**5. References**


Andreae, M.O. & Merlet, P. (2001). Emission of trace gases and aerosols from biomass burning. *Global Biogeochemical Cycles,* Vol. 15, No. 4, (December 2001), pp. 955–966, ISSN: 1944–9224

214 Atmospheric Aerosols – Regional Characteristics – Chemistry and Physics

variations in other urban and rural sites in Tanzania.

*Faculty of Science, Sokoine University of Agriculture, Tanzania* 

*Instituto de Química, Universidade Federal da Bahia, Brazil* 

Gisele O. da Rocha, José D.S. da Silva and Jailson B. de Andrade

**Author details** 

Stelyus L. Mkoma

**Acknowledgement** 

PM mass measurements.

ISSN: 1352-2310

**5. References** 

PM10 aerosols followed by oxalate. Of the ionic components, SO42−, K+, and Mg2+ in PM2.5 and SO42−, Na+, and Mg2+ in PM10 made lager contribution to total water-soluble inorganic aerosol mass. Various ratios and correlations between carboxylates and ions used for possible source identification suggest that primary emissions, secondary formation, and to a slightly extent sea spray and biomass burning could be the sources for the aerosols at this site. The ratio of acetate to formate was used to distinguish primary and secondary sources of these carboxylates and was found to be close to reported value for secondary reactions, indicating dominance of secondary sources. Substantial concentration of carboxylates and water-soluble ions observed in the Morogoro atmosphere suggest that it was urgent to study the characteristics and sources of these species to better understand their roles in the Tanzania environment. However, more work is needed to determine longer-chain (high) molecular weight carboxylic acids and related organic compounds and their seasonal

The authors are grateful to funding from Directorate of Research and Postgraduate Studies, Sokoine University of Agriculture (SUA)-Tanzania; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-Brazil; and Instituto Nacional de Ciência e Tecnologia, de Energia e Ambiente (INCT-E&A), Instituto de Química, Universidade Federal da Bahia (UFBA)-Brazil. We also wish to acknowledge Mr. Filbert T. Sogomba (SUA) for help in logistics and collection of aerosol samples and Cibele Cristina de Araújo Soares (UFBA) for

Aggarwal, S.G. & Kawamura, K. (2009). Carbonaceous and inorganic composition in longrange transported aerosols over northern Japan: Implication for aging of water-soluble organic fraction. *Atmospheric Environment*, Vol. 43, No. 16, (May 2009), pp. 2532–2540,

Allen, A.G., Cardoso, A.A. & da Rocha, G.O. (2004). Influence of sugar cane burning on aerosol soluble ion composition in Southeastern Brazil. *Atmospheric Environment*, Vol.

38, No. 30, (September 2004), pp. 5025-5038, ISSN: 1352-2310


	- Jacobson, M.C., Hanson, H.C., Noone, K.J. & Charlson, R.J. (2000). Organic atmospheric aerosols: review and state of the science. *Reviews of Geophysics,* Vol. 38, No. 2, (May 2000), pp. 267–294, ISSN: 1944–9208

Characteristics of Low-Molecular Weight

Carboxylic Acids in PM2.5 and PM10 Ambient Aerosols From Tanzania 217

Limbeck, A., Puxbaum, H., Otter, L. & Scholes, M.C. (2001). Semi-volatile behavior of dicarboxylic acids and other polar organic species at a rural background site (Nylsvley, RSA). *Atmospheric Environment*, Vol. 35, No. 10, (April 2001), pp. 1853–1862, ISSN: 1352-

Limon-Sanchez, M.T., Arriaga-Colina, J.L., Escalona-Segura, S. & Ruíz-Suárez, L.G. (2002). Observations of formic and acetic acids at three sites of Mexico City. *Science of the Total* 

Mader, B.T., Schauer, J.J., Seinfeld, J.H., Flagan, R.C., Yu, J.Z., Yang, H., Lim, H.J., Turpin, B.J., Deminter, J.T., Heidemann, G., Bae, M.S., Quinn, P., Bates, T., Eatough, D.J., Huebert, B.J., Bertram, T. & Howell, S. (2003). Sampling methods used for the collection of particle-phase organic and elemental carbon during ACE-Asia. *Atmospheric Environment,* Vol. 37, No. 11, (April 2003), pp. 1435–1449, ISSN: 1352-

