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  • Ciarelli, Giancarlo
    et al.
    Colette, Augustin
    Schucht, Simone
    Beekmann, Matthias
    Andersson, Camilla
    SMHI, Research Department, Air quality.
    Manders-Groot, Astrid
    Mircea, Mihaela
    Tsyro, Svetlana
    Fagerli, Hilde
    Ortiz, Alberto Gonzalez
    Adani, Mario
    Briganti, Gino
    Cappelletti, Andrea
    D'Isidoro, Massimo
    Cuvelier, Cornelis
    Couvidat, Florian
    Meleux, Frederik
    Bessagnet, Bertrand
    Long-term health impact assessment of total PM2.5 in Europe during the 1990-2015 period2019In: ATMOSPHERIC ENVIRONMENT-X, ISSN 2590-1621, Vol. 3, article id UNSP 100032Article in journal (Refereed)
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  • Andersson, Eva M.
    et al.
    Ogren, Mikael
    Molnar, Peter
    Segersson, David
    SMHI, Research Department, Air quality.
    Rosengren, Annika
    Stockfelt, Leo
    Road traffic noise, air pollution and cardiovascular events in a Swedish cohort2020In: Environmental Research, ISSN 0013-9351, E-ISSN 1096-0953, Vol. 185, article id 109446Article in journal (Refereed)
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  • Wu, Minchao
    et al.
    SMHI, Research Department, Climate research - Rossby Centre.
    Nikulin, Grigory
    SMHI, Research Department, Climate research - Rossby Centre.
    Kjellström, Erik
    SMHI, Research Department, Climate research - Rossby Centre.
    Belušić, Danijel
    SMHI, Research Department, Climate research - Rossby Centre.
    Jones, Colin
    Lindstedt, David
    SMHI, Research Department, Climate research - Rossby Centre.
    The impact of regional climate model formulation and resolution on simulated precipitation in Africa2020In: Earth System Dynamics, ISSN 2190-4979, E-ISSN 2190-4987, Vol. 11, no 2, p. 377-394Article in journal (Refereed)
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  • Langner, Joakim
    et al.
    SMHI, Research Department, Air quality.
    Gidhagen, Lars
    SMHI, Research Department, Air quality.
    Bergström, Robert
    SMHI, Research Department, Air quality.
    Gramsch, Ernesto
    Oyola, Pedro
    Reyes, Felipe
    Segersson, David
    SMHI, Research Department, Air quality.
    Aguilera, Claudio
    Model-simulated Source Contributions to PM2.5 in Santiago and the Central Region of Chile2020In: Aerosol and Air Quality Research, ISSN 1680-8584, E-ISSN 2071-1409, Vol. 20, no 5, p. 1111-1126Article in journal (Refereed)
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  • Egbebiyi, Temitope Samuel
    et al.
    Crespo, Olivier
    Lennard, Christopher
    Zaroug, Modathir
    Nikulin, Grigory
    SMHI, Research Department, Climate research - Rossby Centre.
    Harris, Ian
    Price, Jeff
    Forstenhaeusler, Nicole
    Warren, Rachel
    Investigating the potential impact of 1.5, 2 and 3 degrees C global warming levels on crop suitability and planting season over West Africa2020In: PeerJ, ISSN 2167-8359, E-ISSN 2167-8359, Vol. 8, article id e8851Article in journal (Refereed)
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  • Gidhagen, Lars
    et al.
    SMHI, Research Department, Air quality.
    Olsson, Jonas
    SMHI, Research Department, Hydrology.
    Amorim, Jorge Humberto
    SMHI, Research Department, Air quality.
    Asker, Christian
    SMHI, Research Department, Air quality.
    Belušić, Danijel
    SMHI, Research Department, Climate research - Rossby Centre.
    Carvalho, Ana Cristina
    SMHI, Research Department, Air quality.
    Engardt, Magnuz
    Hundecha, Yeshewatesfa
    SMHI, Research Department, Hydrology.
    Körnich, Heiner
    SMHI, Research Department, Meteorology.
    Lind, Petter
    SMHI, Research Department, Climate research - Rossby Centre.
    Lindstedt, David
    SMHI, Research Department, Climate research - Rossby Centre.
    Olsson, Esbjörn
    SMHI, Research Department, Meteorology.
    Rosberg, Jörgen
    SMHI, Research Department, Hydrology.
    Segersson, David
    SMHI, Research Department, Air quality.
    Strombäck, Lena
    SMHI, Research Department, Hydrology.
    Towards climate services for European cities: Lessons learnt from the Copernicus project Urban SIS2020In: Urban Climate, ISSN 2212-0955, E-ISSN 2212-0955, Vol. 31, article id 100549Article in journal (Refereed)
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  • Jacob, Daniela
    et al.
    Teichmann, Claas
    Sobolowski, Stefan
    Katragkou, Eleni
    Anders, Ivonne
    Belda, Michal
    Benestad, Rasmus
    Boberg, Fredrik
    Buonomo, Erasmo
    Cardoso, Rita M.
    Casanueva, Ana
    Christensen, Ole B.
    Christensen, Jens Hesselbjerg
    Coppola, Erika
    De Cruz, Lesley
    Davin, Edouard L.
    Dobler, Andreas
    Dominguez, Marta
    Fealy, Rowan
    Fernandez, Jesus
    Gaertner, Miguel Angel
    Garcia-Diez, Markel
    Giorgi, Filippo
    Gobiet, Andreas
    Goergen, Klaus
    Jose Gomez-Navarro, Juan
    Gonzalez Aleman, Juan Jesus
    Gutierrez, Claudia
    Gutierrez, Jose M.
    Guttler, Ivan
    Haensler, Andreas
    Halenka, Tomas
    Jerez, Sonia
    Jimenez-Guerrero, Pedro
    Jones, Richard G.
    Keuler, Klaus
    Kjellström, Erik
    SMHI, Research Department, Climate research - Rossby Centre.
    Knist, Sebastian
    Kotlarski, Sven
    Maraun, Douglas
    van Meijgaard, Erik
    Mercogliano, Paola
    Pedro Montavez, Juan
    Navarra, Antonio
    Nikulin, Grigory
    SMHI, Research Department, Climate research - Rossby Centre.
    de Noblet-Ducoudre, Nathalie
    Panitz, Hans-Juergen
    Pfeifer, Susanne
    Piazza, Marie
    Pichelli, Emanuela
    Pietikaeinen, Joni-Pekka
    Prein, Andreas F.
    Preuschmann, Swantje
    Rechid, Diana
    Rockel, Burkhardt
    Romera, Raquel
    Sanchez, Enrique
    Sieck, Kevin
    Soares, Pedro M. M.
    Somot, Samuel
    Srnec, Lidija
    Sorland, Silje Lund
    Termonia, Piet
    Truhetz, Heimo
    Vautard, Robert
    Warrach-Sagi, Kirsten
    Wulfmeyer, Volker
    Regional climate downscaling over Europe: perspectives from the EURO-CORDEX community2020In: Regional Environmental Change, ISSN 1436-3798, E-ISSN 1436-378X, Vol. 20, no 2, article id UNSP 51Article in journal (Refereed)
    Abstract [en]

