# Rising UV radiation and declining cloud cover in Europe > Live situation record from CLSTR: https://clstr.news/situations/rising-uv-radiation-and-declining-cloud-cover-in-europe > Updated: 2026-09-25T14:10:59.000Z. Sources: 3. Developments: 2. Research indicates a significant increase in UV radiation across Europe, driven primarily by declining cloud cover rather than changes in the ozone layer. An analysis of 40 meteorological stations from southern Spain to northern Finland found that between 2013 and 2022, 26 locations experienced annual increases in UV-B doses—the type responsible for skin erythema—ranging from 0.46% to 2.62%. In Poland, measurements at Belsk na Mazowszu showed an average annual UV dose increase of 0.66%. Broader climate studies suggest that low-level clouds, such as stratocumulus over tropical oceans, have historically acted as a cooling mechanism by reflecting solar radiation. However, satellite data from 1979 to 2025 shows these clouds increased by approximately 0.18% per decade, and climate models suggest this cooling effect may reverse. Rising temperatures and atmospheric circulation changes could reduce low cloud cover, potentially creating a positive feedback loop that accelerates global warming. ## Timeline ### 2026-09-25: Climate research reveals shifting cloud cooling effects and rising UV levels Recent studies show low clouds have mitigated global warming for 47 years, though this effect may reverse. Meanwhile, UV radiation levels capable of causing skin redness are rising across Europe. 2 sources. https://clstr.news/cluster/climate-research-reveals-shifting-cloud-cooling-effects-and-rising-uv-levels ### 2026-09-16: UV radiation increases across Europe due to declining cloud cover Studies of European meteorological stations show a 26% increase in UV-B radiation over the last decade, primarily driven by decreasing cloud cover rather than changes in the ozone layer. 2 sources. https://clstr.news/cluster/uv-radiation-increases-across-europe-due-to-declining-cloud-cover --- Cite as: Rising UV radiation and declining cloud cover in Europe. CLSTR, https://clstr.news/situations/rising-uv-radiation-and-declining-cloud-cover-in-europe