Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1175/2011JCLI4034.1 |
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
![]() |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
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. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。