UPSCALING SPARSE GROUND-BASED SOIL MOISTURE OBSERVATIONS FOR THE VALIDATION OF COARSE-RESOLUTION SATELLITE SOIL MOISTURE PRODUCTS

被引：530

作者：

Crow, Wade T. ^{[1
]}

Berg, Aaron A. ^{[2
]}

Cosh, Michael H. ^{[1
]}

Loew, Alexander ^{[4
]}

Mohanty, Binayak P. ^{[5
]}

Panciera, Rocco ^{[6
]}

de Rosnay, Patricia ^{[3
]}

Ryu, Dongryeol ^{[6
]}

Walker, Jeffrey P. ^{[7
]}

机构：

[1] ARS, Hydrol & Remote Sensing Lab, USDA, Beltsville, MD 20705 USA

[2] Univ Guelph, Dept Geog, Guelph, ON N1G 2W1, Canada

[3] European Ctr Medium Range Weather Forecastsing, Reading RG2 9AX, Berks, England

[4] Max Planck Inst Meteorol, D-20146 Hamburg, Germany

[5] Texas A&M Univ, Dept Biol & Agr Engn, College Stn, TX 77843 USA

[6] Univ Melbourne, Dept Infrastruct Engn, Melbourne, Vic 3010, Australia

[7] Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia

来源：

REVIEWS OF GEOPHYSICS | 2012年 / 50卷

关键词：

POLARIMETRIC SCANNING RADIOMETER; REMOTE-SENSING FOOTPRINTS; TEMPORAL STABILITY; SPATIAL VARIABILITY; WATER CONTENT; IN-SITU; C-BAND; MICROWAVE; RETRIEVAL; SCALES;

D O I：

10.1029/2011RG000372

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The contrast between the point-scale nature of current ground-based soil moisture instrumentation and the ground resolution (typically >10(2) km(2)) of satellites used to retrieve soil moisture poses a significant challenge for the validation of data products from current and upcoming soil moisture satellite missions. Given typical levels of observed spatial variability in soil moisture fields, this mismatch confounds mission validation goals by introducing significant sampling uncertainty in footprint-scale soil moisture estimates obtained from sparse ground-based observations. During validation activities based on comparisons between ground observations and satellite retrievals, this sampling error can be misattributed to retrieval uncertainty and spuriously degrade the perceived accuracy of satellite soil moisture products. This review paper describes the magnitude of the soil moisture upscaling problem and measurement density requirements for ground-based soil moisture networks. Since many large-scale networks do not meet these requirements, it also summarizes a number of existing soil moisture upscaling strategies which may reduce the detrimental impact of spatial sampling errors on the reliability of satellite soil moisture validation using spatially sparse ground-based observations.

引用

页数：20

共 113 条

[1]

Azcurra C., 2006, P 18 WORLD IMACS MOD, P3675

[2] Initial soil moisture retrievals from the METOP-A Advanced Scatterometer (ASCAT) [J].

Bartalis, Zoltan ;

Wagner, Wolfgang ;

Naeimi, Vahid ;

Hasenauer, Stefan ;

Scipal, Klaus ;

Bonekamp, Hans ;

Figa, Julia ;

Anderson, Craig .

GEOPHYSICAL RESEARCH LETTERS, 2007, 34 (20)

[3] ANALYSIS OF SURFACE MOISTURE VARIATIONS WITHIN LARGE-FIELD SITES [J].

BELL, KR ;

BLANCHARD, BJ ;

SCHMUGGE, TJ ;

WITCZAK, MW .

WATER RESOURCES RESEARCH, 1980, 16 (04) :796-810

[4] Streamflow predictability in the Saskatchewan/Nelson River basin given macroscale estimates of the initial soil moisture status [J].

Berg, Aaron A. ;

Mulroy, Kathleen A. .

HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES, 2006, 51 (04) :642-654

[5] Subpixel variability of remotely sensed soil moisture: An inter-comparison study of SAR and ESTAR [J].

Bindlish, R ;

Barros, AP .

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2002, 40 (02) :326-337

[6] Soil moisture spatial variability in experimental areas of central Italy [J].

Brocca, L. ;

Morbidelli, R. ;

Melone, F. ;

Moramarco, T. .

JOURNAL OF HYDROLOGY, 2007, 333 (2-4) :356-373

[7] ASCAT soil wetness index validation through in situ and modeled soil moisture data in central Italy [J].

Brocca, L. ;

Melone, F. ;

Moramarco, T. ;

Wagner, W. ;

Hasenauer, S. .

REMOTE SENSING OF ENVIRONMENT, 2010, 114 (11) :2745-2755

[8] Spatial-temporal variability of soil moisture and its estimation across scales [J].

Brocca, L. ;

Melone, F. ;

Moramarco, T. ;

Morbidelli, R. .

WATER RESOURCES RESEARCH, 2010, 46

[9] Rising temperature depletes soil moisture and exacerbates severe drought conditions across southeast Australia [J].

Cai, Wenju ;

Cowan, Tim ;

Briggs, Peter ;

Raupach, Michael .

GEOPHYSICAL RESEARCH LETTERS, 2009, 36

[10] Validation of ERS scatterometer-derived soil moisture data in the central part of the Duero Basin, Spain [J].

Ceballos, A ;

Scipal, K ;

Wagner, W ;

Martínez-Fernández, J .

HYDROLOGICAL PROCESSES, 2005, 19 (08) :1549-1566

← 1 2 3 4 5 6 7 8 9 10 →