Figure 4-1 Annual global mean temperature anomalies relative to the pre-industrial (1850-1900) baseline, 1850-2024
over 1960-2005. Ocean warming is fueling degradation of marine ecosystems, biodiversity loss, and rise of sea levels. The global mean sea increased worldwide. In recent years, extreme record (from 1993 to present). The long-term rate of sea-level rise has more than doubled. increasing from 2.1 mm per year between 1993 dented disasters in many parts of the world, and 2002 to 4.7 mm per year between 2015 such as rainstorms, foods, droughts, and wild- and 2024 (WMO, 2025a). The sea levels, rising fires, led to the highest number of new displace- faster than expected, pose a threat to the living ments recorded in a year since 2008 (WMO, environment. Tuvalu, a Pacific Island nation 2025a). It is predicted that by 2030, the fre- level, could be submerged by seawater in 25 years. Tuvalu has become the first country in Tropical cyclones have become frequent. In the world to begin a planned migration of itsSeptember 2024, Typhoon Yagi crossed the entire population in response to climate change. Philippines, southern China, Viet Nam, Laos.