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  • 1.
    Amorim, Jorge Humberto
    et al.
    SMHI, Research Department, Air quality.
    Asker, Christian
    SMHI, Research Department, Air quality.
    Belusic, Danijel
    SMHI, Research Department, Climate research - Rossby Centre.
    Carvalho, Ana
    SMHI, Research Department, Air quality.
    Engardt, Magnuz
    SMHI, Research Department, Air quality.
    Gidhagen, Lars
    SMHI, Research Department, Air quality.
    Hundecha, Yeshewatesfa
    SMHI, Research Department, Hydrology.
    Körnich, Heiner
    SMHI, Research Department, Meteorology.
    Lind, Petter
    SMHI, Research Department, Climate research - Rossby Centre.
    Olsson, Esbjörn
    SMHI, Research Department, Meteorology.
    Olsson, Jonas
    SMHI, Research Department, Hydrology.
    Segersson, David
    SMHI, Research Department, Air quality.
    Strombäck, Lena
    SMHI, Research Department, Hydrology.
    Joe, Paul
    Baklanov, Alexander
    Integrated Urban Services for European cities: the Stockholm case2018In: WMO Bulletin, ISSN 0042-9767, Vol. 67, no 2, p. 33-40Article in journal (Refereed)
  • 2.
    Andersson, Camilla
    et al.
    SMHI, Research Department, Air quality.
    Andersson, Stefan
    SMHI, Research Department, Air quality.
    Langner, Joakim
    SMHI, Research Department, Air quality.
    Segersson, David
    SMHI, Research Department, Air quality.
    Halter och deposition av luftföroreningar: Förändring över Sverige från 2010 till 2020 i bidrag från Sverige, Europa och Internationell Sjöfart2011Report (Other academic)
    Abstract [sv]

    I denna studie presenteras nutid (2010) och förändring till framtid (2020) för ett emissionsscenario baserat på PRIMES energimodell och IMO-beslut för internationell sjöfart. Utifrån dessa uppskattningar har modellberäkningar gjorts över nutid och förändring till 2020 för deposition av kväve och svavel, samt för lufthalter av sekundära inorganiska aerosoler (SIA; partiklar) och marknära ozon. Bidrag och förändring i detta bidrag till 2020 har presenterats för internationell sjöfart. Även Sveriges och övriga Europas bidrag till deposition i nutid och förändring till framtid har presenterats.Huvudresultaten i studien är:- Landbaserade utsläpp av svaveldioxid, kväveoxider, partiklar, kolmonoxid och volatila organiska ämnen förväntas minska i Europa såväl som i Sverige, medan utsläppen av ammoniak förväntas öka till 2020 i Europa.- Internationell sjöfart förväntas minska sina utsläpp av svaveldioxid på grund av IMO-beslut, men förväntad ökning i trafiken medför ökade utsläpp av NOx.- Såväl deposition som lufthalter fortsätter vara högst i södra Sverige.- Utsläppsminskningarna till 2020 medför minskat nedfall av svavel och kväve i Sverige.- Bidraget till kvävedeposition från internationell sjöfart ökar i hela landet till 2020, övriga bidrag minskar.- Luftkvaliteten i regional bakgrundsluft i Sverige förbättras för såväl marknära ozon som för SIA.- De högsta halterna av marknära ozon beräknas minska som en följd av utsläppsminskningar i Europa.

