World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Long-term Chemical Characterization of Tropical and Marine Aerosols at the Cvao: Field Studies (2007 to 2011) : Volume 14, Issue 3 (14/02/2014)

By Fomba, K. W.

Click here to view

Book Id: WPLBN0003978791
Format Type: PDF Article :
File Size: Pages 55
Reproduction Date: 2015

Title: Long-term Chemical Characterization of Tropical and Marine Aerosols at the Cvao: Field Studies (2007 to 2011) : Volume 14, Issue 3 (14/02/2014)  
Author: Fomba, K. W.
Volume: Vol. 14, Issue 3
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Poulain, L., Müller, K., Pinxteren, D. V., Herrmann, H., Fomba, K. W., & Pinxteren, M. V. (2014). Long-term Chemical Characterization of Tropical and Marine Aerosols at the Cvao: Field Studies (2007 to 2011) : Volume 14, Issue 3 (14/02/2014). Retrieved from http://www.ebooklibrary.org/


Description
Description: TROPOS – Leibniz-Institut für Troposphärenforschung, Permoserstr. 15, 04318 Leipzig, Germany. The first long-term aerosol sampling and chemical characterization results from measurements at the Cape Verde Atmospheric Observatory (CVAO) on the island of São Vicente are presented and are discussed with respect to air mass origin and seasonal trends. In total 671 samples were collected using a high volume PM10 sampler on quartz fiber filters from January 2007 to December 2011. The samples were analyzed for their aerosol chemical composition including their ionic and organic constituents. Back trajectory analyses showed that the aerosol at CVAO was strongly influenced by emissions from Europe and Africa with the later often responsible for high mineral dust loading. Sea salt and mineral dust dominated the aerosol mass and made up in total about 80% of the aerosol mass. The 5 yr PM10 mean was 47.1 ± 55.5 Μg m−3 while the mineral dust and sea salt means were 27.9 ± 48.7 Μg m−3 and 11.1 ± 5.5 Μg m−3, respectively. Non-sea-salt (nss) sulfate made up 62% of the total sulfate and originated from both long range transport from Africa or Europe and marine sources. Strong seasonal variation was observed for the aerosol components. While nitrate showed no clear seasonal variation with an annual mean of 1.1 ± 0.6 Μg m−3, the aerosol mass, OC and EC, showed strong winter maxima due to strong influence of African air mass inflow. Additionally during summer, elevated concentrations of OM were observed originating from marine emissions. A summer maximum was observed for non-sea-salt sulfate and was connected to periods where air mass inflow was predominantly of marine origin indicating that marine biogenic emissions were a significant source. Ammonium showed distinct maximum in spring and good correlation with ocean surface water chlorophyll a concentrations. Good correlations were also observed between nss-sulfate and oxalate during the summer and winter seasons indicating a likely photochemical in-cloud processing of the marine and anthropogenic precursors of these species. High temporal variability was observed in both chloride and bromide depletion differing significantly within the seasons, air mass history and Saharan dust concentration. Chloride (bromide) depletion varied from 8.8 ± 8.5% (62 ± 42%) in Saharan dust dominated air mass to 30 ± 12% (87 ± 11%) in polluted Europe air masses. During summer, bromide depletion often reached 100% in pure marine as well as in polluted continental samples. In addition to the influence of the aerosol acidic components, photochemistry was one of the main drivers of halogenide depletion during the summer while during dust events, displacement reaction with nitric acid was found to be the dominant mechanism. PMF analysis identified three major aerosol sources including sea salt, aged sea salt and long range transport. The ionic budget was dominated by the first two of these factors while the long range transport factor could only account for about 14% of the total observed ionic mass.

Summary
Long-term chemical characterization of tropical and marine aerosols at the CVAO: field studies (2007 to 2011)

