Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992iau..meet.....l&link_type=abstract
Presented at the IAU/ICSU/UNESCO Exposition in the Adverse Environment Impact on Astronomy, Paris, France, 30 Jun. - 2 Jul. 1992
Astronomy and Astrophysics
Astronomy
1
Aerosols, Atmospheric Scattering, Extinction, Light Scattering, Optical Thickness, Seeing (Astronomy), Annual Variations, Astronomy, Climate Change, Radiometers, Stellar Spectrophotometry, Turbidity, Visibility
Scientific paper
Atmospheric aerosol particles originating from natural sources, such as volcanos and sulfur-bearing gas emissions from the oceans, and from human sources, such as sulfur emissions from fossil fuel combustion and biomass burning, strongly affect visual air quality and are suspected to significantly affect radiative climate forcing of the planet. During the daytime, aerosols obscure scenic vistas, while at night they diminish our ability to observe stellar objects. Scattering of light is the main means by which aerosols attenuate and redistribute light in the atmosphere and by which aerosols can alter and reduce visibility and potentially modify the energy balance of the planet. Trends and seasonal variability of atmospheric aerosol loading, such as column-integrated light extinction or optical depth, and how they may affect potential climate change have been difficult to quantify because there have been few observations made of important aerosol optical parameters, such as optical depth, over the globe and over time and often these are of uneven quality. To address questions related to possible climate change, there is a pressing need to acquire more high-quality aerosol optical depth data. Extensive deployment of improved solar radiometers over the next few years will provide higher-quality extinction data over a wider variety of locations worldwide. An often overlooked source of turbidity data, however, is available from astronomical observations, particularly stellar photoelectric photometry observations. With the exception of the Project ASTRA articles published almost 20 years ago, few of these data ever appear in the published literature. This paper will review the current status of atmospheric extinction observations, as highlighted by the ASTRA work and augmented by more recent solar radiometry measurements.
No associations
LandOfFree
Light extinction in the atmosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Light extinction in the atmosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light extinction in the atmosphere will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1205298