年日照时数异常偏多出现在1963、1971年，但从未出现过异常偏少年。
The annual sunshine hours were extremely excessive in 1963 or 1971, but never extremely deficient.
指出本年度年平均气温偏高、年降水量正常略偏少，年日照时数偏少，气象灾害多，发生频繁，气候条件对农业生产有利有弊。
The temperature is a lightly higher, the precipitation is a slightly less, the sunshine time is less and calamities are frequent, which possess advantages and disadvantages to agricultural production.
年累积日照时数为2903小时。
突变分析表明，豫西烟区烤烟生育期的日照时数在1981年发生突变。
Mutation analysis showed that the saltation of sunshine durations at tobacco growth period in western Henan occurred in 1981.
年、季日照时数减少与低云量增加关系密切，而冬季日照时数的减少还与水汽压的增加有关。
Annual and seasonal sunshine hours decreased with the increasing of low level cloud amount, and the reduction of sunshine hours increased along with vapor pressure in winter.
主要研究结论如下：（1）1951-2008年，年和生长季的日照时数及日照百分率均呈减少趋势。
The main research achievements are as follows:There was a decreasing trend of the sunshine duration and sunshine percentage of year and growing season from 1951 to 2008.
主要研究结论如下：（1）1951-2008年，年和生长季的日照时数及日照百分率均呈减少趋势。
The main research achievements are as follows:There was a decreasing trend of the sunshine duration and sunshine percentage of year and growing season from 1951 to 2008.
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