GSWP 1.5

This is a summary of the informal workshop of the Global Soil Wetness Project held in Norman, Oklahoma, on May 15, 2000. The questions below will be considered in the action plan of the GSWP 1.5.

1. Can LSS's produce a runoff within observational range when driven by the range of "observed" precipitation?
   • Average together available global monthly gridded precipitation products at 1^o resolution
   • Take minimum & maximum (locally) among all datasets & compile as 2 additional precipitation datasets.
   • Apply same hybridization as ISLSCP initiative 1.
2. What is the spatial & inter-model variability of potential evaporation & soil dry-down in LSSs?
   • Maintain saturated soil for one full year of integration with no precipitation (no canopy interception save dew)
   • Release soil water constraint and integrate for 10 years to monitor dry down. Perhaps 2 release points:
     • one at 1 January,
     • and one at 1 July.
3. Rerun control integration with the latest version of the LSS, too.
4. Are models operating in different BETA ranges?
   • How far (in time) is the control integration operating from its field capacity or "wilting point"?
5. Can we set the transfer functions of soil moisture among LSSs?
   • Compare soil moisture from two LSSs in 1987 and obtain some transfer function which convert the soil moisture from one LSS to another. See the applicability of the function for the data in 1988.
6. Preparation for GSWP2 under GLASS:
   • "ALMAize" the input/output data format.
   • "ALMAize" the tools handling the input/output datasets.

• Rhone: Strong support for having this in GSWP2 regional or PILPS [a la 2(c)]
• Carbon: The last frontier (before nitrogen, dynamic vegetation)
  • Maybe more appropriate for local/coupled?

Taikan Oki