A MODEL COMPARISON FOR DAYLENGTH AS A FUNCTION OF LATITUDE AND DAY OF YEAR
A MODEL COMPARISON FOR DAYLENGTH AS A FUNCTION OF LATITUDE AND DAY OF YEAR
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DOI：
10.1016/0304-3800(94)00034-f
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发表时间：
1995-06-01
影响因子：
3.1
通讯作者：
SCHOOLFIELD, RM
中科院分区：
文献类型：
--
作者：
FORSYTHE, WC;RYKIEL, EJ;SCHOOLFIELD, RM
一个模型，计算一天的长度为一个平面为一个给定的纬度和一年中的一天。 计算出的日长与史密森气象表和天文年历中公布的北纬40度和南纬40度之间的数值相差不到1分钟，在北纬60度处最大误差为7分钟。 该模型允许使用不同的定义的日出/日落和纳入黄昏。 与其他日长模型的比较表明，该模型是更准确的，在生长季节的过程中，长达一周的日光累积小时数的变化可以占如何定义日出/日落。
A model that calculates the length of the day for a flat surface for a given latitude and day of the year is described. Calculated daylengths are within 1 minute of values published in Smithsonian Meteorological Tables and the Astronomical Almanac for latitudes between 40-degrees North and South with a maximum error of 7 minutes occurring at 60-degrees latitude. The model allows the use of different definitions of sunrise/sunset and the incorporation of twilight. Comparisons with other daylength models indicate that this model is more accurate and that variation in accumulated hours of daylight of up to one week over the course of the growing season can be accounted for by how sunrise/sunset are defined.