| Records |
| Author |
Chellappa, S.L.; Steiner, R.; Oelhafen, P.; Lang, D.; Gotz, T.; Krebs, J.; Cajochen, C. |
Title  |
Acute exposure to evening blue-enriched light impacts on human sleep |
Type |
Journal Article |
| Year |
2013 |
Publication |
Journal of Sleep Research |
Abbreviated Journal |
J Sleep Res |
| Volume |
22 |
Issue |
5 |
Pages |
573-580 |
| Keywords |
Human Health |
| Abstract |
Light in the short wavelength range (blue light: 446-483 nm) elicits direct effects on human melatonin secretion, alertness and cognitive performance via non-image-forming photoreceptors. However, the impact of blue-enriched polychromatic light on human sleep architecture and sleep electroencephalographic activity remains fairly unknown. In this study we investigated sleep structure and sleep electroencephalographic characteristics of 30 healthy young participants (16 men, 14 women; age range 20-31 years) following 2 h of evening light exposure to polychromatic light at 6500 K, 2500 K and 3000 K. Sleep structure across the first three non-rapid eye movement non-rapid eye movement – rapid eye movement sleep cycles did not differ significantly with respect to the light conditions. All-night non-rapid eye movement sleep electroencephalographic power density indicated that exposure to light at 6500 K resulted in a tendency for less frontal non-rapid eye movement electroencephalographic power density, compared to light at 2500 K and 3000 K. The dynamics of non-rapid eye movement electroencephalographic slow wave activity (2.0-4.0 Hz), a functional index of homeostatic sleep pressure, were such that slow wave activity was reduced significantly during the first sleep cycle after light at 6500 K compared to light at 2500 K and 3000 K, particularly in the frontal derivation. Our data suggest that exposure to blue-enriched polychromatic light at relatively low room light levels impacts upon homeostatic sleep regulation, as indexed by reduction in frontal slow wave activity during the first non-rapid eye movement episode. |
| Address |
Centre for Chronobiology, Psychiatric Hospital of the University of Basel, Basel, Switzerland; Cyclotron Research Center, University of Liege, Liege, Belgium |
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English |
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| ISSN |
0962-1105 |
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| Notes |
PMID:23509952 |
Approved |
no |
| Call Number |
GFZ @ kyba @ |
Serial |
2201 |
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| Author |
Solbrig, J.E.; Lee, T.E.; Miller, S.D. |
| Title |
Advances in Remote Sensing: Imaging the Earth by Moonlight |
Type |
Journal Article |
| Year |
2013 |
Publication |
Eos, Transactions American Geophysical Union |
Abbreviated Journal |
Eos Trans. AGU |
| Volume |
94 |
Issue |
40 |
Pages |
349-350 |
| Keywords |
Remote Sensing; night; visible; VIIRS |
| Abstract |
Earth's nighttime environment is being revealed in unprecedented detail by the new satellite-mounted Visible/Infrared Imaging Radiometer Suite (VIIRS). VIIRS' Day/Night Band (DNB) is a highly sensitive broadband visible channel capable of detecting light from cities and other terrestrial emission sources. |
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0096-3941 |
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no |
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LoNNe @ christopher.kyba @ |
Serial |
486 |
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| Author |
Stevens, R.G.; Brainard, G.C.; Blask, D.E.; Lockley, S.W.; Motta, M.E. |
| Title |
Adverse health effects of nighttime lighting: comments on American Medical Association policy statement |
Type |
Journal Article |
| Year |
2013 |
Publication |
American Journal of Preventive Medicine |
Abbreviated Journal |
Am J Prev Med |
| Volume |
45 |
Issue |
3 |
Pages |
343-346 |
| Keywords |
American Medical Association; Cell Cycle/physiology; Circadian Rhythm/*physiology; DNA Damage/physiology; *Health Policy; Humans; Lighting/*adverse effects; United States |
| Abstract |
The American Medical Association House of Delegates in June of 2012 adopted a policy statement on nighttime lighting and human health. This major policy statement summarizes the scientific evidence that nighttime electric light can disrupt circadian rhythms in humans and documents the rapidly advancing understanding from basic science of how disruption of circadian rhythmicity affects aspects of physiology with direct links to human health, such as cell cycle regulation, DNA damage response, and metabolism. The human evidence is also accumulating, with the strongest epidemiologic support for a link of circadian disruption from light at night to breast cancer. There are practical implications of the basic and epidemiologic science in the form of advancing lighting technologies that better accommodate human circadian rhythmicity. |
