Evapotranspiration and runoff from large land areas: Land surface hydrology for atmospheric general circulation models

A land surface hydrology parameterization for use in atmospheric GCMs is presented. The parameterization incorporates subgrid scale variability in topography, soils, soil moisture and precipitation. The framework of the model is the statistical distribution of a topography-soils index, which controls the local water balance fluxes, and is therefore taken to represent the large land area. Spatially variable water balance fluxes are integrated with respect to the topography-soils index to yield our large scale parameterizations: water balance calculations are performed for a number of intervals of the topography-soils distribution, and interval responses are weighted by the probability of occurrence of the interval. Grid square averaged land surface fluxes result. The model functions independently as a macroscale water balance model. Runoff ratio and evapotranspiration efficiency parameterizations are derived and are shown to depend on the spatial variability of the above mentioned properties and processes, as well at the dynamics of land surface-atmosphere interactions.

[1]  S. Manabe.  CLIMATE AND THE OCEAN CIRCULATION1 , 1969 .

[2]  K. Beven,et al.  Testing a physically-based flood forecasting model (TOPMODEL) for three U.K. catchments , 1984 .

[3]  O. T. Denmead.  Availability of soil water to plants , 1961 .

[4]  R. Horton.  The Rôle of infiltration in the hydrologic cycle , 1933 .

[5]  Fred J. Molz,et al.  Models of water transport in the soil‐plant system: A review , 1981 .

[6]  Ignacio Rodriguez-Iturbe,et al.  Application of spatial Poisson models to air mass thunderstorm rainfall , 1987 .

[7]  Daniel Hillel,et al.  Applications of soil physics , 1980 .

[8]  Keith Beven,et al.  On hydrologic similarity: 2. A scaled model of storm runoff production , 1987 .

[9]  P. S. Eagleson,et al.  Land Surface Hydrology Parameterization for Atmospheric General Circulation models Including Subgrid Scale Spatial Variability , 1989 .

[10]  J. Philip,et al.  THE THEORY OF INFILTRATION: 4. SORPTIVITY AND ALGEBRAIC INFILTRATION EQUATIONS , 1957 .

[11]  H. E. Jobson.  Evaporation Into the Atmosphere: Theory, History, and Applications , 1982 .

[12]  A. Dalcher,et al.  A Simple Biosphere Model (SIB) for Use within General Circulation Models , 1986 .

[13]  C. Rosenzweig,et al.  Improved Ground Hydrology Calculations for Global Climate Models (GCMs): Soil Water Movement and Evapotranspiration , 1988 .

[14]  Syukuro Manabe,et al.  THE ATMOSPHERIC CIRCULATION AND THE HYDROLOGY OF THE EARTH ’ S SURFACE , 1969 .

[15]  P. S. Eagleson,et al.  Tracer water transport and subgrid precipitation variation within atmospheric general circulation models , 1988 .

[16]  Keith Beven,et al.  On subsurface stormflow: an analysis of response times , 1982 .

[17]  K. Beven,et al.  A physically based, variable contributing area model of basin hydrology , 1979 .

[18]  J. Philip,et al.  The Theory of Infiltration , 1958 .

[19]  R. D. Black,et al.  Partial Area Contributions to Storm Runoff in a Small New England Watershed , 1970 .

[20]  Keith Beven,et al.  Effects of spatial variability and scale with implications to hydrologic modeling , 1988 .

[21]  K. Beven,et al.  The Relationship of Catchment Topography and Soil Hydraulic Characteristics to Lake Alkalinity in the , 1989 .

[22]  J. Philip.  EVAPORATION, AND MOISTURE AND HEAT FIELDS IN THE SOIL , 1957 .

[23]  Keith Beven,et al.  Catchment geomorphology and the dynamics of runoff contributing areas , 1983 .

[24]  Reinder A. Feddes,et al.  Simulation of field water uptake by plants using a soil water dependent root extraction function , 1976 .

[25]  Keith Beven,et al.  Runoff Production and Flood Frequency in Catchments of Order n: An Alternative Approach , 1986 .

[26]  W. G. Knisel.  Comments on ‘Role of subsurface flow in generating surface runoff: 2, upstream source areas’ by R. Allan Freeze , 1973 .

[27]  J. Shukla,et al.  Influence of Land-Surface Evapotranspiration on the Earth's Climate , 1982, Science.