Abstract

Nearly 40% of the world's land is in arid and semi-arid regions, where precipitation is scarce, water resources are scarce, the ecological environment is extremely fragile and sensitive to human activities and global climate change. Under the influence of global changes, the arid trend of typical arid and semi-arid regions such as the north African continent and the Eurasian continent is very obvious, which seriously affects the local living environment, economic development, social stability and national security. Existing research results showed that in the process of modern climate change, arid and semi-arid regions were the most significant regions of global warming, as well as the earliest regions of warming. This enhancement was mainly caused by local radiation. However, with the deepening of research in recent years, the important influence of interdecadal oscillation factor (EEMD method, the decadal of different large scale signal extraction and combination) on temperature change was found, and the reason for the large-scale accelerated temperature increase and temperature decrease in the middle and high latitudes of the northern hemisphere was explained well by using it, which also provided a good explanation for the interdecadal fluctuation of enhanced temperature increase in semi-arid regions.

Presenter Profile

Prof. Guan, a doctoral supervisor in school of atmospheric science, Lanzhou University, mainly researches on land process and climate change formation mechanism in arid and semi-arid regions. She has published more than 20 SCI papers and 10 core papers in related fields, and has been a reviewer of several international journals including SCI. Rep., j. Clim., Atmos. Chem. Phys., and so on. She has successively presided over youth projects and projects under the national natural science foundation of China, and mainly participated in the national major scientific research plan of the ministry of science and technology and the integrated project of national natural science foundation of China, etc. In 2017, she won the outstanding youth project under the national natural science foundation of China.