长江三角洲气温的长期变化

本文用1873—1985年上海平均气温资料研究长江三角洲气温长期变化的规律.结果表明:本地区气温长期变化曲线呈波动形式.近三十余年中出现的年,季平均气温最低值未曾低于前八十年所曾出现过的最低值,而最高值却有与以往出现过的最高值相当的.取一百十三年平均气温作基准,则由累积距平曲线可见近五十年上海气温以正距平即暖年占优势.文中还讨论了气温年波长期变化的特征.

Long-term Change of Surface Air Temperature in Yangtze Delta

Long-term Change of air temperature in the Yangtze Delta was inves-tigated by using monthly mean air temperature data of Shanghai during the years from 1873 to 1985. The results indicate that the long-term Change curves of air temperature in this area appear as Wave-like form in shape. Its minimum value of yearly or seasonly mean air temperature occurring in the last thirty years was not lower than that occurring in the previous eighty years, and the maximum value occurring in the last period was equivalent to that before. By taking 113 years' mean temperature as Standard value, it is found from cumulative departure curves that the positive departure of air temperature (i.e. warm year) dominated in the last fifty years. The long-term change of annual wave of air temperature is also discus-sed in this paper.