    The European CORDEX (EURO-CORDEX) initiative is a large voluntary effort that seeks to advance regional climate and Earth system science in Europe. As part of the World Climate Research Programme (WCRP) - Coordinated Regional Downscaling Experiment (CORDEX), it shares the broader goals of providing a model evaluation and climate projection framework and improving communication with both the General Circulation Model (GCM) and climate data user communities. EURO-CORDEX oversees the design and coordination of ongoing ensembles of regional climate projections of unprecedented size and resolution (0.11 degrees EUR-11 and 0.44 degrees EUR-44 domains). Additionally, the inclusion of empirical-statistical downscaling allows investigation of much larger multi-model ensembles. These complementary approaches provide a foundation for scientific studies within the climate research community and others. The value of the EURO-CORDEX ensemble is shown via numerous peer-reviewed studies and its use in the development of climate services. Evaluations of the EUR-44 and EUR-11 ensembles also show the benefits of higher resolution. However, significant challenges remain. To further advance scientific understanding, two flagship pilot studies (FPS) were initiated. The first investigates local-regional phenomena at convection-permitting scales over central Europe and the Mediterranean in collaboration with the Med-CORDEX community. The second investigates the impacts of land cover changes on European climate across spatial and temporal scales. Over the coming years, the EURO-CORDEX community looks forward to closer collaboration with other communities, new advances, supporting international initiatives such as the IPCC reports, and continuing to provide the basis for research on regional climate impacts and adaptation in Europe.

