The presentation on “Enviro-HIRLAM Research, Development, and Application” was delivered during the Atmosphere and Climate Competence Centre (ACCC) & Finnish Atmospheric Science Network (FASN) Science Conference held at the premises of the University of Helsinki and the Finnish Meteorological Institute during 10-12 November 2025 (Helsinki, Finland).

The poster on “Enviro-HIRLAM Research, Development, and Application” is focused on research, development and application of the Enviro-HIRLAM modelling system which are demonstrated on examples of ongoing High-Performance-Computing (HPC) projects at CSC. The IT Center for Science (CSC, Finland) provides opportunities for initiating and expanding collaboration between Finnish and international universities/ organizations in research and educational projects employing CSC’s computing infrastructure, computing resources, storage facilities, etc.  Such opportunity is realised as HPC projects, focused on the PEEX Modelling Platform (PEEX-MP) research and development (PEEX-MP-at-CSC) using the Enviro-HIRLAM. In particular, these activities are realised research projects in a field of the Earth Sciences and Environment. Several such projects with Enviro-HIRLAM are ongoing and allow to strengthen, expand and improve international collaboration among the PEEX Partners.

ACM–EWAI: “Effects of Aerosol-Cloud-Meteorology interactions on Extreme Weather events under Anthropogenic Impact”, considering uncertainties in modelling aerosol-cloud-meteorology interactions, aims to seamlessly model (Enviro-HIRLAM) and analyse various aerosol impacts on extreme weather events, focusing on cases with convective clouds under anthropogenic impact with enhancing consequences.
ACM–LCC: “Influence of Aerosol-Cloud-Meteorology interactions on extreme weather events under Land use/ land Cover Changes”, considering uncertainties in modelling aerosol-cloud-meteorology interactions, aims to seamlessly model and analyse different aerosol impacts on extreme weather events, focusing on cases with convective clouds and land use/land cover changes with enhancing consequences.
INTURBEM-DI: “INTegrated URBan Environmental Modeling: from Development to Implementation” aims at combined examination of urban climate and atmospheric pollution through an integrated methodology employing high-resolution numerical modelling and data fusion techniques. The proposed approach seamlessly merges urban scale large-eddy simulations, performed at a meter-scale using PALM model, with a kilometer-scale meteorological simulations using the Enviro-HIRLAM model. To enhance the precision and details of environmental assessments and predictions, remote-sensing and citizens’ data will be integrated. The project will ensure comprehensive understanding of urban environmental dynamics.
URB-LAHTI: “Green City Planning on air quality and local meteorology in Lahti” aims to quantify and evaluate local, regional and remote long-range sources of air pollution for city of Lahti (Finland) employing the Enviro-HIRLAM and FLEXPART-SOSAA modelling systems, to evaluate on how future scenarios (e.g., emission reduction, regional afforestation, and urban greenery restoration) will impact air quality and local-scale meteorology.
SMART: “Seamless Modelling of AtmospheRic state and composition under influence of Helsinki and other cities in the BalTic Sea region” aims to carry out evaluation of interaction between the atmospheric boundary layer and metropolitan areas. For that the Enviro-HIRLAM model with building effect parametrization module and anthropogenic heat flux to be employed to simulate meteorology and atmospheric composition (with focus on aerosols) for urban areas of Helsinki and other cities in the Baltic Sea region.
ISA–URB: “Integrated Systems and Analysis of URBan mobility for climate-neutral and sustainable cities in Europe” aims to enhance understanding of the interactions among urban multimodal mobility, traffic emissions, air quality, and thus, climate change in cities. The Enviro-HIRLAM will be utilized for multi-scenarios simulations, and for proposing multi-mode transport schemes conducive to sustainable development, with emissions reduction and mitigation of health and climate risks.
A4–SDC: “Assessment of the current state of Atmospheric Air in the Atyrau region (Republic of Kazakhstan) in the Sustainable Development Context” aims to carry out a comprehensive research of the air basin quality in the Atyrau region using meteorological and air quality monitoring data related, to simulate meteorology and atmospheric composition (with focus on aerosols) on regional scale with Enviro-HIRLAM, and to develop a set of recommendations for improving air quality management on a basis of scenario assessments and advance diagnostics of air environment parameters.

See more details in the presentation.

Text by: Alexander Mahura, University of Helsinki – INAR, Helsinki, Finland