| Records |
| Author |
Elvidge, C.D.; Baugh, K.; Zhizhin, M.; Hsu, F.C.; Ghosh, T. |
| Title |
VIIRS night-time lights |
Type |
Journal Article |
| Year |
2017 |
Publication |
International Journal of Remote Sensing |
Abbreviated Journal |
International Journal of Remote Sensing |
| Volume |
38 |
Issue |
21 |
Pages  |
5860-5879 |
| Keywords |
Remote Sensing |
| Abstract |
The Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) collects global low-light imaging data that have significant improvements over comparable data collected for 40 years by the DMSP Operational Linescan System. One of the prominent features of DNB data is the detection of electric lighting present on the Earth’s surface. Most of these lights are from human settlements. VIIRS collects source data that could be used to generate monthly and annual science grade global radiance maps of human settlements with electric lighting. There are a substantial number of steps involved in producing a product that has been cleaned to exclude background noise, solar and lunar contamination, data degraded by cloud cover, and features unrelated to electric lighting (e.g. fires, flares, volcanoes). This article describes the algorithms developed for the production of high-quality global VIIRS night-time lights. There is a broad base of science users for VIIRS night-time lights products, ranging from land-use scientists, urban geographers, ecologists, carbon modellers, astronomers, demographers, economists, and social scientists. |
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0143-1161 |
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LoNNe @ kyba @ |
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1750 |
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| Author |
Li, X.; Elvidge, C.; Zhou, Y.; Cao, C.; Warner, T. |
| Title |
Remote sensing of night-time light |
Type |
Journal Article |
| Year |
2017 |
Publication |
International Journal of Remote Sensing |
Abbreviated Journal |
International Journal of Remote Sensing |
| Volume |
38 |
Issue |
21 |
Pages |
5855-5859 |
| Keywords |
Remote Sensing; Commentary |
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0143-1161 |
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GFZ @ kyba @ |
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1872 |
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Anderson, S.J.; Tuttle, B.T.; Powell, R.L.; Sutton, P.C. |
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Characterizing relationships between population density and nighttime imagery for Denver, Colorado: issues of scale and representation |
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Journal Article |
| Year |
2010 |
Publication |
International Journal of Remote Sensing |
Abbreviated Journal |
International Journal of Remote Sensing |
| Volume |
31 |
Issue |
21 |
Pages |
5733-5746 |
| Keywords |
Remote Sensing |
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0143-1161 |
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LoNNe @ kagoburian @ |
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702 |
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Willmott, N.J.; Henneken, J.; Selleck, C.J.; Jones, T.M. |
| Title |
Artificial light at night alters life history in a nocturnal orb-web spider |
Type |
Journal Article |
| Year |
2018 |
Publication |
PeerJ |
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| Volume |
6 |
Issue |
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Pages |
e5599 |
| Keywords |
Animals |
| Abstract |
The prevalence of artificial light at night (ALAN) is increasing rapidly around the world. The potential physiological costs of this night lighting are often evident in life history shifts. We investigated the effects of chronic night-time exposure to ecologically relevant levels of LED lighting on the life history traits of the nocturnal Australian garden orb-web spider (Eriophora biapicata). We reared spiders under a 12-h day and either a 12-h natural darkness (∼0 lux) or a 12-h dim light (∼20 lux) night and assessed juvenile development, growth and mortality, and adult reproductive success and survival. We found that exposure to ALAN accelerated juvenile development, resulting in spiders progressing through fewer moults, and maturing earlier and at a smaller size. There was a significant increase in daily juvenile mortality for spiders reared under 20 lux, but the earlier maturation resulted in a comparable number of 0 lux and 20 lux spiders reaching maturity. Exposure to ALAN also considerably reduced the number of eggs produced by females, and this was largely associated with ALAN-induced reductions in body size. Despite previous observations of increased fitness for some orb-web spiders in urban areas and near night lighting, it appears that exposure to artificial night lighting may lead to considerable developmental costs. Future research will need to consider the detrimental effects of ALAN combined with foraging benefits when studying nocturnal insectivores that forage around artificial lights. |
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2167-8359 |
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no |
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GFZ @ kyba @ |
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2023 |
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| Author |
Revell, V.L.; Molina, T.A.; Eastman, C.I. |
| Title |
Human phase response curve to intermittent blue light using a commercially available device |
Type |
Journal Article |
| Year |
2012 |
Publication |
The Journal of Physiology |
Abbreviated Journal |
J Physiol |
| Volume |
590 |
Issue |
Pt 19 |
Pages |
4859-4868 |
| Keywords |
Adolescent; Adult; Circadian Clocks/physiology/*radiation effects; Female; Humans; *Light; Male; Melatonin/analysis/physiology; Saliva/chemistry; Young Adult; blue light |
| Abstract |
Light shifts the timing of the circadian clock according to a phase response curve (PRC). To date, all human light PRCs have been to long durations of bright white light. However, melanopsin, the primary photopigment for the circadian system, is most sensitive to short wavelength blue light. Therefore, to optimise light treatment it is important to generate a blue light PRC.We used a small, commercially available blue LED light box, screen size 11.2 x 6.6 cm at approximately 50 cm, approximately 200 muW cm(-2), approximately 185 lux. Subjects participated in two 5 day laboratory sessions 1 week apart. Each session consisted of circadian phase assessments to obtain melatonin profiles before and after 3 days of free-running through an ultradian light-dark cycle (2.5 h wake in dim light, 1.5 h sleep in the dark), forced desynchrony protocol. During one session subjects received intermittent blue light (three 30 min pulses over 2 h) once a day for the 3 days of free-running, and in the other session (control) they remained in dim room light, counterbalanced. The time of blue light was varied among subjects to cover the entire 24 h day. For each individual, the phase shift to blue light was corrected for the free-run determined during the control session. The blue light PRC had a broad advance region starting in the morning and extending through the afternoon. The delay region started a few hours before bedtime and extended through the night. This is the first PRC to be constructed to blue light and to a stimulus that could be used in the real world. |
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University of Surrey, Guildford, Surrey GU2 7XH, UK |
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English |
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0022-3751 |
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PMID:22753544; PMCID:PMC3487041 |
Approved |
no |
| Call Number |
IDA @ john @ |
Serial |
345 |
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