近年来夏季月平均日照时数在减少。
Monthly mean insolation hours have been decreasing in summer in recent years.
沉降值、降落值与此期间的平均日照时数均呈正相关。
A positive correlation existed between sedimentation value and average sunshine time in the period from heading to maturation.
洱海水面蒸发随着总云量和相对湿度的增加而减小，随着平均风速和日照时数的增大而增大。
Evaporation from Erhai Lake decreases with the increase of total cloud cover and relative humidity, and it increases with the increase of mean wind speed and sunshine duration.
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