Maenhaut, W., Nava, S., Lucarelli, F., Wang, W., Chi, X. & Kulmala, M. (2011). Chemical composition, impact from biomass burning, and mass closure for PM2.5 and PM10 aerosols at Hyytiälä, Finland, in summer 2007. *X-Ray Spectrometry,* Vol. 40, No. 3,

Mariani, R.L. & de Mello, W.Z. (2007). PM2.5–10, PM2.5 and associated water-soluble inorganic species at a coastal urban site in the metropolitan region of Rio de Janeiro. *Atmospheric Environment,* Vol. 41, No. 13, (April 2007), pp. 2887–2892, ISSN:

Millero, F.J. (2006). Chemical Oceanography (3rd ed.): 496, Taylor and Francis, CRC Press,

Mkoma, S.L., Wang, W., Maenhaut, W. & Tungaraza, C.T. (2010). Seasonal Variation of Atmospheric Composition of Water-Soluble Inorganic Species at Rural Background Site in Tanzania, East Africa. *Ethiopian Journal of Environmental Studies and Management*, Vol.

Mkoma, S.L., Maenhaut, W., Chi, X., Wang, W. & Raes, N. (2009b). Chemical composition and mass closure for PM10 aerosols during the 2005 dry season at a rural site in Morogoro, Tanzania. *X-Ray Spectrom*etry, Vol. 38, No. 4, (July/August 2009), pp. 293–

Mkoma, S.L., Chi, X., Maenhaut, W., Wang, W. & Raes, N. (2009a). Characterisation of PM10 Atmospheric Aerosols for the Wet Season 2005 at Two Sites in East Africa. *Atmospheric* 

Mochida, M., Kawabata, A., Kawamura, K., Hatsushika, H. & Yamazaki, K. (2003). Seasonal variation and origins of dicarboxylic acids in the marine atmosphere over the western North Pacific. *Journal of Geophysical Research,* Vol. 108, No. D6, (March 2003), pp. 4193–

Narukawa, M., Kawamura, K., Takeuchi, N. & Nakajima, T. (1999). Distribution of dicarboxylic acids and carbon isopotic compositions in aerosols from 1997 Indonesian

*Environment,* Vol. 43, No. 3, (January 2009), pp. 631-639, ISSN: 1352-2310

*Environment,* Vol. 287, No. 3, (March 2002), pp. 203–212, ISSN: 0048-9697

(May/June 2011), pp. 168–171, ISSN: 1097-4539

3, No. 2, (June 2010), pp. 27-38, ISSN: 1998-0507

Boca Raton, ISBN 0849322804, FL

300, ISSN: 1097-4539

4203, ISSN: 2156–2202

2310

2310

1352-2310


Limbeck, A., Puxbaum, H., Otter, L. & Scholes, M.C. (2001). Semi-volatile behavior of dicarboxylic acids and other polar organic species at a rural background site (Nylsvley, RSA). *Atmospheric Environment*, Vol. 35, No. 10, (April 2001), pp. 1853–1862, ISSN: 1352- 2310

216 Atmospheric Aerosols – Regional Characteristics – Chemistry and Physics

No. 1, (January 2006), pp. 49 – 55, ISSN: 0026-265X

(September 1993), pp. 2227–2233, ISSN: 1520-5851

(August 1999), pp. 17321–17333, ISSN: 2156–2202

2000), pp. 267–294, ISSN: 1944–9208

1438-4639

ISSN: 1352-2310

pp. 118-133, ISSN: 0021-8502

Jacobson, M.C., Hanson, H.C., Noone, K.J. & Charlson, R.J. (2000). Organic atmospheric aerosols: review and state of the science. *Reviews of Geophysics,* Vol. 38, No. 2, (May

Kappos, A.D., Bruckmann, P., Eikmann, T., Englert, N., Heinrich, U., Höppe, P., Koch, E., Krause, G.H.M., Kreyling, W.G., Rauchfuss, K., Rombout, P., Klemp, V.S., Thiel, W.R. & Wichmann, H.E. (2004). Health effects of particles in ambient air. I*nternational Journal of Hygiene and Environmental Health,* Vol. 207, No. 4, (August 2004), pp. 399-407, ISSN:

Karthikeyan, S. & Balasubramanian, R. (2006). Determination of water-soluble inorganic and organic species in atmospheric fine particulate matter. *Microchemical Journal,* Vol. 82,

