Search Results - "Van Zyl, Pieter G."

Major secondary aerosol formation in southern African open biomass burning plumes by Vakkari, Ville, Beukes, Johan P., Dal Maso, Miikka, Aurela, Mika, Josipovic, Miroslav, van Zyl, Pieter G.

“…Open biomass burning contributes significantly to air quality degradation and associated human health impacts over large areas. It is one of the largest…”
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Deforestation amplifies climate change effects on warming and cloud level rise in African montane forests by Abera, Temesgen Alemayehu, Heiskanen, Janne, Maeda, Eduardo Eiji, Muhammed, Mohammed Ahmed, Bhandari, Netra, Vakkari, Ville, Hailu, Binyam Tesfaw, Pellikka, Petri K. E., Hemp, Andreas, van Zyl, Pieter G., Zeuss, Dirk

“…Tropical montane forest ecosystems are pivotal for sustaining biodiversity and essential terrestrial ecosystem services, including the provision of…”
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Source apportionment of ambient PM10-2.5 and PM2.5 for the Vaal Triangle, South Africa by Muyemeki, Luckson, Burger, Roelof, Piketti, Stuart J, Language, Brigitte, Beukes, Jotan P, van Zyl, Pieter G

“…The Vaal Triangle Airshed Priority Area (VTAPA), like other priority areas in South Africa, has an air pollution problem. Understanding the sources…”
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Co-Carbonization of Discard Coal with Waste Polyethylene Terephthalate towards the Preparation of Metallurgical Coke by Bambalaza, Sonwabo E, Xakalashe, Buhle S, Coetsee, Yolindi, van Zyl, Pieter G, Dyosiba, Xoliswa L, Musyoka, Nicholas M, Steenkamp, Joalet D

“…Waste plastics such as polyethylene terephthalate (w-PET) and stockpiled discard coal (d-coal) pose a global environmental threat as they are disposed of in…”
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An Overview of Currently Applied Ferrochrome Production Processes and Their Waste Management Practices by Stephanus P. du Preez, Tristan P. M. van Kaam, Eli Ringdalen, Merete Tangstad, Kazuki Morita, Dmitri G. Bessarabov, Pieter G. van Zyl, Johan P. Beukes

“…Ferrochrome (FeCr) is the main source of virgin chromium (Cr) units used in modern-day chromium (Cr) containing alloys. The vast majority of produced Cr is…”
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Temporal and source assessments of organic and elemental carbon at sites in the northern South African interior by Maritz, Petra, Beukes, Johan P., van Zyl, Pieter G., Liousse, Catherine, Gardrat, Eric, Ramandh, Avishkar, Mkhatshwa, Gabisile V.

“…Particulate matter (PM) can affect climate, air quality, human health, acid deposition and visibility, and contain a significant fraction of organic (OC) and…”
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Characterising Particulate Organic Nitrogen at A Savannah-Grassland Region in South Africa by Booyens, Wanda, Van Zyl, Pieter G., Beukes, Johan P., Ruiz-Jimenez, Jose, Kopperi, Matias, Riekkola, Marja-Liisa, Vakkari, Ville, Josipovic, Miroslav, Kulmala, Markku, Laakso, Lauri

“…Although atmospheric organic N compounds are considered to be important, especially in new particle formation and their contribution to brown carbon, these…”
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Key challenges for tropospheric chemistry in the Southern Hemisphere by Paton-Walsh, Clare, Emmerson, Kathryn M., Garland, Rebecca M., Keywood, Melita, Hoelzemann, Judith J., Huneeus, Nicolás, Buchholz, Rebecca R., Humphries, Ruhi S., Altieri, Katye, Schmale, Julia, Wilson, Stephen R., Labuschagne, Casper, Kalisa, Egide, Fisher, Jenny A., Deutscher, Nicholas M., van Zyl, Pieter G., Beukes, Johan P., Joubert, Warren, Martin, Lynwil, Mkololo, Thumeka, Barbosa, Cybelli, de Fatima Andrade, Maria, Schofield, Robyn, Mallet, Marc D., Harvey, Mike J., Formenti, Paola, Piketh, Stuart J., Olivares, Gustavo

“…This commentary paper from the recently formed International Global Atmospheric Chemistry (IGAC) Southern Hemisphere Working Group outlines key issues in…”
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Investigating atmospheric photochemistry in the Johannesburg-Pretoria megacity using a box model by Lourens, Alexandra S M, Butler, Tim M, Beukes, J Paul, van Zyl, Pieter G, Fourie, Gerhard D, Lawrence, Mark G

“…Urban air pollution has become a major concern over the past decades. One of the largest conurbations in Sub-Saharan Africa is developed around the cities of…”
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Aerosol characterisation including oxidative potential as a proxy of health impact by Josipovic, Miroslav, Leal-Liousse, Catherine, Crobeddu, Belinda, Baeza-Squiban, Armelle, Segakweng, C. Keitumetse, Galy-Lacaux, Corinne, Beukes, J. Paul, Van Zyl, Pieter G., Fourie, Gerhard

