Christer Johansson

Prof. Christer Johansson

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Research Focus & Metrics

Academic Career Length

44Years (1983-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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15 February 2002 in Environmental Health Perspectives
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Journal Article
Open access
CBCarl-Elis Boström
Carl-Elis Boström
PGPer Gerde
Per Gerde
AHAnnika Hanberg
Annika Hanberg
BJBengt Jernström
Bengt Jernström
CJChrister Johansson
Christer Johansson
RWRoger Westerholm
Roger Westerholm

1 October 2009 in Atmospheric Environment
Verified
Journal Article
Closed access
CJChrister Johansson
Christer Johansson
MNMichael Norman
Michael Norman
LBLars Burman
Lars Burman

15 June 2015 in Atmospheric Chemistry and Physics
Verified
Journal Article
Open access
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HGH. A. C. Denier van der Gon
H. A. C. Denier van der Gon
RBR. Bergström
R. Bergström
CFChristos Fountoukis
Christos Fountoukis
CJChrister Johansson
Christer Johansson
SPS. N. Pandis
S. N. Pandis
AVA. J. H. Visschedijk
A. J. H. Visschedijk
Currently residential wood combustion (RWC) is increasing in Europe because of rising fossil fuel prices but also due to climate change mitigation policies. However, especially in small-scale applications, RWC may cause high emissions of particulate matter (PM). Recently we have developed a new high-resolution (7 × 7 km) anthropogenic carbonaceous aerosol emission inventory for Europe. The inventory indicated that about half of the total PM2.5 emission in Europe is carbonaceous aerosol and identified RWC as the largest organic aerosol source in Europe. The inventory was partly based on national reported PM emissions. Use of this organic aerosol inventory as input for two chemical transport models (CTMs), PMCAMx and EMEP MSC-W, revealed major underestimations of organic aerosol in winter time, especially for regions dominated by RWC. Interestingly, this was not universal but appeared to differ by country. In the present study we constructed a revised bottom-up emission inventory for RWC accounting for the semivolatile components of the emissions. The revised RWC emissions are higher than those in the previous inventory by a factor of 2–3 but with substantial inter-country variation. The new emission inventory served as input for the CTMs and a substantially improved agreement between measured and predicted organic aerosol was found. The revised RWC inventory improves the model-calculated organic aerosol significantly. Comparisons to Scandinavian source apportionment studies also indicate substantial improvements in the modelled wood-burning component of organic aerosol. This suggests that primary organic aerosol emission inventories need to be revised to include the semivolatile organic aerosol that is formed almost instantaneously due to dilution and cooling of the flue gas or exhaust. Since RWC is a key source of fine PM in Europe, a major revision of the emission estimates as proposed here is likely to influence source–receptor matrices and modelled source apportionment. Since usage of biofuels in small combustion units is a globally significant source, the findings presented here are also relevant for regions outside of Europe.

1 October 2002 in Atmospheric Environment
Verified
Journal Article
Closed access
EHEmma Hedberg
Emma Hedberg
AKAdam Kristensson
Adam Kristensson
MOMichael Ohlsson
Michael Ohlsson
CJChrister Johansson
Christer Johansson
PJPer-Åke Johansson
Per-Åke Johansson
RWRoger Westerholm
Roger Westerholm

15 July 2010 in Science of The Total Environment
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Journal Article
Closed access
FAFulvio Amato
Fulvio Amato
XQXavier Querol
Xavier Querol
CJChrister Johansson
Christer Johansson
CNC. Nagl
C. Nagl
Andrés Alastuey UrósAndrés Alastuey Urós
Andrés Alastuey Urós

1 February 2004 in Atmospheric Environment
Verified
Journal Article
Closed access
AKAdam Kristensson
Adam Kristensson
CJChrister Johansson
Christer Johansson
RWRoger Westerholm
Roger Westerholm
ESErik Swietlicki
Erik Swietlicki
LGLars Gidhagen
Lars Gidhagen
VVVaclav Vesely
Vaclav Vesely