  • 3.
    Belusic, Danijel
    et al.
    SMHI, Research Department, Climate research - Rossby Centre.
    Berg, Peter
    SMHI, Research Department, Hydrology.
    Bozhinova, Denica
    SMHI, Research Department, Hydrology.
    Bärring, Lars
    SMHI, Research Department, Climate research - Rossby Centre.
    Doescher, Ralf
    SMHI, Research Department, Climate research - Rossby Centre.
    Eronn, Anna
    SMHI, Research Department, Climate research - Rossby Centre.
    Kjellström, Erik
    SMHI, Research Department, Climate research - Rossby Centre.
    Klehmet, Katharina
    SMHI, Research Department, Hydrology.
    Martins, Helena
    SMHI, Research Department, Climate research - Rossby Centre.
    Nilsson, Carin
    Olsson, Jonas
    SMHI, Research Department, Hydrology.
    Photiadou, Christiana
    SMHI, Research Department, Hydrology.
    Segersson, David
    SMHI, Research Department, Air quality.
    Strandberg, Gustav
    SMHI, Research Department, Climate research - Rossby Centre.
    Climate Extremes for Sweden2019Report (Other academic)
  • 4. Carlsen, Hanne Krage
    et al.
    Back, Erik
    Eneroth, Kristina
    Gislason, Thorarinn
    Holm, Mathias
    Janson, Christer
    Jensen, Steen Solvang
    Johannessen, Ane
    Kaasik, Marko
    Modig, Lars
    Segersson, David
    SMHI, Research Department, Air quality.
    Sigsgaard, Torben
    Forsberg, Bertil
    Olsson, David
    Orru, Hans
    Indicators of residential traffic exposure: Modelled NOX, traffic proximity, and self-reported exposure in RHINE III2017In: Atmospheric Environment, ISSN 1352-2310, E-ISSN 1873-2844, Vol. 167, p. 416-425Article in journal (Refereed)
  • 5. Felix, Erika
    et al.
    Gidhagen, Lars
    SMHI, Research Department, Air quality.
    Alonso, Marcelo F.
    Nahirny, Everaldo P.
    Alves, Bruno L.
    Segersson, David
    SMHI, Research Department, Air quality.
    Amorim, Jorge Humberto
    SMHI, Research Department, Air quality.
    Passive sampling as a feasible tool for mapping and model evaluation of the spatial distribution of nitrogen oxides in the city of Curitiba, Brazil2019In: Air quality, atmosphere and health, ISSN 1873-9318, E-ISSN 1873-9326, Vol. 12, no 7, p. 837-846Article in journal (Refereed)
  • 6. Krecl, Patricia
    et al.
    Cipoli, Yago Alonso
    Targino, Admir Creso
    Toloto, Matheus de Oliveira
    Segersson, David
    SMHI, Research Department, Air quality.
    Parra, Alvaro
    Polezer, Gabriela
    Moreton Godoi, Ricardo Henrique
    Gidhagen, Lars
    SMHI, Research Department, Air quality.
    Modelling urban cyclists' exposure to black carbon particles using high spatiotemporal data: A statistical approach2019In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 679, p. 115-125Article in journal (Refereed)
  • 7.
    Omstedt, Gunnar
    et al.
    SMHI, Research Department, Air quality.
    Andersson, Stefan
    SMHI, Research Department, Air quality.
    Asker, Christian
    SMHI, Professional Services.
    Jones, Jörgen
    SMHI, Professional Services.
    Kindell, Sven
    SMHI, Professional Services.
    Segersson, David
    SMHI, Research Department, Air quality.
    Luftkvalitet i Sverige år 2020: Uppföljning av miljökvalitetsmålet Frisk luft för trafikmiljöer i svenska tätorter2012Report (Other academic)
    Abstract [sv]

    Luftföroreningar är ett lokalt men också gränsöverskridande problem. Sveriges luftkvalitet påverkas av lokala utsläppskällor, men även av långdistans-transport från stora emissionsområden i Europa. Utsläppen av många luftföroreningar har minskat under de senaste årtiondena på grund av kontinuerligt skärpta emissionskrav och betydande förbättringar har gjorts för vägtransportsektorns reglerade avgasemissioner. Fortsatt minskningar är att förvänta som också påverkar luftkvaliteten. Trots kraftiga minskningar av utsläppen både i Sverige och övriga Europa har inte luftkvaliteten i våra städer, med avseende på kvävedioxid (NO2), ozon (O3) och partiklar (PM10), förbättrats på något avgörande sätt sedan år 2000. Fortfarande är luftföroreningshalterna i många trafikmiljöer höga såväl i Sverige som i övriga Europa. Syftet med projektet är att ge underlag för bedömningar av hur miljökvalitetsmålet Frisk luft uppfylls i svenska tätorter och påvisa effekter av vad olika åtgärder, såväl internationellt som i Sverige och lokalt i kommuner, kan komma att få för effekter på luftkvaliteten år 2020.

  • 8. Oudin, Anna
    et al.
    Segersson, David
    SMHI, Research Department, Air quality.
    Adolfsson, Rolf
    Forsberg, Bertil
    Association between air pollution from residential wood burning and dementia incidence in a longitudinal study in Northern Sweden2018In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 13, no 6, article id e0198283Article in journal (Refereed)
  • 9.
    Segersson, David
    SMHI, Research Department, Air quality.
    A dynamic model for shipping emissions: Adaptation of Airviro and application in the Baltic Sea2014Report (Other academic)
    Abstract [en]

