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Comments on ““Use of Midlatitude Soil Moisture and Meteorological Observations to Validate Soil Moisture Simulations with Biosphere and Bucket Models””

Comments on ““Use of Midlatitude Soil Moisture and Meteorological Observations to Validate Soil... Robock et al. (1995) discussed simulations using SSiB ( Xue et. al. 1991 ), which is a simplified version of the Simple Biosphere (SiB) model ( Sellers et al. 1986 ). In this evaluation of the performance of SSiB, Russian soil moisture data ( Vinnikov and Yeserkepova 1991 ) were used. Robock et al. (1995) reported two major problems: 1) failure to reproduce the soil moisture peak related to the spring snowmelt and 2) substantial differences in the magnitude of the seasonal variations and the annual-mean values for some stations, even though the phase of the annual cycle was reasonable. Robock et al. give the impression that there is something incorrect about the basic model formulation. In this note we will show that the problems highlighted by Robock et al. can be ameliorated by correctly assigning the surface properties and by correctly partitioning the snowmelt between runoff and infiltration for frozen soil. We have analyzed the problems. It seems that the first problem was caused by improper partitioning of snowmelt into infiltration and runoff when the soil surface was below freezing. A simple improvement was made to correct the first problem. In a revised version of the snow http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Climate American Meteorological Society

Comments on ““Use of Midlatitude Soil Moisture and Meteorological Observations to Validate Soil Moisture Simulations with Biosphere and Bucket Models””

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Publisher
American Meteorological Society
Copyright
Copyright © 1995 American Meteorological Society
ISSN
1520-0442
DOI
10.1175/1520-0442(1997)010<0374:COUOMS>2.0.CO;2
Publisher site
See Article on Publisher Site

Abstract

Robock et al. (1995) discussed simulations using SSiB ( Xue et. al. 1991 ), which is a simplified version of the Simple Biosphere (SiB) model ( Sellers et al. 1986 ). In this evaluation of the performance of SSiB, Russian soil moisture data ( Vinnikov and Yeserkepova 1991 ) were used. Robock et al. (1995) reported two major problems: 1) failure to reproduce the soil moisture peak related to the spring snowmelt and 2) substantial differences in the magnitude of the seasonal variations and the annual-mean values for some stations, even though the phase of the annual cycle was reasonable. Robock et al. give the impression that there is something incorrect about the basic model formulation. In this note we will show that the problems highlighted by Robock et al. can be ameliorated by correctly assigning the surface properties and by correctly partitioning the snowmelt between runoff and infiltration for frozen soil. We have analyzed the problems. It seems that the first problem was caused by improper partitioning of snowmelt into infiltration and runoff when the soil surface was below freezing. A simple improvement was made to correct the first problem. In a revised version of the snow

Journal

Journal of ClimateAmerican Meteorological Society

Published: Oct 16, 1995

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