| Records |
| Author |
Zhao,; Zhou,; Li,; Cao,; He,; Yu,; Li,; Elvidge,; Cheng,; Zhou, |
| Title |
Applications of Satellite Remote Sensing of Nighttime Light Observations: Advances, Challenges, and Perspectives |
Type |
Journal Article |
| Year |
2019 |
Publication |
Remote Sensing |
Abbreviated Journal |
Remote Sensing |
| Volume |
11 |
Issue |
17 |
Pages |
1971 |
| Keywords |
Review; Remote Sensing |
| Abstract |
Nighttime light observations from remote sensing provide us with a timely and spatially explicit measure of human activities, and therefore enable a host of applications such as tracking urbanization and socioeconomic dynamics, evaluating armed conflicts and disasters, investigating fisheries, assessing greenhouse gas emissions and energy use, and analyzing light pollution and health effects. The new and improved sensors, algorithms, and products for nighttime lights, in association with other Earth observations and ancillary data (e.g., geo-located big data), together offer great potential for a deep understanding of human activities and related environmental consequences in a changing world. This paper reviews the advances of nighttime light sensors and products and examines the contributions of nighttime light remote sensing to perceiving the changing world from two aspects (i.e., human activities and environmental changes). Based on the historical review of the advances in nighttime light remote sensing, we summarize the challenges in current nighttime light remote sensing research and propose four strategic directions, including: Improving nighttime light data; developing a long time series of consistent nighttime light data; integrating nighttime light observations with other data and knowledge; and promoting multidisciplinary and interdisciplinary analyses of nighttime light observations. |
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2072-4292 |
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GFZ @ kyba @ |
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2677 |
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| Author |
Verra, D.M.; Sajdak, B.S.; Merriman, D.K.; Hicks, D. |
| Title |
Diurnal rodents as pertinent animal models of human retinal physiology and pathology |
Type |
Journal Article |
| Year |
2019 |
Publication |
Progress in Retinal and eye Research |
Abbreviated Journal |
Prog Retin Eye Res |
| Volume |
in press |
Issue |
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Pages |
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| Keywords |
Animals; Vision |
| Abstract |
This presentation will survey the retinal architecture, advantages, and limitations of several lesser-known rodent species that provide a useful diurnal complement to rats and mice. These diurnal rodents also possess unusually cone-rich photoreceptor mosaics that facilitate the study of cone cells and pathways. Species to be presented include principally the Sudanian Unstriped Grass Rat and Nile Rat (Arvicanthis spp.), the Fat Sand Rat (Psammomys obesus), the degu (Octodon degus) and the 13-lined ground squirrel (Ictidomys tridecemlineatus). The retina and optic nerve in several of these species demonstrate unusual resilience in the face of neuronal injury, itself an interesting phenomenon with potential translational value. |
| Address |
Department of Neurobiology of Rhythms, Institut des Neurosciences Cellulaires et Integratives (INCI), CNRS UPR 3212, Strasbourg, France. Electronic address: photoreceptor67@hotmail.com |
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English |
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1350-9462 |
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PMID:31499165 |
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GFZ @ kyba @ |
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2676 |
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| Author |
Wallner, S.; Kocifaj, M. |
| Title |
Impacts of surface albedo variations on the night sky brightness – A numerical and experimental analysis |
Type |
Journal Article |
| Year |
2019 |
Publication |
Journal of Quantitative Spectroscopy and Radiative Transfer |
Abbreviated Journal |
Journal of Quantitative Spectroscopy and Radiative Transfer |
| Volume |
in press |
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Pages |
in press |
| Keywords |
Skyglow |
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The aim of this paper is to analyze surface albedo impacts on artificial night sky brightness at zenith. The way in which these parameters correlate with each other is analyzed numerically and then experimentally by Sky Quality Meters (SQMs) in the city of Linz, Austria between 2016 and 2018. Three SQMs are located in city areas that differ in ground type, while other two are installed outside but near the city. To eliminate systematic errors of different SQMs or a missing inter-calibration of all devices, we examine relative change in zenithal brightness instead of its absolute values. However, the ground albedo not only depends on the ground type, but also shows seasonal variation most often driven by vegetation and environmental change. To understand these changes, we use SkyGlow simulator to perform numerical experiments on four different albedo models. The results have proven that seasonal variations are clearly visible as green city parts become darker around autumn and ratios to urban located SQMs increase. We show that there is a major difference in simulation results if either conducting city parts with various surface albedos or using only one averaged value over the whole city. The latter produces worse fit to the observed SQM data, implying that a use of various surface albedos is a need when modelling zenithal brightness in artificially lit areas of a city or town. Also, the seasonal changes of surface albedo cannot be neglected and the parameter itself must be included in the modelling tools. |