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  • Zhang, W.
    et al.
    Doescher, Ralf
    SMHI, Research Department, Climate research - Rossby Centre.
    Koenigk, Torben
    SMHI, Research Department, Climate research - Rossby Centre.
    Miller, P. A.
    Jansson, Christer
    SMHI, Research Department, Climate research - Rossby Centre.
    Samuelsson, Patrick
    SMHI, Research Department, Climate research - Rossby Centre.
    Wu, Minchao
    SMHI, Research Department, Climate research - Rossby Centre.
    Smith, B.
    The Interplay of Recent Vegetation and Sea Ice Dynamics-Results From a Regional Earth System Model Over the Arctic2020In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 47, no 6, article id e2019GL085982Article in journal (Refereed)
    Abstract [en]

    Recent accelerated warming over the Arctic coincides with sea ice reduction and shifting patterns of land cover. We use a state-of-the-art regional Earth system model, RCAO-GUESS, which comprises a dynamic vegetation model (LPJ-GUESS), a regional atmosphere model (RCA), and an ocean sea ice model (RCO), to explore the dynamic coupling between vegetation and sea ice during 1989-2011. Our results show that RCAO-GUESS captures recent trends in observed sea ice concentration and extent, with the inclusion of vegetation dynamics resulting in larger, more realistic variations in summer and autumn than the model that does not account for vegetation dynamics. Vegetation feedbacks induce concomitant changes in downwelling longwave radiation, near-surface temperature, mean sea level pressure, and sea ice reductions, suggesting a feedback chain linking vegetation change to sea ice dynamics. This study highlights the importance of including interactive vegetation dynamics in modeling the Arctic climate system, particularly when predicting sea ice dynamics. Plain Language Summary Recent accelerated warming over the Arctic is associated with dramatic changes in the physical environment, among which unprecedented sea ice decline has received particular attention. In this study, we use a regional Earth system model accounting for interactive coupling between the atmosphere, land vegetation, and sea ice dynamics to explore their potential links. Our model simulates observed spatiotemporal patterns of sea ice thickness and extent reasonably well. Furthermore, the results show that feedbacks of warming-driven vegetation changes on the near-surface radiation balance can cause greater variations in sea ice between seasons, which can contribute to an accelerated trend of sea ice reduction. The changes in mean sea level pressure caused by vegetation changes can alter the transport of energy and warm the land, sea, and sea ice surfaces. Downwelling longwave radiation is the dominant factor contributing to the near-surface warming and increased sea ice melting. Our study highlights the importance of adopting fully coupled Earth system models that account for interactive effects of vegetation dynamics on the physical climate system, in particular when analyzing the reduction of sea ice in the Arctic.

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  • Vazquez-Martin, Sandra
    et al.
    Kuhn, Thomas
    Eliasson, Salomon
    SMHI, Research Department, Atmospheric remote sensing.
    Shape Dependence of Falling Snow Crystals' Microphysical Properties Using an Updated Shape Classification2020In: Applied Sciences, E-ISSN 2076-3417, Vol. 10, no 3, article id 1163Article in journal (Refereed)
    Abstract [en]

