The dataset presents a 43 year-long reanalysis of pollen seasons for three major allergenic genera of trees in Europe: alder (Alnus), birch (Betula), and olive (Olea). Driven by the meteorological reanalysis ERA5, the atmospheric composition model SILAM predicted the flowering period and calculated the Europe-wide dispersion pattern of pollen for the years 1980-2022. The model applied an extended 4-dimensional variational data assimilation of in-situ observations of aerobiological networks in 34 European countries to reproduce the inter-annual variability and trends of pollen production and distribution. The control variable of the assimilation procedure was the total pollen release during each flowering season, implemented as an annual correction factor to the mean pollen production. The dataset was designed as an input to studies on climate-induced and anthropogenically driven changes in the European vegetation, biodiversity monitoring, bioaerosol modelling and assessment, as well as, in combination with intra-seasonal observations, for health-related applications.

Aeroallergen Monitoring Centre AMoC Department of Immunology and Allergy Allergy Poland

Allergen Research Center Warsaw Poland

Allergology Research Laboratory Colentina Clinical Hospital București Romania

Andalusian Institute for Earth System Research University of Granada Granada Spain

Biodiversity and Environmental Management University of León León Spain

Biodiversity Unit University of Turku Turku Finland

BioSense Institute Research Institute for Information Technologies in Biosystems University of Novi Sad Novi Sad Serbia

Bursa Uludag University Faculty of Arts and Science Department of Biology Aerobiology Laboratory 16059 Görükle Bursa Türkiye

Center of Allergy and Environment Technical University and Helmholtz Center Munich Munich Germany

Center of Allergy and Immunology Tbilisi Georgia

Clinical Department 5 Carol Davila University of Medicine Bucharest Romania

College of Natural Sciences University of Rzeszow Rzeszow Poland

Czech Hydrometeorological Institute Prague Czech Republic

Departament de Biologia Animal Biologia Vegetal i Ecologia Universitat Autònoma de Barcelona Bellaterra Spain

Department of Biological and Environmental Sciences University of Gothenburg Gothenburg Sweden

Department of Biology Animal Plant Biology and Ecology University of Jaén Jaén Spain

Department of Biology NTNU Trondheim Norway

Department of Botany and Plant Physiology Subdepartment of Aerobiology University of Life Sciences in Lublin Lublin Poland

Department of Botany and Plant Physiology University of Malaga Malaga Spain

Department of Botany University of Granada Granada Spain

Department of Construction School of Technology University of Extremadura Avda de la Universidad s n Cáceres Spain

Department of Ecology School of Biology Faculty of Sciences Aristotle University of Thessaloniki Thessaloniki Greece

Department of Hygiene and Health Prevention Agency for Health Protection of Metropolitan Area of Milan Milan Italy

Department of Otorhinolaryngology Medical University of Vienna Vienna Austria

Department of Pharmacology Pharmacognosy and Botany Faculty of Pharmacy Complutense University of Madrid Madrid Spain

Department of Pharmacy National Pirogov Memorial Medical University Vinnytsia Ukraine

Department of Pulmonology Leiden University Medical Center Leiden the Netherlands

Department of the Prevention of Environmental Hazard Allergology and Immunology Medical University of Warsaw Warsaw Poland

Elkerliek Helmond Helmond Netherlands

Estonian Environmental research Institute Tartu Estonia

Faculty of Biology Moscow State University Moscow Russia

Faculty of Biology Shenzhen MSU BIT University Shenzhen China

Federal Office of Meteorology and Climatology MeteoSwiss Zurich Switzerland

Finnish Meteorological Institute Helsinki Finland

French Aerobiological Monitoring Network Brussieu France

Health air quality and UK pollen forecasting UK Met Office Exeter UK

HUS Helsingin yliopistollinen sairaala Jyväskylä Finland

Icelandic Institute of Natural History Akureyri Iceland

Institut de Ciència i Tecnologia Ambientals Universitat Autònoma de Barcelona Bellaterra Spain

Institute of Atmospheric Sciences and Climate CNR Bologna Italy

Institute of Biology College of Natural Sciences University of Rzeszow Rzeszow Poland

Inter University Institute for Earth System Research University of Cordoba Cordoba Spain

Jagiellonian University Medical College Department of Clinical and Environmental Allergology Kraków Poland

Laboratory of Aerobiology at Teaching Institute of Public Health dr Andrija Štampar Zagreb Croatia

Laboratory of Aerobiology Department of Systematic and Environmental Botany Faculty of Biology Adam Mickiewicz University Poznan Poland

Masaryk University Brno Czech Republic

Medical University of Lodz Lodz Poland

Mycology and Aerobiology Sciensano Brussels Belgium

National Center for Public Health and Pharmacy Budapest Hungary

National Laboratory of Health Environment and Food Maribor Slovenia

Palynological Laboratory Swedish Museum of Natural History Stockholm Sweden

Pollen Laboratory Department of Biological and Environmental Sciences University of Gothenburg Gothenburg Sweden

Regional Public Health Office department of medical microbiology bratislava Slovakia

Retired from Faculty of Pharmacy of the Belarusian State Medical University Minsk Belarus

Sciences Faculty University of Vigo Ourense 32002 Spain

Serbian Environmental Protection Agency Belgrade Serbia

South Karelia Allergy and Environment Institute Imatra Finland

Stiftelsen NILU Stiftelsen Norwegian Institute for Air Research Kjeller Norway

The Asthma and Allergy Association Roskilde Denmark

Unit of Immunology Allergology Centre Hospitalier de Luxembourg Luxembourg

Université de Lille CNRS UMR 8516 LASIRE Laboratoire de Spectroscopie pour les Interactions la Réactivité et l'Environnement F 59000 Lille France

University Hospital Brno Brno Czech Republic

University Institute of research in Olive Groves and Olive Oils University of Jaén Jaén Spain

University of Castilla La Mancha Institute of Environmental Sciences Toledo Spain

University of Évora School of Health and Human Development Department of Medical and Health Sciences and Institute of Earth Sciences ICT Évora Portugal

University of Innsbruck Department of Botany Innsbruck Austria

University of Latvia Riga Latvia

University of Navarra Biodiversity and Environment Institute Pamplona Spain

University of Worcester School of Science and Environment Worcester UK

Vilnius University Siauliai Academy Siauliai Lithuania

Zabludovicz Center for Autoimmune Diseases Sheba Medical Center Ramat Gan Israel

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