Zobrazeno 1 - 10
of 110
pro vyhledávání: '"P. G. Van Zyl"'
Autor:
M. Räsänen, M. Aurela, V. Vakkari, J. P. Beukes, J.-P. Tuovinen, P. G. Van Zyl, M. Josipovic, S. J. Siebert, T. Laurila, M. Kulmala, L. Laakso, J. Rinne, R. Oren, G. Katul
Publikováno v:
Hydrology and Earth System Sciences, Vol 26, Pp 5773-5791 (2022)
The role of precipitation (P) variability with respect to evapotranspiration (ET) and its two components, transpiration (T) and evaporation (E), from savannas continues to draw significant research interest given its relevance to a number of ecohydro
Externí odkaz:
https://doaj.org/article/33bdf81467514ca6beb7bf84599a2bc7
Autor:
C. K. Segakweng, P. G. van Zyl, C. Liousse, J. P. Beukes, J.-S. Swartz, E. Gardrat, M. Dias-Alves, B. Language, R. P. Burger, S. J. Piketh
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 10291-10317 (2022)
Naturally and anthropogenically emitted aerosols, which are determined by their physical and chemical properties, have an impact on both air quality and the radiative properties of the earth. An important source of atmospheric particulate matter (PM)
Externí odkaz:
https://doaj.org/article/1a4c008450b44c858f178aa2504c2202
Autor:
C. Rose, M. Collaud Coen, E. Andrews, Y. Lin, I. Bossert, C. Lund Myhre, T. Tuch, A. Wiedensohler, M. Fiebig, P. Aalto, A. Alastuey, E. Alonso-Blanco, M. Andrade, B. Artíñano, T. Arsov, U. Baltensperger, S. Bastian, O. Bath, J. P. Beukes, B. T. Brem, N. Bukowiecki, J. A. Casquero-Vera, S. Conil, K. Eleftheriadis, O. Favez, H. Flentje, M. I. Gini, F. J. Gómez-Moreno, M. Gysel-Beer, A. G. Hallar, I. Kalapov, N. Kalivitis, A. Kasper-Giebl, M. Keywood, J. E. Kim, S.-W. Kim, A. Kristensson, M. Kulmala, H. Lihavainen, N.-H. Lin, H. Lyamani, A. Marinoni, S. Martins Dos Santos, O. L. Mayol-Bracero, F. Meinhardt, M. Merkel, J.-M. Metzger, N. Mihalopoulos, J. Ondracek, M. Pandolfi, N. Pérez, T. Petäjä, J.-E. Petit, D. Picard, J.-M. Pichon, V. Pont, J.-P. Putaud, F. Reisen, K. Sellegri, S. Sharma, G. Schauer, P. Sheridan, J. P. Sherman, A. Schwerin, R. Sohmer, M. Sorribas, J. Sun, P. Tulet, V. Vakkari, P. G. van Zyl, F. Velarde, P. Villani, S. Vratolis, Z. Wagner, S.-H. Wang, K. Weinhold, R. Weller, M. Yela, V. Zdimal, P. Laj
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 17185-17223 (2021)
Aerosol particles are a complex component of the atmospheric system which influence climate directly by interacting with solar radiation, and indirectly by contributing to cloud formation. The variety of their sources, as well as the multiple transfo
Externí odkaz:
https://doaj.org/article/93e4ecf90c694fdbb5b7d15408614ff0
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 10637-10665 (2020)
South Africa is considered an important source region of atmospheric pollutants, which is compounded by high population and industrial growth. However, this region is understudied, especially with regard to evaluating long-term trends of atmospheric
Externí odkaz:
https://doaj.org/article/1b6acf376d534391a67cde98cee2d3e7
Publikováno v:
Atmospheric Measurement Techniques, Vol 12, Pp 839-852 (2019)
Commercially available Doppler lidars have now been proven to be efficient tools for studying winds and turbulence in the planetary boundary layer. However, in many cases low signal-to-noise ratio is still a limiting factor for utilising measurements
Externí odkaz:
https://doaj.org/article/6beecb2d4a714cc299e73433fb3f6abc
Autor:
T. L. Laban, P. G. van Zyl, J. P. Beukes, V. Vakkari, K. Jaars, N. Borduas-Dedekind, M. Josipovic, A. M. Thompson, M. Kulmala, L. Laakso
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 15491-15514 (2018)
Although elevated surface ozone (O3) concentrations are observed in many areas within southern Africa, few studies have investigated the regional atmospheric chemistry and dominant atmospheric processes driving surface O3 formation in this region.
Externí odkaz:
https://doaj.org/article/b8c33b7bfe32425896b6b9d4c395789e
Autor:
K. E. Chiloane, J. P. Beukes, P. G. van Zyl, P. Maritz, V. Vakkari, M. Josipovic, A. D. Venter, K. Jaars, P. Tiitta, M. Kulmala, A. Wiedensohler, C. Liousse, G. V. Mkhatshwa, A. Ramandh, L. Laakso
Publikováno v:
Atmospheric Chemistry and Physics, Vol 17, Iss 10, Pp 6177-6196 (2017)
After carbon dioxide (CO2), aerosol black carbon (BC) is considered to be the second most important contributor to global warming. This paper presents equivalent black carbon (eBC) (derived from an optical absorption method) data collected from three
Externí odkaz:
https://doaj.org/article/2a5930b104734b2ea9d6db9362801fb5
Autor:
M. Räsänen, M. Aurela, V. Vakkari, J. P. Beukes, J.-P. Tuovinen, P. G. Van Zyl, M. Josipovic, A. D. Venter, K. Jaars, S. J. Siebert, T. Laurila, J. Rinne, L. Laakso
Publikováno v:
Biogeosciences, Vol 14, Iss 5, Pp 1039-1054 (2017)
Tropical savannas and grasslands are estimated to contribute significantly to the total primary production of all terrestrial vegetation. Large parts of African savannas and grasslands are used for agriculture and cattle grazing, but the carbon flux
Externí odkaz:
https://doaj.org/article/25dc01972d0445ea9372eed75ebc282c
Publikováno v:
Atmospheric Chemistry and Physics, Vol 17, Iss 6, Pp 4251-4263 (2017)
Atmospheric trace metals can cause a variety of health-related and environmental problems. Only a few studies on atmospheric trace metal concentrations have been conducted in South Africa. Therefore the aim of this study was to determine trace metal
Externí odkaz:
https://doaj.org/article/89a73d053ca44883acd52cdea954a677
Autor:
K. Jaars, P. G. van Zyl, J. P. Beukes, H. Hellén, V. Vakkari, M. Josipovic, A. D. Venter, M. Räsänen, L. Knoetze, D. P. Cilliers, S. J. Siebert, M. Kulmala, J. Rinne, A. Guenther, L. Laakso, H. Hakola
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 15665-15688 (2016)
Biogenic volatile organic compounds (BVOCs) play an important role in the chemistry of the troposphere, especially in the formation of tropospheric ozone (O3) and secondary organic aerosols (SOA). Ecosystems produce and emit a large number of BVOC
Externí odkaz:
https://doaj.org/article/dc37818828d449aeb3535639b7118b0b