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| Author | Collison, F.M.; Poe, K. | ||||
| Title | “Astronomical Tourism”: The Astronomy and Dark Sky Program at Bryce Canyon National Park | Type | Journal Article | ||
| Year | 2013 | Publication | Tourism Management Perspectives | Abbreviated Journal | Tourism Management Perspectives |
| Volume | 7 | Issue | Pages | 1-15 | |
| Keywords | Astronomy-related tourism; National parks; Night sky darkness; astrotourism; dark skies | ||||
| Abstract | Astronomical tourism represents a less-studied segment of sustainable tourism, where a dark night sky is the underlying resource. This article evaluates an astronomical tourism program, in this case at a national park with dark skies for observing. Bryce Canyon National Park (BCNP) in the southwestern United States has a well-developed astronomy program to serve visitors. The program consists of solar viewing during the day, multimedia evening programs, and night-time star gazing with telescopes. Depending on the specific measure used, it appears that up to 10% of park visitors may be involved with the formal Astronomy and Dark Sky Program and/or more informal astronomy activities. BCNP appears well positioned to take advantage of the dark sky attributes of the park and to educate visitors about the importance of maintaining and/or increasing the darkness of night skies. Potential future developments in the program may serve to further increase the number of visitors to BCNP. | ||||
| Address | School of Travel Industry Management, 1901 Ruby Lane, Liberty, MO 64068; collison(at)hawaii.edu | ||||
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| ISSN | 2211-9736 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | IDA @ john @ | Serial | 128 | ||
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| Author | Ren, Z.; Liu, Y.; Chen, B.; Xu, B. | ||||
| Title | Where Does Nighttime Light Come From? Insights from Source Detection and Error Attribution | Type | Journal Article | ||
| Year | 2020 | Publication | Remote Sensing | Abbreviated Journal | Remote Sensing |
| Volume | 12 | Issue | 12 | Pages | 1922 |
| Keywords | Remote Sensing | ||||
| Abstract | Nighttime light remote sensing has aroused great popularity because of its advantage in estimating socioeconomic indicators and quantifying human activities in response to the changing world. Despite many advances that have been made in method development and implementation of nighttime light remote sensing over the past decades, limited studies have dived into answering the question: Where does nighttime light come from? This hinders our capability of identifying specific sources of nighttime light in urbanized regions. Addressing this shortcoming, here we proposed a parcel-oriented temporal linear unmixing method (POTLUM) to identify specific nighttime light sources with the integration of land use data. Ratio of root mean square error was used as the measure to assess the unmixing accuracy, and parcel purity index and source sufficiency index were proposed to attribute unmixing errors. Using the Visible Infrared Imaging Radiometer Suite (VIIRS) nighttime light dataset from the Suomi National Polar-Orbiting Partnership (NPP) satellite and the newly released Essential Urban Land Use Categories in China (EULUC-China) product, we applied the proposed method and conducted experiments in two China cities with different sizes, Shanghai and Quzhou. Results of the POTLUM showed its relatively robust applicability of detecting specific nighttime light sources, achieving an rRMSE of 3.38% and 1.04% in Shanghai and Quzhou, respectively. The major unmixing errors resulted from using impure land parcels as endmembers (i.e., parcel purity index for Shanghai and Quzhou: 54.48%, 64.09%, respectively), but it also showed that predefined light sources are sufficient (i.e., source sufficiency index for Shanghai and Quzhou: 96.53%, 99.55%, respectively). The method presented in this study makes it possible to identify specific sources of nighttime light and is expected to enrich the estimation of structural socioeconomic indicators, as well as better support various applications in urban planning and management. | ||||
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| ISSN | 2072-4292 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | GFZ @ kyba @ | Serial | 3032 | ||
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| Author | Wuchterl, G.; Reithofer, M. | ||||
| Title | Licht über Wien VII | Type | Journal Article | ||
| Year | 2020 | Publication | Abbreviated Journal | ||
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| Keywords | Skyglow; Energy | ||||
