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South African EUCAARI measurements: seasonal variation of trace gases and aerosol optical properties

Beukes, Johan Paul; Josipovic, Miroslav; Laakso, L.; Pienaar, Jacobus Johannes; Van Zyl, Pieter Gideon; Tiitta, P. (Copernicus Publications, 2012)

In this paper we introduce new in situ observations of atmospheric aerosols, especially chemical composition, physical and optical properties, on the eastern brink of the heavily polluted Highveld area in South Africa. ...
General overview: European integrated project on Aerosol Cloud Climate and Air Quality Interactions (EUCAARI) – integrating aerosol research from nano to global scales.:

Beukes, Johan Paul; Josipovic, Miroslav; Laakso, L.; Pienaar, Jacobus Johannes; Van Zyl, Pieter Gideon; Kulmala, M. (Copernicus Publications, 2011)

In this paper we describe and summarize the main achievements of the European Aerosol Cloud Climate and Air Quality Interactions project (EUCAARI). EUCAARI started on 1 January 2007 and ended on 31 December 2010 leaving a ...
Characterisation of sub-micron particle number concentrations and formation events in the western Bushveld Igneous Complex, South Africa

Beukes, Johan Paul; Hirsikko, A.; Laakso, L.; Vakkari, V.; Tiitta, P. (Copernicus Publications, 2012)

South Africa holds significant mineral resources, with a substantial fraction of these reserves occurring and being processed in a large geological structure termed the Bushveld Igneous Complex (BIC). The area is also ...
Modelling heliospheric current sheet drift in stochastic cosmic ray transport models

Kopp, Andreas; Potgieter, Marthinus Steenkamp; Strauss, Roelf du Toit; Büsching, Ingo (Springer, 2012)

Drifts are one of the major cosmic ray modulation mechanisms in the heliosphere. Three types of drifts occur in the background heliospheric magnetic field, namely curvature, gradient and current sheet drifts. The last ...
Veritas observations of six bright, hard-spectrum fermi-LAT blazars

Aliu, E.; Archambault, S.; Arlen, T.; Aune, T.; Böttcher, Markus (IOP publising, 2012)

We report on VERITAS very high energy (VHE; E ⩾ 100 GeV) observations of six blazars selected from the Fermi Large Area Telescope First Source Catalog (1FGL). The gamma-ray emission from 1FGL sources was extrapolated up ...
Three-dimensional wavy heliospheric current sheet drifts

Burger, Renier Adriaan; Clem, J.; Pei, C.; Bieber, J.W. (IOP publishing, 2012)

We present an analytic method to determine the directions of the three-dimensional (3D) heliospheric current sheet (HCS) drift for any tilt angle based on Parker's heliospheric magnetic field and compare it with published ...