    We present ground-based in situ snow measurements in Kiruna, Sweden, using the ground-based in situ instrument Dual Ice Crystal Imager (D-ICI). D-ICI records dual high-resolution images from above and from the side of falling natural snow crystals and other hydrometeors with particle sizes ranging from 50 mu m to 4 mm. The images are from multiple snowfall seasons during the winters of 2014/2015 to 2018/2019, which span from the beginning of November to the middle of May. From our images, the microphysical properties of individual particles, such as particle size, cross-sectional area, area ratio, aspect ratio, and shape, can be determined. We present an updated classification scheme, which comprises a total of 135 unique shapes, including 34 new snow crystal shapes. This is useful for other studies that are using previous shape classification schemes, in particular the widely used Magono-Lee classification. To facilitate the study of the shape dependence of the microphysical properties, we further sort these individual particle shapes into 15 different shape groups. Relationships between the microphysical properties are determined for each of these shape groups.

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  • Loeb, Norman G.
    et al.
    Wang, Hailan
    Allan, Richard P.
    Andrews, Timothy
    Armour, Kyle
    Cole, Jason N. S.
    Dufresne, Jean-Louis
    Forster, Piers
    Gettelman, Andrew
    Guo, Huan
    Mauritsen, Thorsten
    Ming, Yi
    Paynter, David
    Proistosescu, Cristian
    Stuecker, Malte F.
    Willén, Ulrika
    SMHI, Research Department, Climate research - Rossby Centre.
    Wyser, Klaus
    SMHI, Research Department, Climate research - Rossby Centre. SMHI, Research Department, Hydrology.
    New Generation of Climate Models Track Recent Unprecedented Changes in Earth's Radiation Budget Observed by CERES2020In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 47, no 5, article id e2019GL086705Article in journal (Refereed)
    Abstract [en]

    We compare top-of-atmosphere (TOA) radiative fluxes observed by the Clouds and the Earth's Radiant Energy System (CERES) and simulated by seven general circulation models forced with observed sea-surface temperature (SST) and sea-ice boundary conditions. In response to increased SSTs along the equator and over the eastern Pacific (EP) following the so-called global warming "hiatus" of the early 21st century, simulated TOA flux changes are remarkably similar to CERES. Both show outgoing shortwave and longwave TOA flux changes that largely cancel over the west and central tropical Pacific, and large reductions in shortwave flux for EP low-cloud regions. A model's ability to represent changes in the relationship between global mean net TOA flux and surface temperature depends upon how well it represents shortwave flux changes in low-cloud regions, with most showing too little sensitivity to EP SST changes, suggesting a "pattern effect" that may be too weak compared to observations.

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  • Olofsson, Malin
    et al.
    Klawonn, Isabell
    Karlson, Bengt
    SMHI, Research Department, Oceanography.
    Nitrogen fixation estimates for the Baltic Sea indicate high rates for the previously overlooked Bothnian Sea2020In: Ambio, ISSN 0044-7447, E-ISSN 1654-7209Article in journal (Refereed)
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  • Christensen, Ole B.
    et al.
    Kjellström, Erik
    SMHI, Research Department, Climate research - Rossby Centre.
    Partitioning uncertainty components of mean climate and climate change in a large ensemble of European regional climate model projections2020In: Climate Dynamics, ISSN 0930-7575, E-ISSN 1432-0894Article in journal (Refereed)
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  • Kukkonen, Jaakko
    et al.
    Lopez-Aparicio, Susana
    Segersson, David
    SMHI, Research Department, Air quality.
    Geels, Camilla
    Kangas, Leena
    Kauhaniemi, Mari
    Maragkidou, Androniki
    Jensen, Anne
    Assmuth, Timo
    Karppinen, Ari
    Sofiev, Mikhail
    Hellen, Heidi
    Riikonen, Kari
    Nikmo, Juha
    Kousa, Anu
    Niemi, Jarkko, V
    Karvosenoja, Niko
    Santos, Gabriela Sousa
    Sundvor, Ingrid
    Im, Ulas
    Christensen, Jesper Heile
    Nielsen, Ole-Kenneth
    Plejdrup, Marlene
    Nojgaard, Jacob Kleno
    Omstedt, Gunnar
    SMHI, Research Department, Air quality. SMHI, Research Department, Oceanography.
    Andersson, Camilla
    SMHI, Research Department, Air quality.
    Forsberg, Bertil
    Brandt, Jorgen
    The influence of residential wood combustion on the concentrations of PM2.5 in four Nordic cities2020In: Atmospheric Chemistry And Physics, ISSN 1680-7316, E-ISSN 1680-7324, Vol. 20, no 7, p. 4333-4365Article in journal (Refereed)
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  • Neset, Tina-Simone
    et al.
    Andersson, Lotta
    SMHI, Research Department, Hydrology. SMHI, Core Services.
    Uhrqvist, Ola
    Navarra, Carlo
    Serious Gaming for Climate Adaptation-Assessing the Potential and Challenges of a Digital Serious Game for Urban Climate Adaptation2020In: Sustainability, ISSN 2071-1050, E-ISSN 2071-1050, Vol. 12, no 5, article id 1789Article in journal (Refereed)
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  • Weill, James G.
    SMHI.
    VERIFICATION OF HEATED WATER JETNUMERICAL MODEL1974Report (Other academic)
    Abstract [en]

