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Improvement of water balance in land surface schemes by random cascade disaggregation of rainfall
Author(s) -
Lammering Birger,
Dwyer Ian
Publication year - 2000
Publication title -
international journal of climatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.58
H-Index - 166
eISSN - 1097-0088
pISSN - 0899-8418
DOI - 10.1002/(sici)1097-0088(200005)20:6<681::aid-joc492>3.0.co;2-p
Subject(s) - throughfall , environmental science , cascade , water balance , evaporation , canopy , hydrology (agriculture) , climatology , meteorology , atmospheric sciences , soil water , geology , soil science , geography , chemistry , geotechnical engineering , archaeology , chromatography
A random cascade disaggregation of spatial rainfall is incorporated into the one‐dimensional hydrological component of the UK Meteorological Office Surface Exchange Scheme (MOSES) used in their general circulation model (GCM). The results of several simulations using exponentially distributed, disaggregated and evenly distributed rainfall are compared. The changes in the water balance—in particular the throughfall and the evaporation from the canopy—are assessed. It is shown that a disaggregation using random cascades gives closer values to the reference simulation of canopy evaporation and throughfall variables than the conventional approach. Copyright © 2000 Royal Meteorological Society