[SQM] Article on Light pollution in Hong Kong

Anthony Tekatch anthony at unihedron.com
Tue May 27 22:11:13 UTC 2014

Hello All,

You may be interested in this article:
  Contributions of artificial lighting sources on light pollution in Hong
  Kong measured through a night sky brightness monitoring network

  By: Chun Shing Jason Pun, Chu Wing So, Wai Yan Leung, Chung Fai Wong

  Science Direct http://www.sciencedirect.com/science/article/pii/S0022407313004950
  arXiv (Free): http://arxiv.org/abs/1401.1200

  Light pollution is a form of environmental degradation in which
  excessive artificial outdoor lighting, such as street lamps, neon
  signs, and illuminated signboards, affects the natural environment and
  the ecosystem. Poorly designed outdoor lighting not only wastes energy,
  money, and valuable Earth resources, but also robs us of our beautiful
  night sky. Effects of light pollution on the night sky can be evaluated
  by the skyglow caused by these artificial lighting sources, through
  measurements of the night sky brightness (NSB). The Hong Kong Night Sky
  Brightness Monitoring Network (NSN) was established to monitor in
  detail the conditions of light pollution in Hong Kong. Monitoring
  stations were set up throughout the city covering a wide range of urban
  and rural settings to continuously measure the variations of the NSB.
  Over 4.6 million night sky measurements were collected from 18 distinct
  locations between May 2010 and March 2013. This huge dataset, over two
  thousand times larger than our previous survey, forms the backbone for
  studies of the temporal and geographical variations of this
  environmental parameter and its correlation with various natural and
  artificial factors. The concepts and methodology of the NSN were
  presented here, together with an analysis of the overall night sky
  conditions in Hong Kong. The average NSB in Hong Kong, excluding data
  affected by the Moon, was 16.8 mag arcsec−2, or 82 times brighter than
  the dark site standard established by the International Astronomical
  Union (IAU). The urban night sky was on average 15 times brighter than
  that in a rural location, firmly establishing the effects of artificial
  lighting sources on the night sky. 

Best regards,
Anthony Tekatch

More information about the sqm mailing list