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首页> 外文期刊>Applied optics >Downwelling spectral irradiance during evening twilight as a function of the lunar phase
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Downwelling spectral irradiance during evening twilight as a function of the lunar phase

机译：黄昏时分的下降流光谱辐照度与月相的关系

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We measured downwelling spectral vector irradiance (from 350 to 800 nm) during evening civil and nautical twilight (solar elevation down to -12 degrees). Nine sets of measurements were taken to cover the first half of the lunar cycle (from the new to full moon) and were also used to calculate chromaticity (CIE 1976 u'v'). The lunar phase had no consistent effect on downwelling irradiance until solar elevation was less than -8 degrees. For lower solar elevations, the effect of the moon increased with the fraction of the illuminated lunar disk until the fraction was approximately 50%. For fractions greater than 50%, the brightness and chromaticity of the downwelling irradiance were approximately independent of the fraction illuminated, likely because the greater brightness of a fuller moon was offset by its lower elevation during twilight. Given the importance of crepuscular periods to animal activity, including predation, reproductive cycles, and color vision in dim light, these results may have significant implications for animal ecology. (C) 2014 Optical Society of America
机译：我们在傍晚的民航和航海黄昏（太阳高度降低至-12度）期间测量了下降流的光谱矢量辐照度（从350到800 nm）。进行了九组测量以覆盖月球周期的前半部分（从新月到满月），还用于计算色度（CIE 1976 u'v'）。直到太阳仰角小于-8度，月相才对井下辐照度产生一致的影响。对于较低的太阳高度，月球的影响会随着照明的月球盘的比例的增加而增加，直到该比例约为50％。对于大于50％的分数，下降流辐照度的亮度和色度大约与所照射的分数无关，这很可能是因为满月的较高亮度被暮色期间的较低高度所抵消。考虑到关键时期对动物活动的重要性，包括捕食，生殖周期和昏暗光线下的色觉，这些结果可能对动物生态学产生重大影响。 （C）2014年美国眼镜学会

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