    In many countries, shipping is an important contributor to emissions of air pollutants. For sulphur, shipping is nowadays often considered the most important source of emissions. Shipping also emits significant amounts of nitric oxides, particles and volatile organic compounds. From a climate change perspective, shipping is an important source of green house gases, and also contributes significantly to emissions of short lived climate pollutants, such as soot. Emissions to air from shipping have impact on air quality, climate change and acidification. To understand the impact of shipping emissions on the environment, human health and the climate, it is necessary to quantify, map and describe the emissions. Due to lack of data and knowledge, estimates of emissions from shipping have always been very uncertain. One reason to the uncertainties has been difficulties to locate the large number of ships travelling at sea, another reason has been uncertainties regarding emission factors. Since year 2007 AIS (Automatic Identification System) has been a standard for positioning and identification of ships at sea. AIS is complementary to radar and describes location, speed and identity of ships with high precision. This development creates new possibilities to improve information regarding emissions. A system that makes use of data from AIS to estimate emissions from shipping has been developed. The system allows emissions to be calculated for shipping based on the latest knowledge regarding emission factors and makes use of ship specific data as far as possible. The general motivation is to improve the quality of estimations of emissions of air pollutants, green house gases and SLCP (Short Lived Climate Pollutants) as well as to provide a flexible tool to be used for related questions. The system is an integrated part of the Air Quality Management system Airviro. The developed system has been applied for the Baltic Sea. This application of the system is called Shipair. Shipair contains AIS information for the whole Baltic Sea, and the North Sea up to the southern coast of Norway. The AIS information comes from the international AIS database operated by HELCOM. Besides AIS, the Shipair application also makes use of a web service operated by Swedish Maritime Administration to acquire and estimate ship specific parameters needed for emission calculations. The Shipair application of Airviro has been validated by comparing calculated and measured fuel consumption for a small number of ships. The differences between measured and calculated fuel consumption are below 10 % for the individual ships, which is considered well within what could be expected. Comparisons have also been made with results from other ship emission inventories. The results are similar to those of the STEAM2 model published by FMI (Finnish Meteorological Institute), which are based on a similar methodology. Emissions used by from EMEP (Environmental Monitoring and Evaluation Programme) on the other hand can be seen to give significantly higher emissions than both Shipair and STEAM2. Finally, indirect verification has been made by comparing results from dispersion models with concentrations measured in ambient air. Due to a large number of other emission sources that dominate the concentrations in ambient air, these results can confirm that the Shipair calculations are reasonable, but does not provide any closer evaluation of the quality of the results. To investigate if estimates based on fuel statistics, currently used in international reporting of Swedish shipping emissions, are reasonable, a comparison has also been made with estimations based on national fuel statistics. The results indicate that estimations based on the fuel statistics could be underestimating the emissions of CO2 from domestic shipping with approximately 50 %.

  • 10.
    Segersson, David
    SMHI, Research Department, Air quality.
    Numerical Quantification of Driving Rain on Buildings2003Report (Other academic)
    Abstract [en]

    Rain, which is given a horizontal velocity component by the influence of wind, is termed winddriven or driving rain. Driving rain is one of the main sources to the amount of moisture a building is exposed to, and thereby contributes to the processes deteriorating the building envelope. Examples of damages to the building envelope that the onslaught of driving rain directly or indirectly can contribute to are: cracks caused by the freezing of water absorbed in the facade, mould or rot, corrosion of concrete reinforcements and soiling patterns. Knowledge about the exposure of a building to driving rain is needed in order to minimise the deteriorating processes, and thus contributes to ensure a satisfactory performance of the building design.

    This work is meant as an introduction to the field of numerical quantification of driving rain on buildings. Focus is set on three-dimensional simulation of the wind flow and raindrop trajectories using CFD (Computational Fluid Dynamics). lnterest is also paid to some specific properties of rainfall, such as drop size distributions and drag forces on raindrops. The study includes a detailed description of a method to calculate the driving rain distribution on a building, as well as application of the method to a rectangular facade. A qualitative evaluation of the results indicates that the method can be used to calculate the mean distribution of driving rain on simple geometries with sufficient accuracy.

  • 11.
    Segersson, David
    et al.
    SMHI, Research Department, Air quality.
    Eneroth, Kristina
    Gidhagen, Lars
    SMHI, Research Department, Air quality.
    Johansson, Christer
    Omstedt, Gunnar
    SMHI, Research Department, Air quality.
    Nylen, Anders Engstrom
    Forsberg, Bertil
    Health Impact of PM10, PM2.5 and Black Carbon Exposure Due to Different Source Sectors in Stockholm, Gothenburg and Umea, Sweden2017In: International Journal of Environmental Research and Public Health, ISSN 1661-7827, E-ISSN 1660-4601, Vol. 14, no 7, article id 742Article in journal (Refereed)
  • 12. Stockfelt, Leo
    et al.
    Andersson, Eva M.
    Molnar, Peter
    Gidhagen, Lars
    SMHI, Research Department, Air quality.
    Segersson, David
    SMHI, Research Department, Air quality.
    Rosengren, Annika
    Barregard, Lars
    Sallsten, Gerd
    Long-term effects of total and source-specific particulate air pollution on incident cardiovascular disease in Gothenburg, Sweden2017In: Environmental Research, ISSN 0013-9351, E-ISSN 1096-0953, Vol. 158, p. 61-71Article in journal (Refereed)
1 - 12 of 12
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