In-situ and path-averaged measurements of aerosol optical properties

Sven A. van Binsbergen; Peter Grossmann; Faith J. February; Leo H. Cohen; Alexander M. J. van Eijk; Karin U. Stein

doi:10.1117/12.2275861

7 September 2017 In-situ and path-averaged measurements of aerosol optical properties

Sven A. van Binsbergen, Peter Grossmann, Faith J. February, Leo H. Cohen, Alexander M. J. van Eijk, Karin U. Stein

Proceedings Volume 10408, Laser Communication and Propagation through the Atmosphere and Oceans VI; 104080V (2017) https://doi.org/10.1117/12.2275861
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

This paper compares in-situ and path-averaged measurements of the electro-optical transmission, with emphasis on aerosol effects. The in-situ sensors consisted of optical particle counters (OPC), the path-averaged data was provided by a 7-wavelength transmissometer (MSRT) and scintillometers (BLS). Data were collected at two sites: a homogeneous test site in Northern Germany, and over the inhomogeneous False Bay near Cape Town, South Africa. A retrieval algorithm was developed to infer characteristics of the aerosol size distribution (Junge approximation) from the MSRT data. A comparison of the various sensors suggests that the optical particle counters are over optimistic in their estimate of the transmission. For the homogeneous test site, in-situ and path-averaged sensors yield similar results. For the inhomogeneous test site, sensors may react differently or temporally separated to meteorological events such as a change in wind speed and/or direction.

Citation Download Citation

Sven A. van Binsbergen, Peter Grossmann, Faith J. February, Leo H. Cohen, Alexander M. J. van Eijk, and Karin U. Stein "In-situ and path-averaged measurements of aerosol optical properties", Proc. SPIE 10408, Laser Communication and Propagation through the Atmosphere and Oceans VI, 104080V (7 September 2017); https://doi.org/10.1117/12.2275861

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