Mapping lake level changes using ICESat/GLAS satellite laser altimetry data: a case study in arid regions of central Asia

JunLi Li; Hui Fang; Liao Yang

doi:10.1117/12.901780

23 November 2011 Mapping lake level changes using ICESat/GLAS satellite laser altimetry data: a case study in arid regions of central Asia

JunLi Li, Hui Fang, Liao Yang

Author Affiliations +

Proceedings Volume 8006, MIPPR 2011: Remote Sensing Image Processing, Geographic Information Systems, and Other Applications; 80060J (2011) https://doi.org/10.1117/12.901780
Event: Seventh International Symposium on Multispectral Image Processing and Pattern Recognition (MIPPR2011), 2011, Guilin, China

Abstract

Lakes in arid regions of Central Asia act as essential components of regional water cycles, providing sparse but valuable water resource for the fragile ecological environments and human lives. Lakes in Central Asia are sensitive to climate change and human activities, and great changes have been found since 1960s. Mapping and monitoring these inland lakes would improve our understanding of mechanism of lake dynamics and climatic impacts. ICESat/GLAS satellite laser altimetry provides an efficient tool of continuously measuring lake levels in these poorly surveyed remote areas. An automated mapping scheme of lake level changes is developed based on GLAS altimetry products, and the spatial and temporal characteristics of 9 typical lakes in Central Asia are analyzed to validate the level accuracies. The results show that ICESat/GLAS has a good performance of lake level monitoring, whose patterns of level changes are the same as those of field observation, and the max differences between GLAS and field data is 3cm. Based on the results, it is obvious that alpine lakes are increasing greatly in lake levels during 2003-2009 due to climate change, while open lakes with dams and plain endorheic lakes decrease dramatically in water levels due to human activities, which reveals the overexploitation of water resource in Central Asia.

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JunLi Li, Hui Fang, and Liao Yang "Mapping lake level changes using ICESat/GLAS satellite laser altimetry data: a case study in arid regions of central Asia", Proc. SPIE 8006, MIPPR 2011: Remote Sensing Image Processing, Geographic Information Systems, and Other Applications, 80060J (23 November 2011); https://doi.org/10.1117/12.901780

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KEYWORDS

Climate change

Satellites

Associative arrays

Climatology

Control systems

Lithium

Clouds

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