The observatory says the Royal Swedish Academy of Sciences cited him for decisive contributions to IceCube and the discovery of high-energy neutrinos of astrophysical origin.
According to the announcement, IceCube instruments one cubic kilometer of glacial ice at the South Pole. Its collaboration comprises more than 450 scientists at 58 institutions in 14 countries. IceCube reported the astrophysical high-energy neutrino flux in 2013; it later reported evidence of neutrino emission from TXS 0506+056 and NGC 1068, and announced neutrinos from the Milky Way in 2023.
The IceCube Upgrade was installed during 2025–2026 to lower the detector’s energy threshold and improve ice calibration. The collaboration expects first science data from that upgrade later in 2026. IceCube-Gen2 remains proposed; the source describes an optical array eight times larger by volume and radio detection for higher-energy neutrinos.
The announcement does not provide Nobel committee materials, technical performance results from the upgrade, or a confirmed construction decision for IceCube-Gen2.