7 July 1998 Retrieval of the aerosol particle size distribution (APSD) in the lower part of the marine atmospheric boundary layer (LP MABL) from horizontal measurements of the atmospheric spectral transmittance
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Abstract
The possibilities of retrieving the aerosol particle size distribution (APSD) from measurements of the horizontal infrared transmittance in the lower part of the marine atmospheric boundary layer (LP MABL) are studied. The results of the measurements in Denmark in 1996 and in Scotland in 1949 are considered. The analysis of the spectral behavior of the aerosol attenuation obtained from the Denmark Experiment revealed certain peculiarities inconsistent with today's knowledge about natural aerosol in LP MABL. Although the spectral ranges used in the Denmark Experiment are quite sufficient for performing a successful inversion, it proved to be impossible to invert the aerosol attenuation into APSD by the usual methods, because none of the existing models of natural aerosol conforms to the spectral behavior like the one seen in the Denmark Experiment. Possible causes of the peculiarities of the Denmark data are discussed, and some recommendations for future experiments are suggested. The analysis of the Scotland Experiment revealed a more real spectral behavior of atmospheric aerosol for a significant part of the measurement range. This made it possible to invert the experimental data into APSD and to retrieve the aerosol attenuation at the spectral range where the measurement data were absent. The error of such a retrieval is within the error limits of the initial measurement data.
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Kusiel S. Shifrin, Kusiel S. Shifrin, Rowena M. Carlson, Rowena M. Carlson, Ilja G. Zolotov, Ilja G. Zolotov, } "Retrieval of the aerosol particle size distribution (APSD) in the lower part of the marine atmospheric boundary layer (LP MABL) from horizontal measurements of the atmospheric spectral transmittance", Proc. SPIE 3375, Targets and Backgrounds: Characterization and Representation IV, (7 July 1998); doi: 10.1117/12.327170; https://doi.org/10.1117/12.327170
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