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2545 Central Avenue
Boulder, CO 80301
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Visibility

Visibility and optical properties

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Great smoky mountains National Park OPCRDS shakedown

In partnership with the National Park Service and Great Smoky Mountains National Park, Handix Scientific deployed its first commercial-version of the Open Path Cavity Ringdown Spectrometer (OPCRDS) at the IMPROVE visibility monitoring site in the park in late summer and fall of 2016. The purpose of the deployment was to evaluate the impacts of high relative humidity on aerosol extinction (and visibility), compare to existing optical and chemical methods in place at the site used to estimate visibility, and test various components of the new OPCRDS instrument. Initial results from the study will be presented at the AWMA Visibility conference in Jackson Hole, WY.

Example of OPCRDS light extinction coefficients, dry light extinction coefficients measured by an Aerodyne Research CAPS instrument, and relative humidity measured inside the OPCRDS sample duct measured during the Great Smoky Mountains NP deployment.

Example of OPCRDS light extinction coefficients, dry light extinction coefficients measured by an Aerodyne Research CAPS instrument, and relative humidity measured inside the OPCRDS sample duct measured during the Great Smoky Mountains NP deployment.