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An evaluation of remotely sensed soil moisture over Australia
| Content Provider | Semantic Scholar |
|---|---|
| Author | Draper Walker, Jeffrey P. Steinle, Philipp |
| Copyright Year | 2007 |
| Abstract | Soil moisture is an important control over atmospheric evolution, since it controls the partition of incoming radiation into latent and sensible heating. To accurately model these land surface fluxes, atmospheric models must ultimately have accurate soil moisture fields. Yet soil moisture is typically initialised indirectly in Numerical Weather Prediction (NWP) models, frequently resulting in unrealistic model soil moisture. For example, both the soil moisture and land-surface fluxes in the Australian NWP system (LAPS) have been observed to be unrealistic (e.g., Ellett et al (2005); Draper and Mills, (2007)). The soil moisture in LAPS is initialised using a background field based on antecedent precipitation and climatological evaporation (following Pescod et al (1994)), which is then incremented (following the scheme developed by Viterbo and Beljaars (1995) at ECMWF) according to low-level forecast humidity errors. A similar scheme is used in the ACCESS model, as run in global mode by the U.K. Met. Office, based on warm-running soil moisture, which is incremented according to low-level forecast humidity and temperature errors (and requires periodic relaxation towards a climatology). |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://users.monash.edu.au/~jpwalker/papers/cahmda08-1.pdf |
| Alternate Webpage(s) | http://users.monash.edu.au/~jpwalker/papers/cawcr07-2.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
