The implementation and validation of improved land-surface hydrology in an atmospheric general circulation model

Journal Article · Tue Jun 01 04:00:00 EDT 1993 · Journal of Climate; (United States)

DOI:https://doi.org/10.1175/1520-0442(1993)006<1009:TIAVOI>2.0.CO;2· OSTI ID:6064355

Johnson, K D; Entekhabi, D; Eagleson, P S ^[1]

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1. Massachusetts Institute of Technology, Cambridge (United States)

New land-surface hydrologic parameterizations are implemented into the NASA Goddard Institute for Space Studies (GISS) General Circulation Model (GCM). These parameterizations are: (1) runoff and evapotranspiration functions that include the effects of subgrid-scale spatial variability and use physically based equations of hydrologic flux at the soil surface and (2) a realistic soil moisture diffusion scheme for the movement of water and root sink in the soil column. A one-dimensional climate model with a complete hydrologic cycle is used to screen the basic sensitivities of the hydrological parameterizations before implementation into the full three-dimensional GCM. Results of the final the GISS GCM and the new land-surface hydrology indicate that the runoff rate, I simulation with t d. As a result, the remaining components of the heat and especially in the tropics, is significantly improve moisture balance show similar improvements when compared to observations. zonal, The validation of model results is carried from the large global (ocean and land-surface) scale to the continental, and finally the regional river basin scales. 21 refs., 13 figs., 1 tab.

• OSTI ID: 6064355
• Journal Information: Journal of Climate; (United States), Journal Name: Journal of Climate; (United States) Vol. 6:6; ISSN JLCLEL; ISSN 0894-8755
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540110*
540210 -- Environment
Terrestrial-- Basic Studies-- (1990-)
AIR-WATER INTERACTIONS
ATMOSPHERIC CIRCULATION
CHEMISTRY
ENVIRONMENTAL TRANSPORT
EVAPORATION
GENERAL CIRCULATION MODELS
GLOBAL ASPECTS
HYDROLOGY
IMPLEMENTATION
MASS TRANSFER
MATHEMATICAL MODELS
MOISTURE
PHASE TRANSFORMATIONS
RUNOFF
SOIL CHEMISTRY
TESTING
VALIDATION