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Spatial and Temporal Dust Source Variability in Northern China Identified Using Advanced Remote Sensing AnalysisThe aim of this research is to provide a detailed characterization of spatial patterns and temporal trends in the regional and local dust source areas within the desert of the Alashan Prefecture (Inner Mongolia, China). This problem was approached through multi-scale remote sensing analysis of vegetation changes. The primary requirements for this regional analysis are high spatial and spectral resolution data, accurate spectral calibration and good temporal resolution with a suitable temporal baseline. Landsat analysis and field validation along with the low spatial resolution classifications from MODIS and AVHRR are combined to provide a reliable characterization of the different potential dust-producing sources. The representation of intra-annual and inter-annual Normalized Difference Vegetation Index (NDVI) trend to assess land cover discrimination for mapping potential dust source using MODIS and AVHRR at larger scale is enhanced by Landsat Spectral Mixing Analysis (SMA). The combined methodology is to determine the extent to which Landsat can distinguish important soils types in order to better understand how soil reflectance behaves at seasonal and inter-annual timescales. As a final result mapping soil surface properties using SMA is representative of responses of different land and soil cover previously identified by NDVI trend. The results could be used in dust emission models even if they are not reflecting aggregate formation, soil stability or particle coatings showing to be critical for accurately represent dust source over different regional and local emitting areas.
Document ID
20140010310
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Taramelli, A.
(Institute for Environmental Protection and Research (ISPRA) Rome, Italy)
Pasqui, M.
(National Council of Research Italy)
Barbour, J.
(Lamont-Doherty Geological Observatory Palisades, NY, United States)
Kirschbaum, D.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bottai, L.
(Consortium LaMMa - Laboratory for Meteorology and Environmental Modelling Sesto Fiorentino, Italy)
Busillo, C.
(Consortium LaMMa - Laboratory for Meteorology and Environmental Modelling Sesto Fiorentino, Italy)
Calastrini, F.
(Consortium LaMMa - Laboratory for Meteorology and Environmental Modelling Sesto Fiorentino, Italy)
Guarnieri, F.
(Consortium LaMMa - Laboratory for Meteorology and Environmental Modelling Sesto Fiorentino, Italy)
Small, C.
(Lamont-Doherty Geological Observatory Palisades, NY, United States)
Date Acquired
July 29, 2014
Publication Date
June 30, 2013
Publication Information
Publication: Earth Surface Processes and Landforms
Volume: 38
Issue: 8
Subject Category
Earth Resources And Remote Sensing
Report/Patent Number
GSFC-E-DAA-TN7569
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
spectral mixing analysis
NDVI time series
dust source
China
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