| Records |
| Author |
Li, D.; Zhao, X.; Li, X. |
| Title |
Remote sensing of human beings – a perspective from nighttime light |
Type |
Journal Article |
| Year |
2016 |
Publication |
Geo-spatial Information Science |
Abbreviated Journal |
Geo-spatial Information Science |
| Volume |
19 |
Issue |
1 |
Pages |
69-79 |
| Keywords |
Remote Sensing |
| Abstract |
City lights, fishing boats, and oil fields are the major sources of nighttime lights, therefore the nighttime light images provide a unique source to map human beings and their activities from outer space. While most of the scholars focused on application of nighttime light remote sensing in urbanization and regional development, the actual fields are much wider. This paper summarized the applications of nighttime light remote sensing into fields such as the estimation of socioeconomic parameters, monitoring urbanization, evaluation of important events, analyzing light pollution, fishery, etc. For estimation of socioeconomic parameters, the most promising progress is that Gross Domestic Product and its growth rate have been estimated with statistical data and nighttime light data using econometric models. For monitoring urbanization, urban area and its dynamics can be extracted using different classification methods, and spatial analysis has been employed to map urban agglomeration. As sharp changes of nighttime light are associated with important socioeconomic events, the images have been used to evaluate humanitarian disasters, especially in the current Syrian and Iraqi wars. Light pollution is another hotspot of nighttime light application, as the night light is related to some diseases and abnormal behavior of animals, and the nighttime light images can provide light pollution information on large scales so that it is much easier to analyze the effects of light pollutions. In each field, we listed typical cases of the applications. At last, future studies of nighttime light remote sensing have been predicted. |
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| ISSN |
1009-5020 |
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no |
| Call Number |
GFZ @ kyba @ |
Serial  |
1878 |
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| Author |
Polivka, T.N.; Wang, J.; Ellison, L.T.; Hyer, E.J.; Ichoku, C.M. |
| Title |
Improving Nocturnal Fire Detection With the VIIRS Day-Night Band |
Type |
Journal Article |
| Year |
2016 |
Publication |
IEEE Transactions on Geoscience and Remote Sensing |
Abbreviated Journal |
IEEE Trans. Geosci. Remote Sensing |
| Volume |
54 |
Issue |
9 |
Pages |
5503-5519 |
| Keywords |
Remote Sensing |
| Abstract |
Building on existing techniques for satellite remote sensing of fires, this paper takes advantage of the day-night band (DNB) aboard the Visible Infrared Imaging Radiometer Suite (VIIRS) to develop the Firelight Detection Algorithm (FILDA), which characterizes fire pixels based on both visible-light and infrared (IR) signatures at night. By adjusting fire pixel selection criteria to include visible-light signatures, FILDA allows for significantly improved detection of pixels with smaller and/or cooler subpixel hotspots than the operational Interface Data Processing System (IDPS) algorithm. VIIRS scenes with near-coincident Advanced Spaceborne Thermal Emission and Reflection (ASTER) overpasses are examined after applying the operational VIIRS fire product algorithm and including a modified “candidate fire pixel selection†approach from FILDA that lowers the 4-μm brightness temperature (BT) threshold but includes a minimum DNB radiance. FILDA is shown to be effective in detecting gas flares and characterizing fire lines during large forest fires (such as the Rim Fire in California and High Park fire in Colorado). Compared with the operational VIIRS fire algorithm for the study period, FILDA shows a large increase (up to 90%) in the number of detected fire pixels that can be verified with the finer resolution ASTER data (90 m). Part (30%) of this increase is likely due to a combined use of DNB and lower 4-μm BT thresholds for fire detection in FILDA. Although further studies are needed, quantitative use of the DNB to improve fire detection could lead to reduced response times to wildfires and better estimate of fire characteristics (smoldering and flaming) at night. |
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Edition |
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| ISSN |
0196-2892 |
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no |
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LoNNe @ kyba @ |
Serial |
1781 |
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| Author |
Blair, A. |
| Title |
Sark in the Dark: Wellbeing and Community on the Dark Sky Island of Sark |
Type |
Book Whole |
| Year |
2016 |
Publication |
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Issue |
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Pages |
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| Keywords |
Society; ecopsychology; environmental psychology; psychology |
| Abstract |
Studies of the beneficial and transformative qualities of encounters with nature typically focus on ‘green’ or grounded nature. In 'Sark in the Dark', Ada Blair shifts this focus upwards to a refreshing encounter with the richness of the dark night sky. In this book, she documents the research she conducted while at the University of Wales Trinity Saint David into the culture and history of the world’s first designated Dark Sky Island. Through a series of interviews with Sark residents, as well as poignant self-reflections, Blair explores the importance of the dark sky on human wellbeing and community. |
