scholarly journals EFFECTS OF URBAN HEATING ON DEVELOPMENT OF THE NERIMA HEAVY RAINFALL BY A CLOUD RESOLVING MODEL COUPLED WITH A PRECISE LAND SURFACE MODEL

2006 ◽  
Vol 50 ◽  
pp. 385-390 ◽  
Author(s):  
Yotaro ITO ◽  
Qoosaku MOTEKI ◽  
Kazuyoshi SOUMA ◽  
Kazuaki YOROZU ◽  
Kenji TANAKA ◽  
...  
Keyword(s):  
Land Surface ◽  
Heavy Rainfall ◽  
Land Surface Model ◽  
Surface Model ◽  
Cloud Resolving Model

scholarly journals Validation of the Coupled NCEP Mesoscale Spectral Model and an Advanced Land Surface Model over the Hawaiian Islands. Part I: Summer Trade Wind Conditions and a Heavy Rainfall Event*

2005 ◽  
Vol 20 (6) ◽  
pp. 847-872 ◽  
Author(s):  
Yongxin Zhang ◽  
Yi-Leng Chen ◽  
Song-You Hong ◽  
Hann-Ming Henry Juang ◽  
Kevin Kodama
Keyword(s):  
Land Surface ◽  
Heavy Rainfall ◽  
Hawaiian Islands ◽  
Land Surface Model ◽  
Rainfall Event ◽  
Spectral Model ◽  
Trade Wind ◽  
Heavy Rainfall Event ◽  
Surface Model ◽  
Surface Sites

Abstract Validations of the 10-km operational Regional Spectral Model (RSM) and the coupled Mesoscale Spectral Model (MSM) with an advanced land surface model (LSM) forecasts during a 1-month period from 20 May through 20 June 2002 are performed at three surface sites on the island of Oahu. One heavy rainfall case over the Hawaiian Islands is also simulated using the MSM–LSM. Over land with adequate representation of the terrain, the 1.5-km MSM provides better forecasts of surface variables than the 10-km operational RSM. However, there are still appreciable discrepancies between the MSM simulations and observations. Further improvements are achieved by coupling the MSM with the LSM. In particular, overestimation of the surface wind speed and daytime cold biases experienced by the MSM are largely corrected in the coupled MSM–LSM. Composite analyses of surface variables at three surface sites under different trade wind conditions show that the observed diurnal cycles in 2-m temperature, 2-m dewpoint temperature, and 10-m wind are better forecasted by the MSM–LSM than by the MSM. The observed daytime minima in 2-m dewpoint temperatures during the strong trade wind days at two urban sites are reproduced by the MSM–LSM. The heavy rainfall case studies presented herein indicate that the high-resolution MSM–LSM has better capability in simulating localized rainfall distributions and airflows associated with the heavy rainfall event than the 10-km RSM–LSM. A major model bias is that the MSM–LSM produces excessive rainfall on the windward side of the island of Oahu with no rainfall downstream of the mountain ridges, in contrast to the observed rainfall distribution that shows the maximum rainfall axis occurring slightly downstream of the mountain ridges.

L'apport de la télédétection spatiale à la modélisation des surfaces continentales

2020 ◽  
pp. 052
Author(s):  
Jean-Christophe Calvet ◽  
Jean-Louis Champeaux
Keyword(s):  
Satellite Data ◽  
Land Surface ◽  
Land Surface Model ◽  
Static Model ◽  
Geographic Information ◽  
Surface Model ◽  
Model Parameters

Cet article présente les différentes étapes des développements réalisés au CNRM des années 1990 à nos jours pour spatialiser à diverses échelles les simulations du modèle Isba des surfaces terrestres. Une attention particulière est portée sur l'intégration, dans le modèle, de données satellitaires permettant de caractériser la végétation. Deux façons complémentaires d'introduire de l'information géographique dans Isba sont présentées : cartographie de paramètres statiques et intégration au fil de l'eau dans le modèle de variables observables depuis l'espace. This paper presents successive steps in developments made at CNRM from the 1990s to the present-day in order to spatialize the simulations of the Isba land surface model at various scales. The focus is on the integration in the model of satellite data informative about vegetation. Two complementary ways to integrate geographic information in Isba are presented: mapping of static model parameters and sequential assimilation of variables observable from space.

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