Aleksi Nummelin

Aleksi Nummelin serves as Senior Researcher at NORCE Norwegian Research Centre in Bergen, Norway, within the Division of Climate & Environment and Earth Systems Research Group. He is a principal contributor to the Norwegian Earth System Model (NorESM) development team, applying this framework to investigate climate dynamics across geological timescales. His institutional affiliation includes multiple funded projects examining polar ocean processes, Arctic climate transformation, and deep-time paleoclimate systems.

Nummelin's research centers on Earth system modeling with specialization in Arctic climate dynamics, ocean circulation mechanics, and paleoclimate transitions. He investigates critical phenomena including Arctic amplification feedbacks, Southern Ocean convection shutdown mechanisms, and bathymetric influences on climate evolution. His methodological expertise spans high-resolution coupled modeling, mesoscale eddy parameterization development, and model-data integration for paleoclimate validation.

Recent publication trends (2023-2025) reveal concentrated focus on Arctic system transformation, with significant contributions to understanding Atlantification divergence across models, winter amplification sensitivity, and sea-level rise impacts on global circulation. His paleoclimate work examines Eocene-Oligocene transitions and Dansgaard-Oeschger events through the lens of ocean gateway evolution and deep-ocean temperature reconstruction, demonstrating consistent integration of geological insights with modern modeling frameworks.

Nummelin leads or contributes to multiple funded initiatives including MAPARC (Mechanism and prediction of the new Arctic climate system) and DOTpaleo (Deep Ocean Temperatures in the Paleogene Greenhouse), which support international collaborations and advanced model development. While student supervision details aren't specified, his projects provide substantial research opportunities in climate modeling and polar oceanography.

As core member of NORCE's Earth Systems Research Group, Nummelin operates within the NorESM development team that contributes to international modeling efforts including CMIP6. This group maintains leadership in polar climate modeling, with particular expertise in Arctic ocean-sea ice interactions, paleoclimate applications, and high-resolution process studies that inform both contemporary climate understanding and future projections.