Excerpt
Alastuey, A., Querol, X., Castillo, S., Escudero, M., Avila, A., Cuevas, E., Torres, C., Romero, P. M., Exposito, F., Garcia, O., Diaz, J. P., Van Dingenen, R., and Putaud, J. P.: Characterisation of TSP and PM2.5 at Izana and Sta. Cruz de Tenerife (Canary Islands, Spain) during a Saharan dust episode (July 2002), Atmos. Environ., 39, 4715–4728, 2005.; Allan, J. D., Topping, D. O., Good, N., Irwin, M., Flynn, M., Williams, P. I., Coe, H., Baker, A. R., Martino, M., Niedermeier, N., Wiedensohler, A., Lehmann, S., Müller, K., Herrmann, H., and McFiggans, G.: Composition and properties of atmospheric particles in the eastern Atlantic and impacts on gas phase uptake rates, Atmos. Chem. Phys., 9, 9299–9314, doi:10.5194/acp-9-9299-2009, 2009.; Alves, C., Oliveira, T., Pio, C., Silvestre, A. J. D., Fialho, P., Barata, F., and Legrand, M.: Characterisation of carbonaceous aerosols from the Azorean Island of Terceira, Atmos. Environ., 41, 1359–1373, 2007.; Amato, F.,Pandolfi, M., Escrig, A., Querol, X., Alastuey, A., Pey, J., Perez, N., and Hopke, P. K.: Quantifying road dust resuspension in urban environment by multilinear engine: a comparison with PMF2, Atmos. Environ., 43, 2770–2780, 2009.; Anguelova, M. D.: Whitecaps, sea-salt aerosols, and climate, Ph.D. Dissertation, University of Delaware, Newark, 2002.; Bates, T. S., Lamb, B. K., Guenther, A., Dignon, J., and Stoiber, R. E.: Sulfur emissions to the atmosphere from natural sources, J. Atmos. Chem., 14, 315–337, 1992.; de Leeuw, G., Neele, F. P., Hill, M., Smith, M. H., and Vignati, E.: Production of sea spray in the surf zone, J. Geophys. Res.-Atmos., 105, 29397–29409, 2000.; Bates, T. S., Quinn, P. K., Coffman, D. J., Johnson, J. E., Miller, T. L., Covert, D. S., Wiedensohler, A., Leinert, S., Nowak, A., and Neususs, C.: Regional physical and chemical properties of the marine boundary layer aerosol across the Atlantic during Aerosols99: an overview, J. Geophys. Res.-Atmos., 106, 20767–20782, 2001.; Canonaco, F., Crippa, M., Slowik, J. G., Baltensperger, U., and Prévôt, A. S. H.: SoFi, an Igor based interface for the efficient use of the generalized multilinear engine (ME-2) for source apportionment: application to aerosol mass spectrometer data, Atmos. Meas. Tech. Discuss., 6, 6409–6443, doi:10.5194/amtd-6-6409-2013, 2013.; Carlton, A. G., Turpin, B. J., Altieri, K. E., Seitzinger, S., Reff, A., Lim, H. J., and Ervens, B.: Atmospheric oxalic acid and SOA production from glyoxal: results of aqueous photooxidation experiments, Atmos. Environ., 41, 7588–7602, 2007.; Carpenter, E. J., Subramaniam, A., and Capone, D. G.: Biomass and primary productivity of the cyanobacterium Trichodesmium spp. in the tropical N Atlantic ocean, Deep-Sea Res. Pt. I, 51, 173–203, 2004.; Carpenter, L. J., Fleming, Z. L., Read, K. A., Lee, J. D., Moller, S. J., Hopkins, J. R., Purvis, R. M., Lewis, A. C., Müller, K., Heinold, B., Herrmann, H., Fomba, K. W., van Pinxteren, D., Muller, C., Tegen, I., Wiedensohler, A., Müller, T., Niedermeier, N., Achterberg, E. P., Patey, M. D., Kozlova, E. A., Heimann, M., Heard, D. E., Plane, J. M. C., Mahajan, A., Oetjen, H., Ingham, T., Stone, D., Whalley, L. K., Evans, M. J., Pilling, M. J., Leigh, R. J., Monks, P. S., Karunaharan, A., Vaughan, S., Arnold, S. R., Tschritter, J., Pohler, D., Friess, U., Holla, R., Mendes, L. M., Lopez, H., Faria, B., Manning, A. J., and Wallace, D. W. R.: Seasonal characteristics of tropical marine boundary layer air measured at the Cape Verde Atmospheric Observatory, J. Atmos. Chem., 67, 87–140, 2010.; Chen, Y. and Siefert, R. L.: Determination of various types of labile atmospheric iron over remote oceans, J. Geophys. Res.-Atmos., 108, 4774, doi:10.1029/2003jd003515, 2003.; Chen, Y. and Siefert, R. L.: Seasonal and sp

 

Click To View

Additional Books


  • Influence of Satellite-derived Photolysi... (by )
  • Trends of Non-methane Hydrocarbons (Nmhc... (by )
  • The Effect of Coal-fired Power-plant So2... (by )
  • Linking Horizontal and Vertical Transpor... (by )
  • The Effect of Varying Levels of Surfacta... (by )
  • Time-resolved Measurements of Black Carb... (by )
  • Mainz Isoprene Mechanism 2 (Mim2): an Is... (by )
  • Mass Spectrometry of Refractory Black Ca... (by )
  • Trajectory Model Simulations of Ozone an... (by )
  • Model Uncertainties Affecting Satellite-... (by )
  • Metal Complexation Inhibits the Effect o... (by )
  • Increased Northern Hemispheric Carbon Mo... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.