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Title: Ground-based off-line aerosol measurements at Praia, Cape Verde, during the Saharan Mineral Dust Experiment: Microphysical properties and mineralogy
Authors: Kandler, K.Schütz, L.Jäckel, S.Lieke, K.Emmel, C.Müller-Ebert, D.Ebert, M.Scheuvens, D.Schladitz, A.Šegvić, B.Wiedensohler, A.Weinbruch, S.
Publishers Version: https://doi.org/10.1111/j.1600-0889.2011.00546.x
Issue Date: 2017
Published in: Tellus B: Chemical and Physical Meteorology , Volume 63, Issue 4, Page 459-474
Publisher: Milton Park : Taylor & Francis
Abstract: A large field experiment of the Saharan Mineral Dust Experiment (SAMUM) was performed in Praia, Cape Verde, in January and February 2008. This work reports on the aerosol mass concentrations, size distributions and mineralogical composition of the aerosol arriving at Praia. Three dust periods were recorded during the measurements, divided by transitional periods and embedded in maritime-influenced situations. The total suspended particle mass/PM10/PM2.5 were 250/180/74μg/m3 on average for the first dust period (17–21 January) and 250/230/83μg/m3 for the second (24–26 January). The third period (28 January to 2 February) was the most intensive with 410/340/130 μg/m3. Four modes were identified in the size distribution. The first mode (50–70 nm) and partly the second (700–1100 nm) can be regarded as of marine origin, but some dust contributes to the latter. The third mode (2–4 μm) is dominated by advected dust, while the intermittently occurring fourth mode (15–70 μm) may have a local contribution. The dust consisted of kaolinite (dust/maritime period: 35%wt./25%wt.),K-feldspar (20%wt./25%wt.), illite (14%wt./10%wt.), quartz (11%wt./8%wt.), smectites (6%wt./4%wt.), plagioclase (6%wt./1%wt.), gypsum (4%wt./7%wt.), halite (2%wt./17%wt.) and calcite (2%wt./3%wt.).
Keywords: aerosol; calcite; chemical composition; dust; feldspar; gypsum; illite; mineralogy; physical property; plagioclase; quartz; size distribution; smectite; suspended particulate matter
DDC: 550
License: CC BY 4.0 Unported
Link to License: https://creativecommons.org/licenses/by/4.0/
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