Mass deposition fluxes of Saharan mineral dust to the tropical northeast Atlantic Ocean: An intercomparison of methods
Mass deposition fluxes of mineral dust to the tropical northeast Atlantic Ocean were determined within this study. In the framework of SOPRAN (Surface Ocean Processes in the Anthropocene), the interaction between the atmosphere and the ocean in terms of material exchange were investigated at the Cap...
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ftleibnizopen:oai:oai.leibnizopen.de:Su9q6YoBg80Wlv182YXi 2023-10-29T02:38:51+01:00 Mass deposition fluxes of Saharan mineral dust to the tropical northeast Atlantic Ocean: An intercomparison of methods Niedermeier, N. Held, A. Müller, T. Heinold, B. Schepanski, K. Tegen, I. Kandler, K. Ebert, M. Weinbruch, S. Read, K. Lee, J. Fomba, K.W. Müller, K. Herrmann, H. Wiedensohler, A. 2014 application/pdf https://doi.org/10.34657/1074 https://oa.tib.eu/renate/handle/123456789/706 eng eng München : European Geopyhsical Union CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ Atmospheric Chemistry and Physics, Volume 14, Issue 5, Page 2245-2266 anemometer atmospheric deposition atmospheric transport dry deposition dust particle size photometer remote sensing size distribution wet deposition 550 article Text 2014 ftleibnizopen https://doi.org/10.34657/1074 2023-10-01T23:12:12Z Mass deposition fluxes of mineral dust to the tropical northeast Atlantic Ocean were determined within this study. In the framework of SOPRAN (Surface Ocean Processes in the Anthropocene), the interaction between the atmosphere and the ocean in terms of material exchange were investigated at the Cape Verde atmospheric observatory (CVAO) on the island Sao Vicente for January 2009. Five different methods were applied to estimate the deposition flux, using different meteorological and physical measurements, remote sensing, and regional dust transport simulations. The set of observations comprises micrometeorological measurements with an ultra-sonic anemometer and profile measurements using 2-D anemometers at two different heights, and microphysical measurements of the size-resolved mass concentrations of mineral dust. In addition, the total mass concentration of mineral dust was derived from absorption photometer observations and passive sampling. The regional dust model COSMO-MUSCAT was used for simulations of dust emission and transport, including dry and wet deposition processes. This model was used as it describes the AOD's and mass concentrations realistic compared to the measurements and because it was run for the time period of the measurements. The four observation-based methods yield a monthly average deposition flux of mineral dust of 12–29 ng m−2 s−1. The simulation results come close to the upper range of the measurements with an average value of 47 ng m−2 s−1. It is shown that the mass deposition flux of mineral dust obtained by the combination of micrometeorological (ultra-sonic anemometer) and microphysical measurements (particle mass size distribution of mineral dust) is difficult to compare to modeled mass deposition fluxes when the mineral dust is inhomogeneously distributed over the investigated area. publishedVersion Article in Journal/Newspaper Northeast Atlantic LeibnizOpen (The Leibniz Association) |
institution |
Open Polar |
collection |
LeibnizOpen (The Leibniz Association) |
op_collection_id |
ftleibnizopen |
language |
English |
topic |
anemometer atmospheric deposition atmospheric transport dry deposition dust particle size photometer remote sensing size distribution wet deposition 550 |
spellingShingle |
anemometer atmospheric deposition atmospheric transport dry deposition dust particle size photometer remote sensing size distribution wet deposition 550 Niedermeier, N. Held, A. Müller, T. Heinold, B. Schepanski, K. Tegen, I. Kandler, K. Ebert, M. Weinbruch, S. Read, K. Lee, J. Fomba, K.W. Müller, K. Herrmann, H. Wiedensohler, A. Mass deposition fluxes of Saharan mineral dust to the tropical northeast Atlantic Ocean: An intercomparison of methods |
topic_facet |
anemometer atmospheric deposition atmospheric transport dry deposition dust particle size photometer remote sensing size distribution wet deposition 550 |
description |
Mass deposition fluxes of mineral dust to the tropical northeast Atlantic Ocean were determined within this study. In the framework of SOPRAN (Surface Ocean Processes in the Anthropocene), the interaction between the atmosphere and the ocean in terms of material exchange were investigated at the Cape Verde atmospheric observatory (CVAO) on the island Sao Vicente for January 2009. Five different methods were applied to estimate the deposition flux, using different meteorological and physical measurements, remote sensing, and regional dust transport simulations. The set of observations comprises micrometeorological measurements with an ultra-sonic anemometer and profile measurements using 2-D anemometers at two different heights, and microphysical measurements of the size-resolved mass concentrations of mineral dust. In addition, the total mass concentration of mineral dust was derived from absorption photometer observations and passive sampling. The regional dust model COSMO-MUSCAT was used for simulations of dust emission and transport, including dry and wet deposition processes. This model was used as it describes the AOD's and mass concentrations realistic compared to the measurements and because it was run for the time period of the measurements. The four observation-based methods yield a monthly average deposition flux of mineral dust of 12–29 ng m−2 s−1. The simulation results come close to the upper range of the measurements with an average value of 47 ng m−2 s−1. It is shown that the mass deposition flux of mineral dust obtained by the combination of micrometeorological (ultra-sonic anemometer) and microphysical measurements (particle mass size distribution of mineral dust) is difficult to compare to modeled mass deposition fluxes when the mineral dust is inhomogeneously distributed over the investigated area. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Niedermeier, N. Held, A. Müller, T. Heinold, B. Schepanski, K. Tegen, I. Kandler, K. Ebert, M. Weinbruch, S. Read, K. Lee, J. Fomba, K.W. Müller, K. Herrmann, H. Wiedensohler, A. |
author_facet |
Niedermeier, N. Held, A. Müller, T. Heinold, B. Schepanski, K. Tegen, I. Kandler, K. Ebert, M. Weinbruch, S. Read, K. Lee, J. Fomba, K.W. Müller, K. Herrmann, H. Wiedensohler, A. |
author_sort |
Niedermeier, N. |
title |
Mass deposition fluxes of Saharan mineral dust to the tropical northeast Atlantic Ocean: An intercomparison of methods |
title_short |
Mass deposition fluxes of Saharan mineral dust to the tropical northeast Atlantic Ocean: An intercomparison of methods |
title_full |
Mass deposition fluxes of Saharan mineral dust to the tropical northeast Atlantic Ocean: An intercomparison of methods |
title_fullStr |
Mass deposition fluxes of Saharan mineral dust to the tropical northeast Atlantic Ocean: An intercomparison of methods |
title_full_unstemmed |
Mass deposition fluxes of Saharan mineral dust to the tropical northeast Atlantic Ocean: An intercomparison of methods |
title_sort |
mass deposition fluxes of saharan mineral dust to the tropical northeast atlantic ocean: an intercomparison of methods |
publisher |
München : European Geopyhsical Union |
publishDate |
2014 |
url |
https://doi.org/10.34657/1074 https://oa.tib.eu/renate/handle/123456789/706 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
Atmospheric Chemistry and Physics, Volume 14, Issue 5, Page 2245-2266 |
op_rights |
CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.34657/1074 |
_version_ |
1781065257133801472 |