With 1.5☌ of warming, this risk is lowered to 4 percent of Earth’s land area. For example, under 2☌ of warming, 13 percent of the Earth’s land area is projected to witness biome shifts (such as changing from tundra to forest), or transformation. Terrestrial EcosystemsĮcosystems are expected to transform with greater warming. Other factors that lead to losses of species, such as forest fires and the spread of pests and diseases, also decrease if warming stays at 1.5☌. With 1.5☌ of warming, this is reduced by two-thirds for insects, and by half for plants and vertebrates.
Species LossĪt 2✬ warming, 18 percent of insects globally, 16 percent of plants and 8 percent of vertebrates are projected to lose more than half of their ranges. Up to 79 million could be exposed under 2☌ of warming.Īlso, if the rate of sea level rise is slower, there can be more opportunities for communities to adapt. With 1.5☌ of warming by 2100, up to 69 million people could be exposed to flooding (assuming no adaptation and current population). The risk of flooding is also greater with a higher temperature rise. With 1.5☌ of warming, sea level rise would be 0.4 meters (1.3 feet) in 2100, compared to levels in 1986-2005. This can lead to more heat being absorbed, impacts to ocean circulation, and have consequence for winter weather in the Northern hemisphere. With 1.5☌, the report finds it is very likely to have one sea-ice-free summer every 100 years at 2☌, the frequency increases to at least one every 10 years. While 1.5☌ can lead to increased runoff and floods in some regions compared to today’s conditions, 2☌ could lead to even more. High latitude and mountainous regions, as well as Eastern Asia and Eastern North America, are projected to experience heavier precipitation under 2☌ of warming than under 1.5☌. The World Is On Track to Exceed its "Carbon Budget" in 12 Years.8 Things You Need to Know About the IPCC 1.5☌ Report.For a deeper dive on the latest IPCC report, check out our other blog posts:
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