Climate Update
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Climate change is upon us, and almost every facet of California’s natural and built environment is being affected. Increasing global temperatures are causing significant effects at global, regional, and local scales. In the past century, average global temperature has increased by about 0.8°C (1.4°F), and average global sea level has increased by 17 to 21 centimeters (7 to 8 inches) (IPCC, 2013). Sea level at the San Francisco tidal gauge has risen 20 centimeters (8 inches) over the past century, and the National Research Council projected that sea level may rise by as much as 140-165 centimeters (55-65 inches) in California by 2100 (NRC, 2012). The Coastal Commission has developed this guidance to help California’s coastal communities prepare for the effects of sea-level rise.
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