DOI: 10.5194/hess-18-1323-2014
Scopus记录号: 2-s2.0-84898066816
论文题名: Long term soil moisture mapping over the Tibetan plateau using special sensor microwave/imager
作者: Van Der Velde R ; , Salama M ; S ; , Pellarin T ; , Ofwono M ; , Ma Y ; , Su Z
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期: 4 起始页码: 1323
结束页码: 1337
语种: 英语
Scopus关键词: Earth sciences
; Hydrology
; Colorado state universities
; Land data assimilation systems
; Potential evapotranspiration
; Radiative transfer model
; Root mean squared errors
; Soil moisture retrievals
; Special sensor microwave imagers
; Special sensor microwave/Imager
; Soil moisture
; algorithm
; anomaly
; error correction
; evapotranspiration
; microwave imagery
; precipitation (climatology)
; radiative transfer
; soil moisture
; SSM-I
; trend analysis
; wetting
; China
; Qinghai-Xizang Plateau
英文摘要: This paper discusses soil moisture retrievals over the Tibetan Plateau from brightness temperature (TB's) observed by the Special Sensor Microwave Imagers (SSM/I's) during the warm seasons of the period from July 1987 to December 2008. The Fundamental Climate Data Record (FCDR) of F08, F11 and F13 SSM/I satellites by the Precipitation Research Group of Colorado State University is used for this study. A soil moisture retrieval algorithm is developed based on a radiative transfer model that simulates top-of-atmosphere TB's whereby effects of atmosphere are calculated from near-surface forcings obtained from a bias-corrected dataset. Validation of SSM/I retrievals against in situ measurements for a two-and-half year period (225 matchups) gives a Root Mean Squared Error of 0.046 m3 mg-3. The agreement between retrievals and Noah simulations from the Global Land Data Assimilation System is investigated to further provide confidence in the reliability of SSM/I retrievals at the Plateau-scale. Normalised soil moisture anomalies (N) are computed on a warm seasonal (May-October) and on a monthly basis to analyse the trends present within the products available from July 1987 to December 2008. The slope of linear regression functions between N and time is used to quantify the trends. Both the warm season and monthly N indicate severe wettings of 0.8 to almost 1.6 decadeg-1 in the centre of the Plateau. Correlations are found by the trend with elevation for the warm season as a whole and the individual months May, September and October. The observed wetting of the Tibetan Plateau agrees with recent findings on permafrost retreat, precipitation increase and potential evapotranspiration decline. © Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78278
Appears in Collections: 气候变化事实与影响
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作者单位: Faculty of ITC, University of Twente, Enschede, Netherlands; Centre National de la Recherche Scientifique, Laboratoire d'études des Transferts en Hydrologie et Environnement, Grenoble, France; Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Science, Beijing, China; Institute of Geodesy and Cartography (IGIK), Department of Remote Sensing, Warsaw, Poland
Recommended Citation:
Van Der Velde R,, Salama M,S,et al. Long term soil moisture mapping over the Tibetan plateau using special sensor microwave/imager[J]. Hydrology and Earth System Sciences,2014-01-01,18(4)