Numerical simulation researches on orbital-scale asian climate dynamics;history and perspective

Orbital-scale Asian climate evolution is one of the hot topics of paleoclimate researches, and its changing processes and mechanisms have significant value for understanding the Asian climate change under current global warming. In recent decades, researches on orbital-scale Asian climate reconstruction, based on loess, stalagmites, lake sediments and other proxies, have achieved prominent progress and the basic framework of Asian climate evolution has been constructed. Differences between regions and proxy records suggest the complicated mechanisms of Asian climate change. As one of the important tools to explore climate dynamics, numerical simulations have been widely used and rapidly developed in the orbital-scale Asian climate studies. Based on this, this paper attempts to summarize the advances of the numerical studies on mechanisms of orbital-scale Asian climate during the past several years. The current numerical simulations have not yet given reasonable explanations to a variety of variation characteristics and regional differences in geological records, especially the difference between loess and stalagmites about the East Asian summer monsoon, and the relationship between monsoon and arid climate. Therefore, high-resolution transient experiments covering multi-orbital cycles, in combination with good dating proxies, am required in the future work to gain comprehensive understanding of the orbital-scale climate dynamics over Asia.