Change of Light Pollution in Calgary 2010-2021 (IMAGE)

GFZ Helmholtz-Zentrum für Geoforschung

Change of Light Pollution in Calgary 2010-2021

Caption

Astronaut photographs of parts of Calgary (Canada) show examples of how lighting changed from 2010-2021: New lighting has been installed and many streetlights have been converted from orange high pressure sodium to white LED. (Note: The photos are not taken with the same settings, and have different spatial resolution. Thus, the 2010 photo appears somewhat brighter.

Credit

Images courtesy of the Earth Science and Remote Sensing Unit, NASA Johnson Space Center, georeferencing by GFZ Potsdam

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