
Torleif Weydahl
Torleif Weydahl is a senior scientist in the Department of Urban Environment and Industry and has worked at NILU since 2017. He holds a degree in mechanical engineering specializing in energy and process technology and has a doctorate from the University of Trondheim (NTNU) in modeling of turbulent mixing and reactions.
At NILU, Torleif primarily works on air quality (AQ) assessments related to requirements within Norwegian regulation and in emission permits for Norwegian municipalities and industrial companies. He conducts emission and dispersion calculations for several source sectors, including analyses and the preparation of reports and documentation. He has developed AQ assessment and action plans for several Norwegian municipalities and has led the development of NERVE, an emission model for road traffic.
Torleif contributes to the European Environment Agency's (EEA) topic centers, focusing on reporting emissions from the industrial sector in EU and EEA member countries. He is also an experienced project manager.
Before starting at NILU, Torleif gained experience in carbon capture and storage research from SINTEF in Trondheim and in consultancy related to fire and safety at Lloyd's Register.
Silje Winnem
Silje Winnem is the administration coordinator in the Department of Environmental Chemistry and Health Effects at NILU. She is located in The Fram Centre in Tromsø.
As administrative coordinator, Winnem is responsible for all the administrative work and plays a key role in tying together the various disciplines and departments into one business. She is an active partner and facilitator, and is systematic, service-minded, responsible and proactive.
She is also a member of the User Committee at The Fram Centre, where NILU in Tromsø is located, and is active in the collaboration between the other 20 institutions in the building.

Karl Espen Yttri
Dr. Karl Espen Yttri is a senior scientist at NILU with a Ph.D. in aerosol science. He has extensive expertise in atmospheric aerosols and their chemical composition across diverse environments, ranging from urban areas to the pristine Arctic and Antarctic.
His primary focus is on carbonaceous aerosols, using both on-line and off-line methodologies for the source apportionment of anthropogenic and natural aerosol sources. This includes developing analytical methods for carbonaceous aerosol, including source-specific organic tracers.
As a member of the Chemical Coordinating Centre of the European Monitoring and Evaluation Programme (EMEP) at NILU, he contributes to research on the long-range atmospheric transport of aerosol particles.

Rune Åvar Ødegård
Rune Ødegård is the Director of Digitalisation at NILU, leading the Digital Technologies Department. He holds a MSc degree in Environmental Pollution Control Management from Heriot-Watt University in Edinburgh.
Since 1997, Ødegård has been working as an interdisciplinary researcher between environmental science and information technology, building over twenty years of experience in managing, designing, developing, and implementing environmental systems. He has taken on roles as both a participating researcher and project leader across numerous research projects, both national and international.
In 2008, Ødegård became department leader for the Digital Technologies Department, and in 2019, he was appointed Director of Digitalisation.

Wenche Aas
Dr. Wenche Aas holds a Ph.D. in Inorganic Chemistry and specializes in atmospheric composition and the long-range transport of air pollution. She leads the Norwegian monitoring program for long-range transboundary air pollution on behalf of the Norwegian Environment Agency and the Ministry of Climate and Environment.
She coordinates the work under the Chemical Coordinating Centre (CCC) hosted at NILU within the European Monitoring and Evaluation Programme (EMEP) under the UN-ECE.
Dr. Aas is a member of the Scientific Advisory Group for Total Atmospheric Deposition (SAG-TAD) and Measurement-Model Fusion for Global Total Atmospheric Deposition (MMF-GTAD) within the WMO/GAW framework. She is a member of the Board of Directors for SIOS.