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Dynamic changes in lakes in the Hoh Xil region before and after the 2011 outburst of Zonag Lake

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Abstract

Zonag, Kusai, Hedin Noel and Yanhu Lakes are independent inland lakes in the Hoh Xil region on the Qinghai-Tibet Plateau. In September 2011, Zonag Lake burst after the water level had increased for many years. Floods flowed through Kusai and Hedin Noel Lakes into Yanhu Lake; since then, the four small endorheic catchments merged into one larger catchment. This hydrological process caused the rapid shrinkage of Zonag Lake and continuous expansion of Yanhu Lake. In this study, based on satellite images, meteorological data and field investigations, we examined the dynamic changes in the four lakes and analyzed the influencing factors. The results showed that before 2011, the trends in the four lake areas were similar and displayed several stages. The change in the area of Zonag Lake corresponded well to the change in annual precipitation (AP), but the magnitude of the change was less than that of a non-glacier-fed lake. Although increased precipitation was the dominant factor that caused Zonag Lake to expand, increased glacier melting and permafrost thawing due to climate warming also had significant effects. After the 2011 outburst of Zonag Lake, due to the increasing AP and accelerating glacier melting, the increases in water volume of the three lakes were absorbed by Yanhu Lake, and Yanhu Lake expanded considerably. According to the rapid growth rates in water level and lake area, Yanhu Lake is likely to burst in 1–2 years.

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Acknowledgments

This study was supported by the Science and Technology Project of Ecological Civilization Construction of Beautiful China (No. XDA23060703); the Hundred Talents Program of the Chinese Academy of Sciences (No. 51Y551831); the National Natural Science Foundation of China (No. 41671068, 41571075); and the State Key Laboratory of Cryosphere Sciences (No. SKLCS-ZZ-2019).

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Correspondence to Chang-wei Xie.

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Liu, Wh., Xie, Cw., Zhao, L. et al. Dynamic changes in lakes in the Hoh Xil region before and after the 2011 outburst of Zonag Lake. J. Mt. Sci. 16, 1098–1110 (2019). https://doi.org/10.1007/s11629-018-5085-0

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  • DOI: https://doi.org/10.1007/s11629-018-5085-0

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