Analysis of the climate change trend in Nanjing from 1951 to 2020

Climate is very important human life and direct effect on the Whole world’s behaviors. From 1951 to 2020, I studied the trend of climate change in Nanjing, China. Temperature, precipitation, sunlight hour, and relative humidity are the analyzed factors. This study's content is mainly based on a trend analysis of climate change. The analysis is carried out in two directions. One of the most important aspects of the research is the annual climate change trend in Nanjing from 1951 to 2020. The key focus areas are the annual average temperature trend, the annual maximum temperature trend, the annual minimum temperature trend, the annual relative humidity trend, and the annual sunshine hour trend. The seasonal climate change trend in Nanjing from 1951 to 2020 is another research path. It attempted to demonstrate the significance of climate change by analyzing from 1951 to 2020 climate change data by using the XLSTAT software. Annual and seasonal climate factors were analyzed using Mann-Kendall (MK) trend test. Annual average temperature, average maximum temperature, and average minimum temperature trends increased and all the seasons (autumn, spring, summer, and winter) increased trend. The average annual relative humidity and all the seasonal graphs were the negative trends that mean relative humidity was decreased within the study period. The total annual precipitation trend was decreasing too. But when seasonal total precipitation autumn, summer, and winter were increased trend but the spring was decrease trend. Not only precipitation but also annual total sunshine hour was decrease trend. All seasons of the sunshine hour was decrease trend.