| Address |
University of Connecticut Health Center, Farmington, Connecticut 06030-6325, USA. bugs@uchc.edu |
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English |
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0749-3797 |
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| Notes |
PMID:23953362 |
Approved |
no |
| Call Number |
IDA @ john @ |
Serial |
130 |
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| Author |
Grant, R.; Halliday, T.; Chadwick, E. |
| Title |
Amphibians' response to the lunar synodic cycle--a review of current knowledge, recommendations, and implications for conservation |
Type |
Journal Article |
| Year |
2013 |
Publication |
Behavioral Ecology |
Abbreviated Journal |
Behavioral Ecology |
| Volume |
24 |
Issue |
1 |
Pages |
53-62 |
| Keywords |
amphibians; circular statistics; light; lunar cycle; moon phase; predator avoidance; reproductive synchronization; moonlight |
| Abstract |
The way in which amphibians respond to the geophysical changes brought about by the lunar synodic cycle is a neglected area of their ecology, but one which has recently generated interest. Knowledge of how amphibians respond to lunar phase is of intrinsic interest and also may be important for conservation and monitoring of populations. We surveyed the literature on amphibians’ responses to the lunar cycle and found 79 examples where moon phase in relation to amphibian behavior and ecology had been studied, across diverse amphibian taxa. Of the examples reviewed, most of them show some type of response to lunar phase, with only a few species being unaffected. We found that there is no significant difference between the numbers of species which increase, and those that decrease activity or reproductive behavior (including calling) during a full moon. The responses to the lunar cycle can not be generalized across taxonomic group, but instead are highly species specific and relate directly to the species’ ecology. The primary reasons for changes in amphibian behavior in response to the lunar cycle appear to be temporal synchronization of breeding and predator avoidance. Responses to changes in prey availability, facilitation of visual signalling and use of lunar cues in navigation and homing are less prevalent but merit further investigation. Comparisons between studies are hampered by differences in field and analytical methods; we therefore make a number of recommendations for future collection and analysis of data related to lunar phase. |
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1045-2249 |
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no |
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IDA @ john @ |
Serial |
81 |
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| Author |
Jones, A.; Noll, S.; Kausch, W.; Szyszka, C.; Kimeswenger, S. |
| Title |
An advanced scattered moonlight model for Cerro Paranal |
Type |
Journal Article |
| Year |
2013 |
Publication |
Astronomy & Astrophysics |
Abbreviated Journal |
A&A |
| Volume |
560 |
Issue |
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Pages |
A91 |
| Keywords |
Moonlight |
| Abstract |
The largest natural source of light at night is the Moon, and it is the major contributor to the astronomical sky background. Being able to accurately predict the sky background, including scattered moonlight is important for scheduling astronomical observations. We have developed an improved scattered moonlight model, in which the components are computed with a better physical understanding as opposed to the simple empirical fit in the frequently used photometric model of Krisciunas & Schaefer (1991, PASP, 103, 1033). Our spectroscopic model can better trace the spectral trends of scattered moonlight for any position of the Moon and target observation. This is the first scattered moonlight model that we know of which is this physical and versatile. We have incorporated an observed solar spectrum, accurate lunar albedo fit, and elaborate scattering and absorption calculations that include scattering off of molecules and aerosols. It was designed for Cerro Paranal, but can be modified for any location with known atmospheric properties. Throughout the optical range, the uncertainty is less than 20%. This advanced scattered moonlight model can predict the amount of scattered moonlight for any given geometry of the Moon and target, and lunar phase for the entire optical spectrum. |
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0004-6361 |
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no |
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LoNNe @ kyba @ |
Serial |
1461 |
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