Comparison analysis of AVHRR LST/Albedo temporal changes and TSP data: a case study on strong duststorm process during March to May,2001
Received date: 2003-04-08
Revised date: 2003-08-11
Online published: 2004-02-15
In the spring of 2001, several duststorm events occurred in northern China which seriously threatened production and people’s life and caused troubles to air transportations in South Korea and Japan. The duststorm weather was a strong wind erosion process in terms of duststorm source, transportation and precipitation. The mechanism of duststorm process is the cornerstone for duststorm forecast model. Estphal(1988), Joussaume(1990)and Gillette (1989) published a wind erosion based model;Shao (1997)and Lu (2001) took five different factors into account developing an integrated model including climate condition, land cover/change, wind erosion, transportation as well as precipitation factors. The duststorm also had very close relation with surface physical parameters such as soil moisture, temperature roughness and radiation which were the very important parameters for land and air energy exchange. They also played important roles in duststorm process. Brest(1987),Tian(1990) and Zu Hanwen(1993) pubilshed their retrieving models for albedo and temperature using AVHRR data. By using remote sensing data to monitor dust clouds change, transportation road and to retrieve surface temperature, soil moisture, roughness in compensation to the shortcomings of sparsely located observation stations and discontinues data collection. The data retrieved from satellite has become very important data source for duststorm monitoring. Chinese and Japanese-initiated a joint project in 2000 to set up ground observation stations along dust source areas such as transportation roads,precipitation areas for collecting TSP (dry dust precipitation) and utilizing AVHRR data to retrieve albedo(surface energy).And then data were selected from retrieved albedo temporal imageries to make curves and comparison was made between albedo curves and TSP curves. The result showed that there were good correlation betweens the two kinds of curves. It was proved that the LST/Albedo could be one of the physical parameters for predicting duststorm in future monitoring systems.
Key words： dust source area; surface LST/Albedo; TSP data
HAN Xiu-zhen,MA Jian-wen,LIU Zhi-li, ZHANG Xiao-ye . Comparison analysis of AVHRR LST/Albedo temporal changes and TSP data: a case study on strong duststorm process during March to May,2001[J]. GEOGRAPHICAL RESEARCH, 2004 , 23(1) : 19 -28 . DOI: 10.11821/yj2004010003
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