Институт вычислительной математики
и математической геофизики

The International Conference on Computational Mathematics


Numerical solution of differential and integral equations

Numerical modelling of surface hydrology in Coupled Climate Model

Krupchatnikoff V.N., Krylova A.I.

Institute Computational mathematics and mathematical geophysics SB RAS (Novosibirsk)

The hydrologic cycle over land includes interception of water by plant foliage and wood, throughfall and stemflow, infiltration, runoff, soil water, and snow. These are directly linked to the biogeophysics and also affect temperature, precipitation, and runoff. Total runoff (surface and sub-surface drainage) is routed downstream to oceans using a river routing model. River routing model is based on TOPMODEL ideas [1-2]. TOPMODEL framework is based on the idea that topography is the primary determinant of the distribution of soil moisture at and within the land surface. A river routing model is coupled to the Land Surface Model (ICMMG SB RAS) [3] for hydrological applications and for improved land-ocean-sea ice-atmosphere coupling in the Climate System Model (CSM). We have implemented this model on a 1-degree grid. Land model interpolates the total runoff from the column hydrology (2.8 by 2.8 degree) to the river routing 1-degree grid. Pictures we shown here are results from a regional 1° by 1° simulation (River Tom basin) using global ICMMG LSM. The model is driven with AMIP data from 1979 to 1993. Acknowledgements. The work was supported by RFFI № 03-05 - 96828 and № 01-05-65420. [1] Beven K.J., and M.J.Kirkby, 1979: A physically based variable contributing area model of basin hydrology // Hydrol.Sci.Bull., 24(1),43-69. [2] R.L.Walko et al., 2000: Coupled Atmosphere-Biophysics- Hydrology Models for Environment Modeling // J.Appl.Meteor., 39, 931-944. [3] Krupchatnikov V.N. Simulation of CO2 exchange processes in the atmosphere surface biomes system by climatic model ECSib // Rus.J.Num.Anal.Math.Model.. 1998, Vol.13, N6, P.479-492.

Note. Abstracts are published in author's edition

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