Abstract

In recent years, the phenomenon of Arctic amplification (AA) has been widely concerned by the international academic community.Along the potential driving mechanism of the phenomenon of Arctic amplification, the academic community has carried out a lot of research work based on mode simulation and satellite observation, and put forward a series of theories and evidences.On the one hand, the understanding of the rapid heating mechanism in the Arctic is deepening; on the other hand, the differences between studies are still very large and there are even contradictions.Based on the review of relevant theoretical mechanisms and their existing problems, this report will present evidence based on long-term time series data from remote sensing observations:The increase of atmospheric long-wave radiation caused by the abnormal increase of atmospheric cloud and water vapor is the key factor for the rapid increase of atmospheric temperature in the Arctic winter and spring.It is also pointed out that the near-surface warming caused by the enhanced atmospheric greenhouse effect in the Arctic winter and spring will suppress the re-freezing process of winter sea ice and accelerate the initial melting process of spring sea ice, which lead to the early melting season of the Arctic sea ice in mid-May, then triggering the radiation feedback process of sea ice albedo and eventually accelerating the melting of Arctic sea ice in summer.

Presenter Profile

Cao Yunfeng graduated from Beijing Normal University in 2016 with a Ph.D. in Cartography and Geographic Information Systems. From 2013 to 2015, he received jointly supervision at University of Maryland.His main research interests are the radiation budget of the gas system and the climate change of the cryosphere. He presided over projects such as the National Natural Science Foundation (Youth), the National Key Laboratory of Remote Sensing Science, and other projects, and participated in special research projects including Global Change and Response and Marine Environmental Safety Guarantee. He has published more than 10 academic papers in domestic and foreign journals such as Journal of Climate, Scientific Reports, and Science Bulletin.