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caladach(at)gmail.com |
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Sophia Centre Press |
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English |
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English |
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Sophia Centre Master Monographs |
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978-1-907767-42-5 |
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Print |
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no |
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IDA @ john @ |
Serial |
1780 |
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| Author |
Barentine, J.C. |
| Title |
Going for the Gold : Quantifying and Ranking Visual Night Sky Quality in International Dark Sky Places |
Type |
Journal Article |
| Year |
2016 |
Publication |
International Journal of Sustainable Lighting |
Abbreviated Journal |
IJSL |
| Volume |
18 |
Issue |
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Pages |
9-15 |
| Keywords |
Society; conservation; dark sky places; dark sky; National parks; dark sky parks; national parks; Luminescent Measurements; Night sky brightness |
| Abstract |
Since the invention of electric lighting in the nineteenth century, the steadily increasing use of artificial light at night in outdoor spaces has grown to threaten the integrity of dark night skies and nocturnal terrestrial spaces. The conservation community has gradually come to accept the need to protect natural nighttime darkness, which finds expression in dark sky parks and similar protected areas. As these places begin to reap tangible economic benefits in the form of sustainable ‘astrotourism,’ the movement to actively protect them gains strength. The International Dark-Sky Association designates Dark Sky Parks and Reserves under a comparative ranking scheme that assigns night sky quality tiers according to a combination of objective and subjective characteristics, but shortcomings in the consistency of these ratings exist that undermine the consistency and reputation of the designation program. Here we consider potential changes to the qualification regime to make the ratings system more robust for the benefit of future designations. |
| Address |
3323 N 1st Ave, Tucson, AZ, 85719 USA; john(at)darksky.org |
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International Journal of Sustainable Lighting |
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English |
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English |
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2586-1247 |
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no |
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IDA @ john @ |
Serial |
1779 |
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| Author |
Akacem, L.D.; Wright, K.P.J.; LeBourgeois, M.K. |
| Title |
Bedtime and evening light exposure influence circadian timing in preschool-age children: A field study |
Type |
Journal Article |
| Year |
2016 |
Publication |
Neurobiology of Sleep and Circadian Rhythms |
Abbreviated Journal |
Neurobiol Sleep Circadian Rhythms |
| Volume |
1 |
Issue |
2 |
Pages |
27-31 |
| Keywords |
Human Health |
| Abstract |
Light exposure and sleep timing are two factors that influence inter-individual variability in the timing of the human circadian clock. The aim of this study was to quantify the degree to which evening light exposure predicts variance in circadian timing over and above bedtime alone in preschool children. Participants were 21 children ages 4.5-5.0 years (4.7 +/- 0.2 years; 9 females). Children followed their typical sleep schedules for 4 days during which time they wore a wrist actigraph to assess sleep timing and a pendant light meter to measure minute-by-minute illuminance levels in lux. On the 5th day, children participated in an in-home dim-light melatonin onset (DLMO) assessment. Light exposure in the 2 h before bedtime was averaged and aggregated across the 4 nights preceding the DLMO assessment. Mean DLMO and bedtime were 19:22 +/- 01:04 and 20:07 +/- 00:46, respectively. Average evening light exposure was 710.1 +/- 1418.2 lux. Children with later bedtimes (lights-off time) had more delayed melatonin onset times (r=0.61, p=0.002). Evening light exposure was not independently associated with DLMO (r=0.32, p=0.08); however, a partial correlation between evening light exposure and DLMO when controlling for bedtime yielded a positive correlation (r=0.46, p=0.02). Bedtime explained 37.3% of the variance in the timing of DLMO, and evening light exposure accounted for an additional 13.3% of the variance. These findings represent an important step in understanding factors that influence circadian phase in preschool-age children and have implications for understanding a modifiable pathway that may underlie late sleep timing and the development of evening settling problems in early childhood. |
| Address |
Sleep and Development Laboratory, Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, USA |
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English |
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2451-9944 |
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PMID:28042611; PMCID:PMC5193478 |
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no |
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LoNNe @ kyba @ |
Serial |
1755 |
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