Annual Progress Report
CLEO 2013
Project
2.1 Atmospheric dispersion of air pollutants in a changing climate
Project leader:
Magnuz Engardt (magnuz.engardt@smhi.se)
SMHI, 601 76 Norrköping
General Objective:
To study the extent of air pollution and deposition of eutrophying and acidifying species in the
future when emissions and climate are different. In the project we focus on (1) particulate matter in
background air, (2) deposition of sulphur and nitrogen containing species and (3) near-surface
ozone.
Short description of activities 2013:
The MATCH model is being updated to handle secondary organic aerosol (SOA) formation from
both anthropogenic and biogenic sources. The development is closely connected to the (EMEP)
model development work done within the SCARP project. Earlier MATCH-versions for Europe used
simple land-use descriptions with a small number of vegetation classes (essentially forest, low
vegetation and water surfaces; combined with national statistics for the forest cover of some tree
species to estimate biogenic isoprene emissions) and a simple, parameterised, resistance scheme
for dry deposition to the different land-use classes. As part of the CLEO work the land use
description and dry deposition scheme in MATCH has been updated to allow a more realistic
description of the deposition and emissions of biogenic VOC.
Biogenic SOA-forming VOC emissions include monoterpenes and isoprene but the influence of
biotic stress-induced emissions of other VOCs (e.g., sesquiterpenes and methyl salicylate) on SOAformation, both under present-day climate conditions and in the future, are also being
investigated (Bergström et al., 2014).
Anthropogenic emissions also contribute to carbonaceous aerosol; both fossil fuel sources (e.g.,
traffic emissions) and wood combustion can contribute substantially to organic aerosol and
elemental carbon (e.g., Bergström et al., 2012; Genberg et al., 2013). Earlier MATCH-versions only
handled primary OA but the model being introduced in CLEO treats SOA formation both from
VOCs and from emissions of intermediate volatility organic compounds (IVOC).
Calculations of the deposition of sulphur and nitrogen containing species for the period 1961-2099
have been completed and delivered to effect modellers within CLEO. The work included
painstaking efforts to combine the non-gridded CLEO baseline emissions for the period 2000-2030
with other data to generate a continuous, documented series of emissions over Europe and
adjacent waters.
Deliverables 2013:
Gridded depositions of sulphur and nitrogen components. Final version delivered 29 January 2014.
Additional staff involved in project:
Joakim Langner (SMHI), Camilla Andersson (SMHI), Robert Bergström (SMHI, GU), Mattias
Hallquist (GU).
Co-operation outside CLEO:
The current project benefits from the strong links with other research projects dealing with the
connection between climate change and European air quality. Particularly, ENSCLIM funded by the
Nordic Council of Ministers (project no: KoL-10-04) and the EU FP7 projects ECLAIRE (project no:
282910) and IMPACT2C (project no: 282746). We also collaborate closely with EMEP and MSCW, both in terms of model development and the generation of gridded emissions needed for the
modelling.
Reports and publications:
Bergström, R., Denier van der Gon, H. A. C., Prévôt, A. S. H., Yttri, K. E., and Simpson, D.:
Modelling of organic aerosols over Europe (2002–2007) using a volatility basis set (VBS)
framework: application of different assumptions regarding the formation of secondary organic
aerosol, Atmos. Chem. Phys., 12, 8499-8527, doi:10.5194/acp-12-8499-2012, 2012
Bergström, R., Hallquist, M., Simpson, D., Wildt, J., and Mentel, Th. F.: Biotic stress: a significant
contributor to organic aerosol in Europe?, In preparation, 2014.
Engardt, M. and Langner, J. Simulations of future sulphur and nitrogen deposition over Europe
using meteorological data from three regional climate projections. Tellus B, 65, 20348,
http://dx.doi.org/10.3402/tellusb.v65i0.20348. 2013.
Genberg, J., Denier van der Gon, H. A. C., Simpson, D., Swietlicki, E., Areskoug, H., Beddows, D.,
Ceburnis, D., Fiebig, M., Hansson, H. C., Harrison, R. M., Jennings, S. G., Saarikoski, S., Spindler,
G., Visschedijk, A. J. H., Wiedensohler, A., Yttri, K. E., and Bergström, R.: Light-absorbing carbon
in Europe – measurement and modelling, with a focus on residential wood combustion emissions,
Atmos. Chem. Phys., 13, 8719-8738, doi:10.5194/acp-13-8719-2013, 2013.
Klingberg, J., Engardt, M., Karlsson, P.E., Langner, J. and Pleijel, H. Declining risk of ozone
impacts on vegetation in Europe 1990–2050 due to reduced precursor emissions in a changed
climate. Biogeosciences Discuss. 11, 625–655. doi:10.5194/bgd-11-625-2014. 2014
Orru, H., Andersson, C., Ebi, K.L., Langner, J., Åström, C. and Forsberg, B. Impact of climate
change on ozone-related mortality and morbidity in Europe. Eur. Respir. J., 41, 285-294.
DOI:10.1183/09031936.00210411. 2013.
Oral presentations:
C Andersson and Manu Thomas 5 Juni 2013. BBCC SMHI.
Air Quality Research at SMHI Related to Climate Change and possible collaborations with the Bolin
Centre
C. Andersson 25 sept 2013. HÄMI, Lund, (hälsoinriktad miljöövervakning)
ACCEPTED-projektet och resultat från andra Europeiska studier.