“…This study aimed to characterise aerosols sampled in the vicinity of a major industrialised area, i.e. the Vaal Triangle. It included thedetermination of…”
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Assessment of atmospheric trace metals in the Western Bushveld igneous complex, South Africa by van Zyl, Pieter G, Beukes, Johan P, du Toit, Grizelda, Mabaso, Desmond, Hendriks, Johan, Vakkari, Ville, Tiitta, Petri, Pienaar, Jacobus J, Kulmala, Markku, Laakso, Lauri

“…Trace metal species emitted into the atmosphere from natural and anthropogenic sources can cause various health-related and environmental problems. Limited…”
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Summary of research paper published in Journal of Atmospheric Chemistry titled: Assessment of polar organic aerosols at a regional background site in southern Africa by Booyens, Wanda, Beukes, Johan P, Van Zyl, Pieter G, Ruiz-Jimenez, Jose, Kopperi, Matias, Riekkola, Marja-Liisa, Josipovic, Miroslav, Vakkari, Ville, Laakso, Lauri

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Optical and microphysical characterization of aerosol layers over South Africa by means of multi-wavelength depolarization and Raman lidar measurements by Giannakaki, Elina, van Zyl, Pieter G, Müller, Detlef, Balis, Dimitris, Komppula, Mika

“…Optical and microphysical properties of different aerosol types over South Africa measured with a multi-wavelength polarization Raman lidar are presented. This…”
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Rainwater Chemistry and Total Deposition of Acidity from the Northern Savanna to the Southern Coastal Fynbos of South Africa by Mompati, Mpho K., Piketh, Stuart J., Aas, Wenche, Van Zyl, Pieter G., Pienaar, Jacobus J., Curtis, Christopher J.

“…South Africa is the largest national source of industrial atmospheric pollutants in Africa, and the emission of acid-forming pollutants occurs mainly in the…”
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Free Tropospheric Aerosols Over South Africa by Elina, Giannakaki, Pfüller, Anne, Korhonen, Kimmo, Mielonen, Tero, Laakso, Lauri, Vakkari, Ville, Baars, Holger, Engelmann, Ronny, Beukes, Johan P., Van Zyl, Pieter G., Josipovic, Miroslav, Tiitta, Petri, Chiloane, Kgaugelo, Piketh, Stuart, Lihavainen, Heikki, Lehtinen, Kari

“…Raman lidar data of one year was been analyzed to obtain information relating aerosol layers in the free troposphere over South Africa, Elandsfontein. In…”
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Atmospheric trace metals measured at a regional background site (Welgegund) in South Africa by Venter, Andrew D, van Zyl, Pieter G, Beukes, Johan P, Josipovic, Micky, Hendriks, Johan, Vakkari, Ville, Laakso, Lauri

“…Atmospheric trace metals can cause a variety of health-related and environmental problems. Only a few studies on atmospheric trace metal concentrations have…”
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The effect of rainfall amount and timing on annual transpiration in a grazed savanna grassland by Räsänen, Matti, Aurela, Mika, Vakkari, Ville, Beukes, Johan P, Tuovinen, Juha-Pekka, Van Zyl, Pieter G, Josipovic, Miroslav, Siebert, Stefan J, Laurila, Tuomas, Kulmala, Markku, Laakso, Lauri, Rinne, Janne, Oren, Ram, Katul, Gabriel

“…The role of precipitation (P) variability with respect to evapotranspiration (ET) and its two components, transpiration (T) and evaporation (E), from savannas…”
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Measurement report: Statistical modelling of long-term trends of atmospheric inorganic gaseous species within proximity of the pollution hotspot in South Africa by Swartz, Jan-Stefan, van Zyl, Pieter G, Beukes, Johan P, Galy-Lacaux, Corinne, Ramandh, Avishkar, Pienaar, Jacobus J

“…South Africa is considered an important source region of atmospheric pollutants, which is compounded by high population and industrial growth. However, this…”
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Measurement report: Size-resolved chemical characterisation of aerosols in low-income urban settlements in South Africa by Segakweng, Constance K, van Zyl, Pieter G, Liousse, Cathy, Beukes, Johan P, Swartz, Jan-Stefan, Gardrat, Eric, Dias-Alves, Maria, Language, Brigitte, Burger, Roelof P, Piketh, Stuart J

“…Naturally and anthropogenically emitted aerosols, which are determined by their physical and chemical properties, have an impact on both air quality and the…”
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Reevaluating the contribution of sulfuric acid and the origin of organic compounds in atmospheric nanoparticle growth by Vakkari, Ville, Tiitta, Petri, Jaars, Kerneels, Croteau, Philip, Beukes, Johan Paul, Josipovic, Miroslav, Kerminen, Veli-Matti, Kulmala, Markku, Venter, Andrew D., van Zyl, Pieter G., Worsnop, Douglas R., Laakso, Lauri

“…Aerosol particles formed in the atmosphere are important to the Earth's climate system due to their ability to affect cloud properties. At present, little is…”
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