商丘近40a蒸发量变化特征及原因分析

Research on the Variation Characteristics and Causes of Evaporation Capacity of Shangqiu in Recent 40 Years

利用商丘1961-2000年小型蒸发皿蒸发量资料,分析了商丘蒸发量的变化趋势及引起蒸发量变化的因子,结果表明,商丘年、季和月蒸发量均存在明显的下降趋势,影响蒸发量变化的因子主要有风速、日照、相对湿度、水汽压等。

Based on the evaporation capacity data of Shangqiu weather station from 1961 to 2000, the variation tendency and impact factors of the evaporation capacity were analyzed. The results showed the annual, seasonal and monthly evaporation capacity variation had the obvious downtrend in recent 40 years. The main impact factors were the wind speed, the sunlight radiation, the relative humidity and the water vapor pressure.