    Reported are diverse efforts to verify, or test the accuracy of,a numerical model for thermal pollution predictions. The model,developed by Prych (1972) at SMHI, is an integral analysis ofa buoyant, turbulent surface jet. The program. is slightly revised,and effects of the changes are presented.

    Numerical model results are compared directly with ten prototype situations: eight sets of data from a Swedish power station on the coast of the Baltic Sea, and data from two power plants on Lake Michigan in the United States. A few direct comparisons are made with a laboratory model of the Swedish plant and with laboratory data for momentumless surface jets. To minimize coastal effects, a scheme is presented for interfacing then umerical model with undistorted laboratory model results.

    The discharge situation is described nondimensionally, and numerical experiments are made to determine the sensitivities of jet temperatures to input variables. Results are compared with phenomenological and analytical models. In addition to the main verification effort, investigations are made concerning methods of field data collection.

    Conclusions are presented for direct application and for relative or comparative use of the numerical model.

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  • Wåhlstrom, Irene
    et al.
    SMHI, Research Department, Oceanography.
    Höglund, Anders
    SMHI, Research Department, Oceanography.
    Almroth-Rosell, Elin
    SMHI, Research Department, Oceanography.
    MacKenzie, Brian R.
    Groger, Matthias
    SMHI, Research Department, Oceanography.
    Eilola, Kari
    SMHI, Research Department, Oceanography.
    Plikshs, Maris
    Andersson, Helén
    SMHI, Research Department, Oceanography.
    Combined climate change and nutrient load impacts on future habitats and eutrophication indicators in a eutrophic coastal sea2020In: Limnology and Oceanography, ISSN 0024-3590, E-ISSN 1939-5590Article in journal (Refereed)
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  • Meier, Markus
    et al.
    SMHI, Research Department, Oceanography.
    Boergel, Florian
    Frauen, Claudia
    Radtke, Hagen
    Commentary: Lake or Sea? The Unknown Future of Central Baltic Sea Herring2020In: Frontiers in Ecology and Evolution, E-ISSN 2296-701X, Vol. 8, article id 55Article in journal (Refereed)
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  • Lavers, David A.
    et al.
    Ramos, Maria-Helena
    Magnusson, Linus
    Pechlivanidis, Ilias
    SMHI, Research Department, Hydrology.
    Klein, Bastian
    Prudhomme, Christel
    Arnal, Louise
    Crochemore, Louise
    SMHI, Research Department, Hydrology.
    Van Den Hurk, Bart
    Weerts, Albrecht H.
    Harrigan, Shaun
    Cloke, Hannah L.
    Richardson, David S.
    Pappenberger, Florian
    A Vision for Hydrological Prediction2020In: Atmosphere, ISSN 2073-4433, E-ISSN 2073-4433, Vol. 11, no 3, article id 237Article in journal (Refereed)
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