干旱区生态环境知识资源中心(Arid): Detection of Yellow Sand Dust over Northeast Asia using Background Brightness Temperature Difference of Infrared Channels from MODIS

Arid

DOI	10.14191/Atmos.2012.22.2.137
	Detection of Yellow Sand Dust over Northeast Asia using Background Brightness Temperature Difference of Infrared Channels from MODIS
	Park, Jusun; Kim, Jae Hwan; Hong, Sung Jae
通讯作者	Kim, JH
来源期刊	ATMOSPHERE-KOREA
ISSN	1598-3560
EISSN	2288-3266
出版年	2012
卷号	22 期号:2 页码:137-147
英文摘要	The technique of Brightness Temperature Difference (BTD) between 11 and 12 mu m separates yellow sand dust from clouds according to the difference in absorptive characteristics between the channels. However, this method causes consistent false alarms in many cases, especially over the desert. In order to reduce these false alarms, we should eliminate the background noise originated from surface. We adopted the Background BTD (BBTD), which stands for surface characteristics on clear sky condition without any dust or cloud. We took an average of brightness temperatures of 11 and 12 mu m channels during the previous 15 days from a target date and then calculated BTD of averaged ones to obtain decontaminated pixels from dust. After defining the BBTD, we subtracted this index from BTD for the Yellow Sand Index (YSI). In the previous study, this method was already verified using the geostationary satellite, MTSAT. In this study, we applied this to the polar orbiting satellite, MODIS, to detect yellow sand dust over Northeast Asia. Products of yellow sand dust from OMI and MTSAT were used to verify MODIS YSI. The coefficient of determination between MODIS YSI and MTSAT YSI was 0.61, and MODIS YSI and OMI AI was also 0.61. As a result of comparing two products, significantly enhanced signals of dust aerosols were detected by removing the false alarms over the desert. Furthermore, the discontinuity between land and ocean on BTD was removed. This was even effective on the case of fall. This study illustrates that the proposed algorithm can provide the reliable distribution of dust aerosols over the desert even at night.
英文关键词	Yellow sand dust infrared channel BTD background BTD MODIS MTSAT
类型	Article
语种	其他
收录类别	ESCI
WOS记录号	WOS:000422566200001
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/330162
作者单位	[Park, Jusun; Kim, Jae Hwan; Hong, Sung Jae] Pusan Natl Univ, Dept Atmospher Sci, Div Earth Environm Syst, Busan 609735, South Korea
推荐引用方式 GB/T 7714	Park, Jusun,Kim, Jae Hwan,Hong, Sung Jae. Detection of Yellow Sand Dust over Northeast Asia using Background Brightness Temperature Difference of Infrared Channels from MODIS[J],2012,22(2):137-147.
APA	Park, Jusun,Kim, Jae Hwan,&Hong, Sung Jae.(2012).Detection of Yellow Sand Dust over Northeast Asia using Background Brightness Temperature Difference of Infrared Channels from MODIS.ATMOSPHERE-KOREA,22(2),137-147.
MLA	Park, Jusun,et al."Detection of Yellow Sand Dust over Northeast Asia using Background Brightness Temperature Difference of Infrared Channels from MODIS".ATMOSPHERE-KOREA 22.2(2012):137-147.