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Localization and validation of an urbanized high-resolution land data assimilation system(u-HRLDAS) 被引量:4

Localization and validation of an urbanized high-resolution land data assimilation system(u-HRLDAS)
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摘要 This paper uses an urbanized high-resolution land data assimilation system(u-HRLDAS) to parameterize the urban land surface characteristics.The u-HRLDAS model is localized and developed in order to satisfy the need of the weather forecast in Beijing,China.The remote sensing data used to localize and drive u-HRLDAS include the soil type data and MODIS retrieved leaf area index(LAI) data.The evaporation and water depth for impervious surface in urban area are developed to improve the simulation of u-HRLDAS.The result of the urban weather forecast is used for the comparison based on the rapid update cycle system at Beijing Meteorological Bureau(BJ-RUC) without coupled with u-HRLDAS.The land surface temperature,land surface fluxes,and first layer soil moisture in several single sites and urban Beijing region by BJ-RUC are compared with u-HRLDAS after localization and development.The off-line simulation results indicate that compared with BJ-RUC,after the localization and development,u-HRLDAS can improve the simulation of land surface parameters and fluxes definitely. This paper uses an urbanized high-resolution land data assimilation system (u-HRLDAS) to parameterize the urban land sur- face characteristics. The u-HRLDAS model is localized and developed in order to satisfy the need of the weather forecast in Beijing, China. The remote sensing data used to localize and drive u-HRLDAS include the soil type data and MODIS retrieved leaf area index (LAI) data. The evaporation and water depth for impervious surface in urban area are developed to improve the simulation of u-HRLDAS. The result of the urban weather forecast is used for the comparison based on the rapid update cycle system at Beijing Meteorological Bureau (BJ-RUC) without coupled with u-HRLDAS. The land surface temperature, land surface fluxes, and first layer soil moisture in several single sites and urban Beijing region by BJ-RUC are compared with u-HRLDAS after localization and development. The off-line simulation results indicate that compared with BJ-RUC, after the localization and development, u-HRLDAS can improve the simulation of land surface parameters and fluxes definitely.
出处 《Science China Earth Sciences》 SCIE EI CAS 2013年第6期1071-1078,共8页 中国科学(地球科学英文版)
基金 supported by National Natural Science Foundation of China(Grant No. 41005056) Key Projects in the National Science & Technology Pillar Program during the Eleventh Five-Year Plan Period (GrantNo. 2008BAC37B04)
关键词 u-HRLDAS LOCALIZATION URBAN land surface parameters 陆面数据同化系统 高分辨率 城市化 本地化 北京市气象局 验证 土地 天气预测
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