Kawamura, K. & Ikushima, K. (1993). Seasonal changes in the distribution of dicarboxylic acids in the urban atmosphere. *Environmental Science and Technology,* Vol. 27, No. 10,

Kawamura, K., Kasukabe, H. & Barrie, L. (1996). Source and reaction pathways of dicarboxylic acids, ketoacids and dicarbonyls in Arctic aerosols: one year of observations. *Atmospheric Environment,* Vol. 30, No. 10-11, (May 1996), pp. 1709–1722,

Kawamura, K. & Sakaguchi, F. (1999). Molecular distribution of water soluble carboxylic acids in marine aerosols over the Pacific Ocean including tropics. *Journal of Geophysical* 

Kerminen, V.-M. (2001). Relative roles of secondary sulfate and organics in atmospheric cloud condensation nuclei production. *Journal of Geophysical Research,* Vol. 106, No. D15,

Kerminen, V.-M., Ojanen, C., Pakkanen, T., Hillamo, R., Aurela, M. & Merilaien, J. (2000). Low-molecular-weight dicarboxylic acids in an urban and rural atmosphere. *Journal of* 

Kawamura, K. & Yasui, O. (2005). Diurnal changes in the distribution of dicarboxylic acids,ketocarboxylic acids and dicarbonyls in the urban Tokyo atmosphere. *Atmospheric* 

Kumar, A.V., Patil, R.S. & Nambi, K.S.V. (2001). Source Apportionment of Ambient Particulate Matter at Two Traffic Junctions in Mumbai, India. *Atmospheric Environ*ment,

Kundu, S., Kawamura, K., Andreae, T.W., Hoffer, A. & Andreae, M.O. (2010). Diurnal variation in the water-soluble inorganic ions, organic carbon and isotopic compositions of total carbon and nitrogen in biomass burning aerosols from the LBA-SMOCC campaign in Rondônia, Brazil*. Journal of Aerosol Science*, Vol. 41, No. 1, (January 2010),

Limbeck, A. & Puxbaum, H. (1999). Organic acids in continental background aerosols. *Atmospheric Environment,* Vol. 33, No. 12, (June 1999), pp. 1847–1852, ISSN: 1352-2310

*Research*, Vol. 104, No. D3, (February 1999), pp. 3501–3509, ISSN: 2156–2202

*Aerosol Science*, Vol. 31, No. 3, (March 2000), pp. 349–362, ISSN: 0021-8502

*Environment,* Vol. 39, No. 10, (March 2005), pp. 1945–1960, ISSN: 1352-2310

Vol. 35, No. 25, (September 2001), pp. 4245–4251, ISSN: 1352-2310


forest fires. *Geophysical Research Letters,* Vol. 26, No. 20, (October 1999) pp. 3101–3104, ISSN: 1944–8007

Characteristics of Low-Molecular Weight

Carboxylic Acids in PM2.5 and PM10 Ambient Aerosols From Tanzania 219

Brazil. *Atmospheric Environment,* Vol. 33, No. 16, (July 1999), pp. 2563–2574, ISSN:

Stone, E.A., Schauer, J.J., Pradhan, B.B., Dangol, P.M., Habib, G., Venkataraman, C. & Ramanathan, V. (2010). Characterization of emissions from South Asian biofuels and application to source apportionment of carbonaceous aerosol in the Himalayas. *Journal of Geophysical Research*, Vol. 115, No. D06301, doi:10.1029/2009JD011881 (March 2010),

Streets, D.G., Yarber, K.F., Woo, J.-H. & Carmichael, G.R. (2003). Biomass burning in Asia: Annual and seasonal estimates and atmospheric emissions. *Global Biogeochemical Cycles*,

Talbot, R.W., Andreae, M.O., Berresheim, H., Jacob, D.J. & Beecher, K.M. (1990). Sources and sinks of formic, acetic and pyruvic acids over central Amazonia: 2. Wet deposition. *Journal of Geophysical Research,* Vol. 95, No. D10, (January 1990), pp. 16799–16811, ISSN:

Tanzania Bureau of Standards, TBS (2006). *National Environmental Standards Compendium* 

Turpin, B.J., Saxena, P. & Andrews, E. (2000). Measuring and simulating particulate organics in the atmosphere: problems and prospects. *Atmospheric Environment,* Vol. 34, No. 18,

