TIER1
•N. America forcing from ECMWF developed and
well tested.
•Catchment model run over retrospective
1979-1993 period.
•Improved forcing gives a good basis for
initiali land conditions.
TIER2
•A surface measurement of soil moisture may be
used to correct the entire soil moisture profile.
•Assimilation of soil moisture has a positive
impact on the water and energy budgets.
•Soil moisture assimilation performs best for
regions with shallower soils; particularly depths less than 3m.
•Reduction of observation error has more
positive impact than increased observation frequency or
resolution.
• Assimilated Dr.
Owe’s surface soil moisture data from SMMR over North America and evaluation
underway.
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