干旱区生态环境知识资源中心(Arid): 应用遥感技术估算东亚沙尘携沙量

Arid

	应用遥感技术估算东亚沙尘携沙量
其他题名	Estimation of Mass Loading to Asia Dust Using Remote Sensing Technique
	延昊 1; 王长耀 1; 牛铮 1; 刘正军 1; 张晔萍 2
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2002
卷号	16 期号:1 页码:120-123
中文摘要	应用中国重点城市环境监测站的大气可吸入颗粒物PM_(10)指标和NOAA-AVHRR的大气上界的反射率指标，首先从遥感影象上确定沙尘。同时利用单通道遥感方法，从AVHRR可见光通道反演东亚沙尘气溶胶光学厚度的空间分布，进一步依据沙尘气溶胶光学厚度与沙尘载荷的定量关系，估算出一次东亚沙土的携沙量。基于卫星遥感的沙土携沙量为凤力侵蚀的定量研究提供了一个新方法。
英文摘要	The large-scale outbreak of Asia dust is detected from NOAA-AVHRR data. Dust appears as a greyish white area with a fairly gossamer texture in visible spectrum satellite image. Furthermore the detection of Asia dust is verified by using the air quality index (PM_(10)). Based on above criterion, this paper selects one orbit of AVHRR image (March,1,2001) as dust research data. Second, optical thickness is one primary parameter to describe extinction effect of dust aerosol, so one lookup table (LUT) of optical thickness is built by calculating radiative transfer equation over a wide range of optical thickness, TOA reflectance, solar angles, scan angles and active angles, and the following information is utilized in the calculation: the first channel of AVHRR is visible band (0.58～0.68 mu), surface reflectivity of the ocean is 0.02, atmosphere model is mid-latitude winter and aerosol model is the shettle desert model. Therefore, optical thickness of dust aerosol can be retrieved from AVHRR reflectance by using LUT. The contour map of satellite inferred dust optical thickness in Yellow Sea and Bohai Bay indicates that maximum value reaches to 4.0 and optical thickness exceeds 1 in most dust affected area. Bohai Bay indicates that maximum value reaches to 4.0 and optical thickness exceeds 1 in most dust affected area. According to some research, optical thickness tau_(0.55) of dust aerosol is proportional to mass loading M of an atmosphere column extending from the surface to the top of the atmosphere, so estimate mass loading from the inverse model M = 1.18 * tau_(0.55)~(1.28), and the map of mass loading shows that the dust mass in dust affected sea area is about 0.64Mt.
中文关键词	东亚沙尘 ; 风蚀 ; 光学厚度 ; 携沙量
英文关键词	asia dust wind erosion optical thickness mass loading NOAA-AVHRR
语种	中文
国家	中国
收录类别	CSCD
WOS类目	REMOTE SENSING
WOS研究方向	Remote Sensing
CSCD记录号	CSCD:1142149
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/203439
作者单位	1.中国科学院遥感应用研究所, 遥感信息科学开放实验室, 北京 100101, 中国; 2.中国气象局, 国家卫星气象中心, 北京 100081, 中国
推荐引用方式 GB/T 7714	延昊,王长耀,牛铮,等. 应用遥感技术估算东亚沙尘携沙量[J],2002,16(1):120-123.
APA	延昊,王长耀,牛铮,刘正军,&张晔萍.(2002).应用遥感技术估算东亚沙尘携沙量.水土保持学报,16(1),120-123.
MLA	延昊,et al."应用遥感技术估算东亚沙尘携沙量".水土保持学报 16.1(2002):120-123.