A model comparison for daylength as a function of latitude and day of year

Autor:	William C. Forsythe, Hsin-I Wu, Edward J. Rykiel, Robert M. Schoolfield, Randal S. Stahl
Rok vydání:	1995
Předmět:	Twilight Ecological Modeling Sunrise Growing season Environmental science Daylight Sunset Variation (astronomy) Atmospheric sciences Astronomical Almanac Latitude
Zdroj:	Ecological Modelling. 80:87-95
ISSN:	0304-3800
DOI:	10.1016/0304-3800(94)00034-f
Popis:	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 ° North and South with a maximum error of 7 minutes occurring at 60 ° 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b767fcbf670772a6d0f2959a2d909fd7 https://doi.org/10.1016/0304-3800(94)00034-f Zobrazit plný text záznamu Full Text from ScienceDirect