWEX conference 14-17 July 2014: current plan is to have further DICE discussion and analysis in a session here
• WWOSC Montreal, 16-21 August 2014 – volunteer to present overview talk? (Martin and Adrian discuss with Ayrton as "local rep"!)
• AGU 2014 (San Fransisco; special sessions requested in September)
• AMS 2015 (Phoenix; earlier deadline than AGU)

Discussion of potential future intercomparison experiments on land-atmosphere coupling

Pros and cons of different potential sites (in no particular order):

• Cabauw
  • KNMI parameterisation testbed, Forcing for SCMs already exists, could run for a year
  • Not a “hotspot”
• AMMA
  • Is a hotspot; column studies already exist; Aaron has contact with this group (also Chris Taylor)
  • Convective cases are hard to set-up (provide forcing for systems advecting over the site)
• LBA over Amazon
  • Soundings exist + eddy covariance
  • Tricky cloud microphysics and large-scale forcing
• SGP ARM site
  • Decade of cloud and soil moisture info; Soundings every 3 hours; Continues from DICE and lessons learnt; links to GASS project "CAUSES"
  • Proposal submitted to look at ~12 days – could be useful to follow on from DICE
  • Propagating MCSs are hard to force in a SCM

After further discussion we concluded the SGP ARM site would be our preference.

• Ask Joe & Craig & Pierre if they could look into this
• Question: do we just want to introduce cloud or both cloud and precip?
  • Could do two different days

Should still look into the AMMA data though – Aaron

Could also look at Cabauw – Bart & Mike