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0022-4073 |
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no |
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GFZ @ kyba @ |
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2675 |
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| Author |
Li, H.; Wu, M.; Tian, D.; Wu, L.; Niu, Z. |
| Title |
Monitoring and analysis of the expansion of the Ajmr Port, Davao City, Philippines using multi-source remote sensing data |
Type |
Journal Article |
| Year |
2019 |
Publication |
PeerJ |
Abbreviated Journal |
PeerJ |
| Volume |
7 |
Issue |
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Pages |
e7512 |
| Keywords |
Remote Sensing; Ecological environment; Monitoring; Philippines; Remote sensing; Small ports |
| Abstract |
Ports have been built or expanded in a number of countries to cater to increasing maritime trade in the 21st century. Port expansion is associated with economic and environmental impacts on the local and regional scales, and these impacts can be studied using remote sensing. The present study presents new results from multi-source remote sensing monitoring of the Ajmr Port expansion. An analysis of land use and vegetation coverage at the port is used to monitor the impact of port construction on the local ecology, while changes in roads, buildings, and lights are used to monitor the economic impact. The results show that: (1) After nine years of expansion, the port area has gradually expanded from the central to the southern coastal area, with an increase of 21.68 hectares during the expansion period. After the expansion, the area of builidings and construction in the study area increased significantly, while the area of water and green areas decreased significantly, indicating that the port construction changed the land use structure of the area. (2) From the perspective of vegetation coverage, the vegetation coverage within 5 km from the port is in good condition. After 9 years, the vegetation coverage in the region between 0.6 and 1 increased from 43.71% to 44.25%, reflecting the higher overall greening level in the region. (3) By analyzing the increase in roads and buildings, it can be seen that the port's comprehensive transportation capacity has improved, the population of the region has increased significantly. As the scale of construction has been continuously expanded , the prosperity as increased. (4) By analyzing the changes in the light index, the light data from the northeast to the southwest in the region is very obvious, and it is clearly located along the coast, indicating that the economic development of the coastal zone is faster than other regions, and the coastal region has promoted the development of the inland region. |
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The State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China |
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English |
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2167-8359 |
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PMID:31489267; PMCID:PMC6705383 |
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no |
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GFZ @ kyba @ |
Serial |
2674 |
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| Author |
Shlesinger, T.; Loya, Y. |
| Title |
Breakdown in spawning synchrony: A silent threat to coral persistence |
Type |
Journal Article |
| Year |
2019 |
Publication |
Science (New York, N.Y.) |
Abbreviated Journal |
Science |
| Volume |
365 |
Issue |
6457 |
Pages |
1002-1007 |
| Keywords |
Animals; Coral |
| Abstract |
The impacts of human and natural disturbances on coral reefs are typically quantified through visible damage (e.g., reduced coral coverage as a result of bleaching events), but changes in environmental conditions may also cause damage in less visible ways. Despite the current paradigm, which suggests consistent, highly synchronized spawning events, corals that reproduce by broadcast spawning are particularly vulnerable because their reproductive phenology is governed by environmental cues. Here, we quantify coral spawning intensity during four annual reproductive seasons, alongside laboratory analyses at the polyp, colony, and population levels, and we demonstrate that, compared with historical data, several species from the Red Sea have lost their reproductive synchrony. Ultimately, such a synchrony breakdown reduces the probability of successful fertilization, leading to a dearth of new recruits, which may drive aging populations to extinction. |
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School of Zoology, George S. Wise Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv 69978, Israel |
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English |
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0036-8075 |
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PMID:31488683 |
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GFZ @ kyba @ |
Serial |
2673 |
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