Abstract: The tropical mountain rainforest in Jianfengling of Hainan Island is o ne of the typical tropical forest ecosystems in China. To study the long term cl imatic dynamics in this forest area is significance in global change research . By using the meteorological data from the National Research Station of Tropica l Forest Ecosystem in Jianfengling, this paper analyzed the variation tendency o f the thermal factors in the tropical mountain rainforest area of Jianfengling i n 1980〖KG-*2〗-〖KG-*7〗2005. In this period of time, the mean annual air/groun d temperature, me an annual maximum and minimum air/ground temperature, extreme maximum and minimu m air/ground temperature, difference between ground- and air temperature, and a nnual accumulated temperature in the area all had an increasing trend, and the i ncrease of mean annual air temperature, mean annual ground temperature, differen ce between ground- and air temperature, mean annual minimum air temperature, ex treme maximum ground temperature, and extreme minimum ground temperature was mor e obvious, being 032 ℃, 059 ℃, 027 ℃, 039 ℃, 203 ℃, 162 ℃ per 10 years, respectively. The increase of minimum temperature was higher than the i ncreasing rate of maximum temperature, illustrating that the main contributor of climate warming in Jianfengling tropical mountain rainforest area was the increasing minimum temperature.

Key words: Aves, Summer, Diversity index, Wuhu City