干旱区生态环境知识资源中心

Two long-term regional climate model simulations with and without subsurface soil temperature feedbacks are performed to investigate the role of soil temperature-atmosphere coupling in influencing interannual variability of summer climate over East Asia. Results indicate that soil temperature-atmosphere coupling depends on climate regimes, mainly affecting summer climate variability over the arid/semi-arid regions. Over these areas, subsurface soil temperature feedbacks play an important role in amplifying summer surface air temperature variability, accounting for about 30-70% of total variance. The feedbacks on precipitation variability are weaker than those on surface air temperature variability over the arid/semi-arid regions, but are still significant over many areas of western part.