August Andersson

Associate professor
Room: R509
Phone: +46 8 16 4015
August.Andersson@aces.su.se

About me

Originally trained in Molecular Biosciences, I am since 2009 focusing on research on Environmental and Climate issues. I am currently pursuing two research directions:

 

Carbonaceous Aerosols
Carbon-containing aerosols, e.g., black carbon (BC) affect the climate system and the quality of the air we breathe. However, these effects are currently associated with large uncertainties, e.g., with respect to emission sources and optical properties. In this line of research we are combining isotopic (e.g., D14C and d13C), molecular (e.g., polycyclic aromatic hydrocarbons, PAHs), and physical (e.g., light-absorption and scattering) techniques with the aim to contribute to constraining the emission sources and atmospheric processing of these components, and investigating the coupling between sources/processing and optical properties. Our approach is largely field-based, with ongoing measurements in South and East Asia, the Arctic and Africa, while chemical/isotopic analysis is conducted here at Stockholm University.

 

Source Apportionment Calulation Methodology
In this line of research we focus on developing/implementing statistical/numerical analysis techniques for various Environmental and Geo-applications. Much recent focus has been directed towards characterizing the uncertainties in mass-balance source apportionment calculations, mainly by using Monte Carlo techniques in collaboration with Dr. Martin Sköld at the Department of Mathematics, Stockholm University.

 

News Story

A short clip on our joint sampling campaign, with Dr. Michael Gatari, at the University of Nairobi, Kenya:
http://www.enca.com/africa/find-out-how-traffic-nairobi-bad-your-health

 

R-code (courtesy of Martin Sköld, e-mail: mskold@math.su.se):

Dual isotope Monte Carlo-based source apportionment from Andersson et al., ES&T 49, 2038-2043, doi: 10.1021/es503855e

https://pubs.acs.org/doi/abs/10.1021/es503855e

https://github.com/mskoldSU/Andersson_et_al_2015

 

Dual isotope Monte Carlo-based source apportionment with spline-modeled time-dependence from Keskitalo et al., Clim. Past 13, 1213-1226, doi: 10.5194/cp-13-1213-2017

https://www.clim-past.net/13/1213/2017/

https://github.com/mskoldSU/Keskitalo_et_al

 

14C- bomb spike-resolved Monte Carlo-based source apportionment from Vonk et al., Geochim. Geocosm. Acta 244, 502-521, doi: 10.1016/j.gca.2018.09.034

https://www.sciencedirect.com/science/article/abs/pii/S0016703718305702

https://github.com/mskoldSU/Vonk_et_al_2018

Latest scientific papers

Source quantification of South Asian black carbon aerosols with isotopes and modeling

Sanjeev Dasari; August Andersson; Andreas Stohl; Nikolaos Evangeliou; Srinivas Bikkina; Henry Holmstrand; Krishnakant Budhavant; Abdus Salam; Örjan Gustafsson;
2020 | Environ. Sci. Technol.

Seasonal source variability of carbonaceous aerosols at the Rwanda Climate Observatory

Andersson A; Kirillova EN; Decesari S; DeWitt L; Gasore J; Potter KE; Prinn RG; Rupakheti M; de Dieu Ndikubwimana J; Nkusi J; Safari B
2020 | Atmos. Chem. Phys. | 20 (4561-4573)

Rivers across the Siberian Arctic unearth the patterns of carbon release from thawing permafrost

Wild, B.; Andersson, A.; Bröder, L.; Vonk, J.; Hugelius, G.; McClelland, J.W.; Song, W.; Raymond, P.A.; Gustafsson, Ö.
2019 | Proc. Natl. Acad. Sci. U.S.A. | 116 (21) (10280-10285)

Source apportionment of circum-Arctic atmospheric black carbon from isotopes and modeling

P. Winiger; T. E. Barrett; R. J. Sheesley; L. Huang; S. Sharma; L. A. Barrie; K. E. Yttri; N. Evangeliou; S. Eckhardt; A. Stohl; Z. Klimont; C. Heyes; I. P. Semiletov; O. V. Dudarev; A. Charkin; N. Shakhova; H. Holmstrand; A. Andersson; Ö. Gustafsson
2019 | Sci. Adv. | 5 (2)

Photochemical degradation affects the light absorption of water-soluble brown carbon in the South Asian outflow

Sanjeev Dasari; August Andersson; Srinivas Bikkina; Henry Holmstrand; Krishnakant Budhavant; Sreedharan Satheesh; Eija Asmi; Jutta Kesti; John Backman; Abdus Salam; Deewan Singh Bisht; Suresh Tiwari; Zahid Hameed; Örjan Gustafsson;
2019 | Sci. Adv. | 5, no. 1, eaau8066

All publications

Biogeochemistry

How human activities affect natural processes that drive the major biogeochemical cycles that ultimately govern the composition of the environment.