| Abstract | 231. Auf einen BlickDie Helligkeit des Wiener Nachthimmels hat sich stabilisiert. 2019 ist das zweite Jahr in Folge, in dem die Energie desLichts über Wien um weniger als 5 % zugenommen hat. Die Menge des künstlichen Lichts über Wien hat sich nach dem steilem Anstieg der Jahre 2009 bis 2014 auf hohem Niveau eingependelt..Es besteht ein enger Zusammenhang zwischen Licht- und Luftverschmutzung. Über 10 Jahre bestehende Korrelationen von Lichtimmissions- und Luftgüteindikatoren bestätigen dies. Auf dieser Erkenntnis beruht eine auf standardisierte Luft-güte-Bedingungen normierte Angabe der Globalstrahlung, mit der direkter auf die von der Stadt eingebrachten Lichtmenge geschlossen werden kann.Der Kunstlichthalo über Wien wurde mit einer neuen Methode vollständiger berechnet und enthält demnach deutlich mehr Energie als bisher angenommen. 500 Gigawattstunden und 100.000 Tonnen CO2-Äquivalent pro Jahr müssen als typischer Wert für eine Untergrenze angenommen werden. | ||||
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| Publisher | Verein Kuffner-Sternwarte | Place of Publication | Vienna | Editor | |
| Language | German | Summary Language | Original Title | ||
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| Notes | Approved | no | |||
| Call Number | GFZ @ kyba @ | Serial | 3033 | ||
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| Author | Kolláth, Z.; Kránicz, B. | ||||
| Title | On the feasibility of inversion methods based on models of urban sky glow | Type | Journal Article | ||
| Year | 2014 | Publication | Journal of Quantitative Spectroscopy and Radiative Transfer | Abbreviated Journal | Journal of Quantitative Spectroscopy and Radiative Transfer |
| Volume | 139 | Issue | Pages | 27-34 | |
| Keywords | Light pollution; Radiative transfer; Light scattering | ||||
| Abstract | Multi-wavelength imaging luminance photometry of sky glow provides a huge amount of information on light pollution. However, the understanding of the measured data involves the combination of different processes and data of radiation transfer, atmospheric physics and atmospheric constitution. State-of-the-art numerical radiation transfer models provide the possibility to define an inverse problem to obtain information on the emission intensity distribution of a city and perhaps the physical properties of the atmosphere. We provide numerical tests on the solvability and feasibility of such procedures. | ||||
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| ISSN | 0022-4073 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | IDA @ john @ | Serial | 179 | ||
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| Author | Kocifaj, M. | ||||
| Title | Modeling the night-sky radiances and inversion of multi-angle and multi-spectral radiance data | Type | Journal Article | ||
| Year | 2014 | Publication | Journal of Quantitative Spectroscopy and Radiative Transfer | Abbreviated Journal | Journal of Quantitative Spectroscopy and Radiative Transfer |
| Volume | 139 | Issue | Pages | 35-42 | |
| Keywords | Sky-glow; Light pollution; Aerosols; Light scattering; Inverse problems | ||||
| Abstract | Information on a city's emission pattern is crucial for any reasonable predictions of night sky radiances. Unfortunately, the bulk radiant intensity distribution as a function of zenith angle is scarcely available for any city throughout the world. Even if the spatial arrangements of urban light fixtures and lamp specifications are known, the cumulative effect on upwardly directed beams is difficult to determine; due to heterogeneity of the ambient environment, reflectance from ground surfaces, arbitrarily scattered obstacles, orography of terrain and many other site specific factors. The present paper develops a theoretical model and a numerical technique applicable to the retrieval of a City Emission Function (CEF) from the spectral sky radiances measured under clear sky conditions. Mathematically it is an inverse problem that is solved using a regularization algorithm in which the minimization routines penalize non-smooth solutions and the radiant intensity pattern is found subject to regularizing constraints. When spectral sky radiances are measured at a set of discrete wavelengths or at a set of discrete distances from the monitored light source, both the aerosol optical properties and the CEF can be determined concurrently. One great advantage of this approach is that no a-priori assumptions need to be made concerning aerosol properties, such as aerosol optical depth. The numerical experiment on synthetically generated city emissions' patterns has proven the functionality of the method presented. |
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| Address | ICA, Slovak Academy of Sciences, Dúbravská Road 9, 845 03 Bratislava, Slovakia. | ||||
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| ISSN | 0022-4073 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | IDA @ john @ | Serial | 180 | ||
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