A new river flooding scheme for global climate applications: Off-line evaluation over South America
Given their strong interaction with both climate and the carbon cycle, wetlands and surface waters need to be parameterized in global general circulation models. For this purpose, a new simple flooding river scheme is proposed and evaluated over South America. The flood dynamics is described through...
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Published in: | Journal of Geophysical Research - Atmospheres Vol. 113; no. D11; pp. D11110 - n/a |
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Main Authors: | , , , , |
Format: | Journal Article |
Language: | English |
Published: |
Washington, DC
American Geophysical Union
16-06-2008
Blackwell Publishing Ltd |
Subjects: | |
Online Access: | Get full text |
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Summary: | Given their strong interaction with both climate and the carbon cycle, wetlands and surface waters need to be parameterized in global general circulation models. For this purpose, a new simple flooding river scheme is proposed and evaluated over South America. The flood dynamics is described through the coupling between the ISBA land surface model and the TRIP river routing model including a prognostic flood reservoir. This reservoir fills when the river height exceeds a critical value and vice versa. The reservoir interacts with the soil hydrology through infiltration and with the overlying atmosphere through precipitation interception and free water surface evaporation. The model is tested in off‐line mode using the 10‐year ISLSCP‐2 atmospheric forcing. The evaluation is made against satellite‐derived inundation estimates as well as in situ river discharge observations. Besides a basin‐scale increase in annual surface evaporation, the results show improved monthly discharges over the Amazon and Parana rivers, as well as a reasonable agreement between the simulated flooded areas and satellite‐derived inundation estimates. |
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Bibliography: | ArticleID:2007JD009376 ark:/67375/WNG-T5GBB27W-0 istex:22A8B875506B1C49EC3AF3E44CB536CE44C95045 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0148-0227 2169-897X 2156-2202 2169-8996 |
DOI: | 10.1029/2007JD009376 |