Optical properties of tropospheric aerosol and sulfate scattering efficiency measured at Neumayer Station, Antarctica ...

• Main Authors: Weller, Rolf, Lampert, Astrid
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2008
• Subjects: Air chemistry observatory; Neumayer_based; NEUMAYER III; Atmospheric Chemistry @ AWI AWI_AC; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.1594/pangaea.695432; https://doi.pangaea.de/10.1594/PANGAEA.695432

We measured optical properties and ionic composition of the aerosol at Neumayer Station from 2004 through 2006 by an integrating nephelometer and chemical analysis of daily aerosol samples, respectively. From this unique data set we discuss the seasonality of aerosol optical parameters along with their chemical composition. Austral summer (November through March) was characterized by mean particle number concentrations of 472±260 cm**-3 compared to 168±160 cm**-3 during winter (April through October), mean scattering Ångström exponents of 1.7±0.6 compared to 1.3±0.6 during winter, and mean backscattering ratios at 700 nm of 0.21±0.13 compared to 0.17±0.08 during winter. In contrast, light scattering coefficients (ssp) showed a broad maximum during winter (4.8±5.3 1/µm for ssp(550)). The mean single scattering albedo was 0.99± at 550 nm. We further derived mass scattering and mass backscattering efficiencies for biogenic sulfate aerosol (BSA) at 450 nm, 550 nm, and 700 nm for relative humidities between 5% ... : Supplement to: Weller, Rolf; Lampert, Astrid (2008): Optical properties and sulfate scattering efficiency of boundary layer aerosol at coastal Neumayer Station, Antarctica. Journal of Geophysical Research: Atmospheres, 113, D16208 ...