Acknowledgments
This work was supported equally by the Strategic Priority Research
Program of the Chinese Academy of Sciences (XDB31000000), the Second
Tibetan Plateau Scientific Expedition and Research (STEP) program
(2019QZKK0502), the National Natural Science Foundation of China (grant
numbers 31590821 and 91731301), National Key Research and Development
Program of China (2017YFC0505203), and, the Fundamental Research Funds
for the Central Universities (Grant No. lzujbky- 2019), and
International Collaboration 111 Programme (BP0719040). We received
support for computational work from the Big Data Computing Platform for
Western Ecological Environment and Regional Development and
Supercomputing Center of Lanzhou University.