Operational readiness of microwave remote sensing of soil moisture for hydrologic applications

被引:361
作者
Wagner, Wolfgang [1 ]
Bloeschl, Guenter
Pampaloni, Paolo
Calvet, Jean-Christophe
Bizzarri, Bizzarro
Wigneron, Jean-Pierre
Kerr, Yann
机构
[1] Vienna Univ Technol, Inst Photogrammetry & Remote Sensing, Christian Doppler Lab, A-1040 Vienna, Austria
[2] Vienna Univ Technol, Inst Hydraul & Water Resources Engn, A-1040 Vienna, Austria
[3] CNR, Ist Fis Applicata Carrara, I-50127 Florence, Italy
[4] Ctr Natl Rech Meteorol Meteo France, Toulouse 1, France
[5] CNR, Ist Sci Atmosfera & Clima, Sede Roma, I-00133 Rome, Italy
[6] INRA, EPHYSE, UR1263, F-33140 Villenave Dornon, France
[7] Ctr Etud Spatiales Biosphere, F-31401 Toulouse 9, France
关键词
data assimilation; hydrology; operational systems; remote sensing; review; soil moisture;
D O I
10.2166/nh.2007.029
中图分类号
TV21 [水资源调查与水利规划];
学科分类号
081501 ;
摘要
Microwave remote sensing of soil moisture has been an active area of research since the 1970s but has yet found little use in operational applications. Given recent advances in retrieval algorithms and the approval of a dedicated soil moisture satellite, it is time to re-assess the potential of various satellite systems to provide soil moisture information for hydrologic applications in an operational fashion. This paper reviews recent progress made with retrieving surface soil moisture from three types of microwave sensors - radiometers, Synthetic Aperture Radars (SARs), and scatterometers. The discussion focuses on the operational readiness of the different techniques, considering requirements that are typical for hydrological applications. It is concluded that operational coarse-resolution (25 - 50 km) soil moisture products can be expected within the next few years from radiometer and scatterometer systems, while scientific and technological breakthroughs are still needed for operational soil moisture retrieval at finer scales (< 1 km) from SAR. Also, further research on data assimilation methods is needed to make best use of the coarse-resolution surface soil moisture data provided by radiometer and scatterometer systems in a hydrologic context and to fully assess the value of these data for hydrological predictions.
引用
收藏
页码:1 / 20
页数:20
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