Determination of snow cover for the Tibetan Plateau (1983-1999) from NOAA-AVHRR LTDR

Hang Yin; Siyuan Wang; Jie Li

doi:10.1117/12.2069272

8 November 2014 Determination of snow cover for the Tibetan Plateau (1983-1999) from NOAA-AVHRR LTDR

Hang Yin, Siyuan Wang, Jie Li

Proceedings Volume 9260, Land Surface Remote Sensing II; 92600L (2014) https://doi.org/10.1117/12.2069272
Event: SPIE Asia-Pacific Remote Sensing, 2014, Beijing, China

Abstract

As one of the most active elements in nature, snow cover is an important parameter in studying climatic variations, surface radiation budget (SRB) and hydrology cycle. Complementary to ground-based station data, satellite time series provide a systematic view of snow cover over large spatial scale. Before the year 2000, only NOAA-AVHRR data provides the opportunity to analyze more than 15 years of optical satellite imagery on a high time-resolution basis. Long Term Data Record (LTDR) funded by National Aeronautics and Space Administration (NASA) offers the latest data sets with improved atmospheric correction and inter-calibration between sensors, which has not been tested in snow cover determination. Taking the Tibetan Plateau (TP) as the study area, we applied an adequate algorithm to develop long-term 8-day cloud-free snow cover products (1983-1999) using AVHRR archival reflectance products (AVH09C1) from LTDR. Here, we added the altitude and the influence of seasonal variations to the algorithm as the two additional parameters. To certain the threshold of brightness temperature(BT), we calculated the correlation between brightness temperature and the two additional parameters in supervised snow area. Then Landsat Thematic Mapper (TM) data and the meteorological station data from 1983~1999 were utilized to test the accuracy of our products. Based on these products, we carried on a preliminary analysis on seasonal distribution of snow cover during 1983~1999.

Citation Download Citation

Hang Yin, Siyuan Wang, and Jie Li "Determination of snow cover for the Tibetan Plateau (1983-1999) from NOAA-AVHRR LTDR", Proc. SPIE 9260, Land Surface Remote Sensing II, 92600L (8 November 2014); https://doi.org/10.1117/12.2069272

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KEYWORDS

Snow cover

Clouds

Environmental sensing

Meteorology

Spatial resolution

Algorithm development

Image classification

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