Arid
DOI10.1175/2011JCLI4034.1
Evaluation of MERRA Land Surface Estimates in Preparation for the Soil Moisture Active Passive Mission
Yi, Yonghong1,2; Kimball, John S.1,2; Jones, Lucas A.1,2; Reichle, Rolf H.3; McDonald, Kyle C.4
通讯作者Yi, Yonghong
来源期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2011
卷号24期号:15页码:3797-3816
英文摘要

The authors evaluated several land surface variables from the Modern-Era Retrospective Analysis for Research and Applications (MERRA) product that are important for global ecological and hydrological studies, including daily maximum (T-max) and minimum (T-min) surface air temperatures, atmosphere vapor pressure deficit (VPD), incident solar radiation (SWrad), and surface soil moisture. The MERRA results were evaluated against in situ measurements, similar global products derived from satellite microwave [the Advanced Microwave Scanning Radiometer for Earth Observing System (EOS) (AMSR-E)] remote sensing and earlier generation atmospheric analysis [Goddard Earth Observing System version 4 (GEOS-4)] products. Relative to GEOS-4, MERRA is generally warmer (similar to 0.5 degrees C for T-min and T-max) and drier (similar to 50 Pa for VPD) for low-and middle-latitude regions (< 50 degrees N) associated with reduced cloudiness and increased SWrad. MERRA and AMSR-E temperatures show relatively large differences (> 3 degrees C) in mountainous areas, tropical forest, and desert regions. Surface soil moisture estimates from MERRA (0-2-cm depth) and two AMSR-E products (similar to 0-1-cm depth) are moderately correlated (R similar to 0.4) for middle-latitude regions with low to moderate vegetation biomass. The MERRA derived surface soil moisture also corresponds favorably with in situ observations (R = 0.53 +/- 0.01, p < 0.001) in the midlatitudes, where its accuracy is directly proportional to the quality of MERRA precipitation. In the high latitudes, MERRA shows inconsistent soil moisture seasonal dynamics relative to in situ observations. The study’s results suggest that satellite microwave remote sensing may contribute to improved reanalysis accuracy where surface meteorological observations are sparse and in cold land regions subject to seasonal freeze-thaw transitions. The upcoming NASA Soil Moisture Active Passive (SMAP) mission is expected to improve MERRA-type reanalysis accuracy by providing accurate global mapping of freeze-thaw state and surface soil moisture with 2-3-day temporal fidelity and enhanced (<= 9 km) spatial resolution.


类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000293823900001
WOS关键词BOREAL ; WATER ; SIMULATIONS ; RESOLUTION ; RETRIEVAL ; MODELS ; IMPACT ; FLUXES ; COVER ; MODIS
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/169036
作者单位1.Univ Montana, Flathead Lake Biol Stn, Polson, MT 59860 USA;
2.Univ Montana, Numer Terradynam Simulat Grp, Missoula, MT 59812 USA;
3.NASA, Goddard Space Flight Ctr, Global Modeling & Assimilat Off, Greenbelt, MD 20771 USA;
4.CALTECH, Jet Prop Lab, Pasadena, CA USA
推荐引用方式
GB/T 7714
Yi, Yonghong,Kimball, John S.,Jones, Lucas A.,et al. Evaluation of MERRA Land Surface Estimates in Preparation for the Soil Moisture Active Passive Mission[J],2011,24(15):3797-3816.
APA Yi, Yonghong,Kimball, John S.,Jones, Lucas A.,Reichle, Rolf H.,&McDonald, Kyle C..(2011).Evaluation of MERRA Land Surface Estimates in Preparation for the Soil Moisture Active Passive Mission.JOURNAL OF CLIMATE,24(15),3797-3816.
MLA Yi, Yonghong,et al."Evaluation of MERRA Land Surface Estimates in Preparation for the Soil Moisture Active Passive Mission".JOURNAL OF CLIMATE 24.15(2011):3797-3816.
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