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	Modification and application of the satellite-based land data assimilation scheme for very dry soil regions using AMSR-E images: Model validation for Mongolia - a CEOP data platform
	Mahadevan, Pathmathevan; Koike, Toshio; Fujii, Hideyuki; Tamagawa, Katsunori; Li, Xin; Kaihotsu, Ichirow
刊名	JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN
	2007-02-01
卷号	85A页码:243-260
ISSN号	0026-1165
通讯作者	Mahadevan, Pathmathevan(devan@hydra.t.u-tokyo.ac.jp)
英文摘要	At climatic time-scales, soil moisture is one of the most important boundary condition controlling fluxes to the atmosphere. Here, we explore the feasibility of synthesizing distributed fields of soil moisture using AMSR-E observations and a novel application of data assimilation within a hydrological model. We modified our existing Land Data Assimilation Scheme (LDAS) by specifically considering: (1) weak constraint assumptions rather than a strong constraint, thus accounting for the existence of model errors; and (2) the effects of volume scattering within the soil medium in the Radiative Transfer Model (RTM). Adopting the "effects of volume scattering within the dry soil medium" in the RTM is a new step for satellite-based data assimilation techniques for the retrieval of soil moisture. This LDAS can be used to assess model parameters and estimate vertical profiles of soil moisture, especially in very dry regions (volumetric soil moisture is equal to or less than 5-15%) as well as soil-surface and canopy temperatures by comparing passive microwave observations using a unique minimization technique termed Very Fast Simulated Annealing (VFSA). To validate our new LDAS, AMSR-E observations, gathered in Mongolia, were assimilated into the Land Surface Model (LSM) via the modified RTM. Observed micrometeorology boundary conditions for Mongolia were drawn from the CEOP database. In studies that simulate 2-week dry periods, the results of the revised LDAS are in better agreement with observational data than the results of open-loop simulations.
收录类别	SCI
WOS关键词	DISCRETE-ORDINATE METHOD ; SIMPLE BIOSPHERE MODEL ; RADIATIVE-TRANSFER ; TEMPERATURE PROFILES ; MICROWAVE EMISSION ; MOISTURE ; ATMOSPHERES ; SIMULATION ; ALGORITHM ; STATE
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
语种	英语
出版者	METEOROLOGICAL SOC JPN
WOS记录号	WOS:000246144200013
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2555910
专题	寒区旱区环境与工程研究所
通讯作者	Mahadevan, Pathmathevan
作者单位	1.Univ Tokyo, Dept Civil Engn, Bunkyo Ku, Tokyo 1138656, Japan 2.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou, Peoples R China 3.Hiroshima Univ, Dept Civil Engn, Higashihiroshima 724, Japan
推荐引用方式 GB/T 7714	Mahadevan, Pathmathevan,Koike, Toshio,Fujii, Hideyuki,et al. Modification and application of the satellite-based land data assimilation scheme for very dry soil regions using AMSR-E images: Model validation for Mongolia - a CEOP data platform[J]. JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN,2007,85A:243-260.
APA	Mahadevan, Pathmathevan,Koike, Toshio,Fujii, Hideyuki,Tamagawa, Katsunori,Li, Xin,&Kaihotsu, Ichirow.(2007).Modification and application of the satellite-based land data assimilation scheme for very dry soil regions using AMSR-E images: Model validation for Mongolia - a CEOP data platform.JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN,85A,243-260.
MLA	Mahadevan, Pathmathevan,et al."Modification and application of the satellite-based land data assimilation scheme for very dry soil regions using AMSR-E images: Model validation for Mongolia - a CEOP data platform".JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN 85A(2007):243-260.

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