关键词: 气候变化, 极端气候, 赣江流域, 年最高气温, 年最大日降雨量

Abstract: Extreme weather events have huge impact on human and the environment. In this article, Mann-Kendall test and linear trend method were adopted to examine the trend of eight indicators according to temperature and precipitation data in south Jiangxi Province from 1956 to 2013. The indicators include average value of daily maximum temperature difference (MxT), average value of daily minimum temperature (MnT), average value of daily temperature difference (△T), total precipitation (P), annual maximum 1-day rainfall (AM1R), annual maximum 3-day rainfall (AM3R), annual maximum 5-day rainfall (AM5R), and annual maximum 7-day rainfall (AM7R). Results showed that 1) there was no significant change in annual precipitation index, but the seasonal variations were obvious; 2) temperature indicators showed the same trend both in year scale and in season scale, and in almost all the sites MxT and MnT showed significant upward trend, in particular, MnT in autumn had the largest increase of 0.39 ℃ per decade. △T decreased except in spring; 3) extreme precipitation events showed an upward trend, and AM1R and AM3R increased significantly, especially in winter. The research results suggest that the temperature trend in Southern Jiangxi is in accordance with global warming trend, and extreme precipitation events are intensifying.

Key words: climate change, extreme climate, Ganjiang River Basin, maximum annual temperature, maximum annual daily rainfall