Norway, Sweden and Finland have historically experienced less intense heat than continental Europe, but temperatures approaching 40 °C are now a credible risk there. An analysis of all available forecasts from the European Centre for Medium-Range Weather Forecasts’ seasonal system - representing 7,308 simulated summers - estimates a 0.53% annual chance of at least one Nordic location reaching 40 °C in 2025, with a 95% confidence interval of 0.38-0.70%. That probability has increased sixfold since 1981. The chance of surpassing the existing national heat record is highest in Norway, at 10.9% per year under present-day conditions.
The rare extremes emerge when strong omega blocking - an atmospheric circulation pattern that can sustain hot conditions - coincides with low soil moisture in northern Europe. These findings show that the short observational record, in which such temperatures have not been recorded across the Nordic countries, does not capture the full range of plausible heat. Because people and infrastructure in the region are generally less adapted to severe heat than those in warmer climates, planning around historical records alone could leave communities unprepared. The results point to a need to account for substantially higher peak temperatures in risk assessments and heat preparedness.
Summary generated by AI from the linked article. hn.today is not affiliated with Hacker News or Y Combinator.
China plans to land astronauts on the Moon before 2030 using a lunar-orbit rendezvous, with the crew and lander launched separately. The schedule calls for uncrewed rocket and lander tests in 2027 and 2028, followed by orbital docking tests in 2029. (arstechnica.com)
NASA’s decommissioned Swift telescope is expected to re-enter Earth’s atmosphere on November 4, though its landing location and which parts will survive are unknown. Launched in 2004, the observatory detected at least 1,400 supernovas and studied high-energy cosmic explosions. (abc.net.au)
A study says paper straws can have a greater environmental impact than plastic straws. The finding challenges the assumption that paper is always the greener choice. (nypost.com)
Maksym Radziwill gives a talk titled “The quasi-Riemann Hypothesis.” The subject is a mathematical hypothesis related to the Riemann Hypothesis. (youtube.com)
A large international study found that common questionnaires and task-based tests of cognitive reappraisal do not measure the same ability. This mismatch makes it harder to assess a skill central to cognitive behavioral therapy and emotional resilience. (arstechnica.com)
SLAC researchers found experimental proof of altermagnetism, a newly recognized magnetic phase. The finding confirms a distinct form of magnetic order and could expand research into magnetic materials. (www6.slac.stanford.edu)
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