Van Dingenen, R., Raes, F., Putaud, J.-P., Baltensperger, U., Charron, A., Facchini, M.-C., Decesari, S., Fuzzi, S., Gehrig, R., Hansson, H.-C., Harrison, R.M., Hüglin, C., Jones, A.M., Laj, P., Lorbeer, G., Maenhaut, W., Palmgren, F., Querol, X., Rodriguez, S., Schneider, J., ten Brink, H., Tunved, P., Tørseth, K., Wehner, B., Weingartner, E., Wiedensohler, A. & Wåhlin, P. (2004). A European aerosol phenomenology-1: physical characteristics of particulate matter at kerbside, urban, rural and background sites in Europe. *Atmospheric Environment,* Vol. 38, No. 16, (May), pp. 2561-2577, ISSN:

Warneck, P. (2003). In-cloud chemistry opens pathway to the formation of oxalic acid in the marine atmosphere. *Atmospheric Environment,* Vol. 37, No. 17, (June 2003), pp. 2423–

Yamasoe, M.A., Artaxo, P., Miguel, A.H. & Allen, A.G. (2000). Chemical composition of aerosol particles from direct emissions of vegetation fires in the Amazon Basin: watersoluble species and trace elements. *Atmospheric Environment,* Vol. 34, No. 10, (July 2000),

Yao, X., Fang, M. & Chan, C.K. (2002). Size distributions and formation of dicarboxylic acids in atmospheric particles. *Atmospheric Environment*, Vol. 36, No. 13, (May 2002), pp. 2099–

Yao, X., Fang, M., Chan, C.K. & Hu, M. (2003). Formation and size distribution characteristics of ionic species in atmospheric particulate matter in Beijing, China: (2) dicarboxylic acids. *Atmospheric Environment,* Vol. 37, No. 21, (July 2003), pp. 3001–3007,

Vol. 17, No. 4, (October 2003), pp. 1099–1118, ISSN: 1944–9224

*EMDC 6(1733)*. TZS 845: 2006 Air Quality Specification. p. 74.

(July 2000), pp. 2983–3013, ISSN: 1352-2310

1352-2310

ISSN: 2156–2202

2156–2202

1352-2310

2427, ISSN: 1352-2310

2107, ISSN: 1352-2310

ISSN: 1352-2310

pp. 1641–1653, ISSN: 1352-2310


Brazil. *Atmospheric Environment,* Vol. 33, No. 16, (July 1999), pp. 2563–2574, ISSN: 1352-2310

218 Atmospheric Aerosols – Regional Characteristics – Chemistry and Physics

ISSN: 1944–8007

149–159, ISSN: 1573-2932

pp. 8215–8230, ISSN: 1680-7316

2579-2595, ISSN: 1352-2310

ISBN 0125887507, London

132, ISSN: 0021-8502

(April 1993), pp. 617–625, ISSN: 1520-5851

5851

1352-2310

forest fires. *Geophysical Research Letters,* Vol. 26, No. 20, (October 1999) pp. 3101–3104,

Nicolas, J.F., Galindo, N., Yubero, E., Pastor, C., Esclapez, R. & Crespo, J. (2009). Aerosol Inorganic Ions in a Semiarid Region on the Southeastern Spanish Mediterranean Coast. *Water, Air and Soil Pollution,* Vol. 201, No. 1-4, (July 2009), pp.

Nyanganyura, D., Maenhaut, W., Mathuthu, M., Makarau, A. & Meixner, F.X. (2007). The chemical composition of tropospheric aerosols and their contributing sources to a continental background site in northern Zimbabwe from 1994 to 2000. *Atmospheric* 

Pavuluri, C.M., Kawamura, K., Aggarwal, S.G. & Swaminathan, T. (2011). Characteristics, seasonality and sources of carbonaceous and ionic components in the tropical aerosols from Indian region. *Atmospheric Chemistry and Phys*ics, Vol. 11, No. 15, (August 2011),

Peng, C., Chan, M.N. & Chan, C.K. (2001). The hygroscopic properties of dicarboxylic and multifunctional acids: measurements and UNIFAC predictions. *Environmental Science and Technology,* Vol. 35, No. 22, (November 2001), pp. 4495–4501, ISSN: 1520-

