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Panel on Climate Change’s (IPCC) most recent projections for 21st century average global temperature increase is 2-11°F, based on the spread across a large number of climate models and assumptions about future greenhouse gas emissions. Regional warming may be greater or less than the global average. For example, temperature increases in the United States are projected to be approximately 30 percent higher than the global average. The Arctic is likely to experience the greatest warming and has already been warming at twice the global rate.
Recent sea level rise studies have projected that water levels could rise between 1.5 and 6 feet by the end of this century,
depending on the rate and magnitude of future warming. Global precipitation patterns will also be altered by temperature increases. Generally, the hydrological cycle is expected to accelerate leading to increases in precipitation at the global level. However, these global increases are likely to be very unevenly distributed with wet areas continuing to get wetter while dry regions may experience a decrease in precipitation.
Source: Center for Climate and Energy Solutions