Abstract:

In order to find out the positive and negtive influence of climate changing pattern on agricultural production, the author focused on analyzing the yearly variation of precipitation, temperature and sunlight in past 50 years by applying linear and standard deviation statistical tools. The results demonstrated that the average temperature in Puyang showed an upward trend in past 55 years of the four seasons, winter showed the most notable increase, followed by spring and autumn, while the average temperature in summer tended to go down. Moreover, daily sunlight showed a downward trend generally. The hours of sunlight per year decreased at a speed of 135 h every decade. Lastly, yearly precipitation was 599.8 mm, and anomaly percentage of which was -56%-75%, showing a big variation of yearly precipitation that could easily cause drought and flood. The reasons of climate change could be summarized as follows: firstly, human activities drove climate warmer; secondly, the heavier and heavier air pollution and climate changes led to decrease of sunlight; lastly, the precipitation showed an overall downward trend and periodic changes.