Putaud, J.-P., Raes, F., Van Dingenen, R., Baltensperger, U., Brüggemann, E., Facchini, M.-C., Decesari, S., Fuzzi, S., Gehrig, R., Hüglin, C., Laj, P., Lorbeer, G., Maenhaut, W., Mihalopoulos, N., Müller, K., Querol, X., Rodriguez, S., Schneider, J., Spindler, G., ten Brink, H., Tørseth, K. & Wiedensohler, A. (2004). A European aerosol phenomenology-2: chemical characteristics of particulate matter at kerbside, urban, rural and background sites in Europe. *Atmospheric Environment,* Vol. 38, No. 16, (May 2004), pp.

Ram, K. & Sarin, M.M. (2011). Day and night variability of EC, OC, WSOC and inorganic ions in urban environment of Indo-Gangetic Plain: Implications to secondary aerosol formation. *Atmospheric Environment,* Vol. 45, No. 2, (January 2011), pp. 460–468, ISSN:

Riley, J.P. & Chester, R. (1971). Introduction to Marine Chemistry: 465, Academic Press,

Salma, I., Balashazy, I., Winkler-Heil, R., Hofmann, W. & Zaray, G. (2002). Effect of particle mass size distribution on the deposition of aerosols in the human respiratory system. *Journal of Aerosol Science,* Vol. 33, No. 1, (January 2002), pp. 119-

Scheff, P. & Wadden, R.A. (1993). Receptor modeling of volatile organic compounds: 1. Emission inventory and validation*. Environmental Science and Technology,* Vol. 27, No. 4,

Souza, S.R., Vasconcellos, P.C. & Carvalho, L.R.F. (1999). Low molecular weight carboxylic acids in an urban atmosphere: winter measurements in São Paulo City,

*Environment,* Vol. 41, No. 12, (April 2007), pp. 2644-2659, ISSN: 1352-2310


	- Yu, J., Huang, X., Xu, J. & Hu, M. (2005). When aerosol sulfate goes up, so does oxalate: implication for the formation mechanisms of oxalate. *Environmental Science and Technology,* Vol. 39, No. 1, (January 2005), pp. 128–133, ISSN: 1520-5851

**Chapter 8** 

© 2012 Jiménez-Escalona and Peralta, licensee InTech. This is an open access chapter distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is

distribution, and reproduction in any medium, provided the original work is properly cited.

© 2012 Jiménez-Escalona and Peralta,, licensee InTech. This is a paper distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use,

properly cited.

**Interaction Between Aerosol Particles and** 

**in ITCZ During the EPIC 2001 Project** 

J.C. Jiménez-Escalona and O. Peralta

http://dx.doi.org/10.5772/50249

**1. Introduction** 

residence.

1993 a, b).

Additional information is available at the end of the chapter

**Maritime Convective Clouds: Measurements** 

Atmospheric particles interact directly with solar radiation extinguishing part of it and decreasing the amount of radiation that reaches the Earth's surface. This effect produces a change in the local radiative balance. On the other hand, it also presents an indirect effect on the interaction with radiation because these particles are an important element in the formation and development of clouds influencing their optical properties and the length of

There are studies that have focused primarily on understanding and explaining the role of atmospheric particles in the formation and evolution of clouds. They have shown enough information able to explain those processes in theory (e.g. Pruppacher and Klett, 1997). And they have been validated with experimental works (e.g. Twomey, 1991; Raga and Jonas,

However, other issues of importance that do not yet have much information are the processes that modify the properties of atmospheric particles interacting with the cloud and the effects of changes in the environment. Particles increase their average size in regions of high relative humidity (RH) near the clouds (Baumgardner et al, 1996; Baumgardner and Clarke, 1998). Other studies show that the clouds condensation nuclei (CCN) are relatively higher in regions where a cloud is evaporated compared with places without clouds (DeFelice and Saxena, 1994; DeFelice and Cheng, 1998; Naoki et al, 2001). Also, the composition of atmospheric particles may change resulting from chemical reaction in aqueous state (Hegg et al, 1980; O'Dowd et al, 2000, Alfonso and Raga, 2002). Aerosol particles used as CCN show an increase in size after the cloud drops are evaporated (Hobbs, 1993). Towmey (1974) and Albrecht (1989) showed that changes in particles concentrations
