G. Helas

1.8k total citations
21 papers, 776 citations indexed

About

G. Helas is a scholar working on Atmospheric Science, Global and Planetary Change and Health, Toxicology and Mutagenesis. According to data from OpenAlex, G. Helas has authored 21 papers receiving a total of 776 indexed citations (citations by other indexed papers that have themselves been cited), including 17 papers in Atmospheric Science, 11 papers in Global and Planetary Change and 5 papers in Health, Toxicology and Mutagenesis. Recurrent topics in G. Helas's work include Atmospheric chemistry and aerosols (17 papers), Atmospheric aerosols and clouds (9 papers) and Atmospheric Ozone and Climate (6 papers). G. Helas is often cited by papers focused on Atmospheric chemistry and aerosols (17 papers), Atmospheric aerosols and clouds (9 papers) and Atmospheric Ozone and Climate (6 papers). G. Helas collaborates with scholars based in Germany, South Africa and Denmark. G. Helas's co-authors include Meinrat O. Andreae, Yoshiteru Iinuma, Hartmut Herrmann, Rahul Parmar, K. Müller, E. Brüggemann, T. Gnauk, Stuart Piketh, Heike Wex and Stephan Weinbruch and has published in prestigious journals such as Journal of Geophysical Research Atmospheres, Geophysical Research Letters and Atmospheric chemistry and physics.

In The Last Decade

G. Helas

21 papers receiving 711 citations

Peers

G. Helas

GPC

HTM

R. Elleman United States

Ho‐Chun Huang United States

Anna L. Hodshire United States

M. Mircea Italy

Suresh K. R. Boreddy Japan

Chris Lunder Norway

A. G. Wollny United States

J.‐L. Jaffrezo France

Bhagawati Kunwar Japan

Matson A. Pothier United States

R. Elleman United States

G. Helas

660 ×0.9

608 ×1.2

GPC

255 ×0.8

HTM

127 ×1.8

46 ×0.9

Citations per year, relative to G. Helas G. Helas (= 1×) peers R. Elleman

Countries citing papers authored by G. Helas

Since Specialization

Citations

This map shows the geographic impact of G. Helas's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by G. Helas with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites G. Helas more than expected).

Fields of papers citing papers by G. Helas

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by G. Helas. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by G. Helas. The network helps show where G. Helas may publish in the future.

Co-authorship network of co-authors of G. Helas

This figure shows the co-authorship network connecting the top 25 collaborators of G. Helas. A scholar is included among the top collaborators of G. Helas based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with G. Helas. G. Helas is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Dusek, Ulrike, G. P. Frank, Andreas Maßling, et al.. (2011). Water uptake by biomass burning aerosol at sub- and supersaturated conditions: closure studies and implications for the role of organics. Atmospheric chemistry and physics. 11(18). 9519–9532. 54 indexed citations

Iinuma, Yoshiteru, E. Brüggemann, T. Gnauk, et al.. (2007). Source characterization of biomass burning particles: The combustion of selected European conifers, African hardwood, savanna grass, and German and Indonesian peat. Journal of Geophysical Research Atmospheres. 112(D8). 274 indexed citations

Chand, D., Otmar Schmid, Patience Gwaze, et al.. (2005). Laboratory measurements of smoke optical properties from the burning of Indonesian peat and other types of biomass - article no. L12819. Geophysical Research Letters. 32(12). 7 indexed citations

Schnaiter, Martin, Otmar Schmid, Andreas Petzold, et al.. (2005). Measurement of Wavelength-Resolved Light Absorption by Aerosols Utilizing a UV-VIS Extinction Cell. Aerosol Science and Technology. 39(3). 249–260. 84 indexed citations

Formenti, Paola, et al.. (2002). Aerosol optical depth over a remote semi-arid region of South Africa from spectral measurements of the daytime solar extinction and the nighttime stellar extinction. Atmospheric Research. 62(1-2). 11–32. 29 indexed citations

Wurzler, S., Hartmut Herrmann, Christian Neusüß, et al.. (2001). IMPACT OF VEGETATION FIRES ON THE COMPOSITION AND CIRCULATION OF THE ATMOSPHERE: INTRODUCTION OF THE RESEARCH PROJECT EFEU. Journal of Aerosol Science. 32. 199–200. 8 indexed citations

Tyson, Peter, et al.. (2001). Characterization and transport of aerosols over equatorial eastern Africa. Global Biogeochemical Cycles. 15(3). 663–672. 20 indexed citations

Ebert, Martin, et al.. (2001). The complex refractive index of aerosols during LACE 98 as derived from the analysis of individual particles. Journal of Aerosol Science. 32. 683–684. 9 indexed citations

Trautmann, Thomas, et al.. (2001). CALCULATION OF SCATTERING AND ABSORPTION OF LIGHT BY IRREGULAR SHAPED AND MIXED PARTICLES. Journal of Aerosol Science. 32. 419–420. 1 indexed citations

10.

Kirkman, G. A., Stuart Piketh, Meinrat O. Andreae, H.J. Annegarn, & G. Helas. (2000). Distribution of aerosols, ozone and carbon monoxide over southern Africa. Max Planck Institute for Plasma Physics. 96. 423–432. 15 indexed citations

11.

Ebert, M., et al.. (1999). High-resolution scanning electron microscopy of individual aerosol particles obtained during LACE 98. Journal of Aerosol Science. 30. S515–S516. 1 indexed citations

12.

Tyson, Peter, et al.. (1999). A seasonal air transport climatology for Kenya. Journal of Geophysical Research Atmospheres. 104(D12). 14237–14244. 27 indexed citations

13.

Annegarn, H.J., et al.. (1996). Airborne streaker sampling for PIXE analysis. Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms. 109-110. 548–550. 10 indexed citations

14.

Bingemer, Heinz, Meinrat O. Andreae, T. W. Andreae, et al.. (1992). Sulfur gases and aerosols in and above the equatorial African rain forest. Journal of Geophysical Research Atmospheres. 97(D6). 6207–6217. 31 indexed citations

15.

Cros, B., J. Fontan, A. Minga, et al.. (1992). Vertical profiles of ozone between 0 and 400 meters in and above the African equatorial forest. Journal of Geophysical Research Atmospheres. 97(D12). 12877–12887. 21 indexed citations

16.

Andreae, Meinrat O., Arnaud Chapuis, B. Cros, et al.. (1992). Ozone and Aitken nuclei over equatorial Africa: Airborne observations during DECAFE 88. Journal of Geophysical Research Atmospheres. 97(D6). 6137–6148. 79 indexed citations

17.

Wilson, Scott R., G. Schuster, & G. Helas. (1989). Measurements of COFCl and COCl 2 Near the Tropopause. 302. 2 indexed citations

18.

Helas, G., Meinrat O. Andreae, J. Fontan, B. Cros, & R. Delmas. (1989). Ozone Measurements in Equatorial Africa During DECAFE 88. Max Planck Institute for Plasma Physics. 430. 2 indexed citations

19.

Helas, G., et al.. (1981). Improved NO_x Monitor for Measurements in Tropospheric Clean Air Regions. International Journal of Environmental & Analytical Chemistry. 10(2). 155–166. 13 indexed citations

20.

Helas, G., P. Hoffmann, & K. Bächmann. (1978). Investigation of the influence of some experimental parameters on the position of the deposition zone in a temperature-gradient tube. Journal of Radioanalytical and Nuclear Chemistry. 47(1-2). 159–172. 1 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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