3.2 Millimeters: A Troubling Rise In Sea Level
(Click to enlarge) 6 Meter Sea Level Rise: Countries at Risk with 2°C of Warming. (Credit: Climate Central)
Sea levels are rising, and rising faster every year.
(From the New York Times / by Nicholas Bakalar) — According to the latest report of the Intergovernmental Panel on Climate Change, sea levels rose an average of 1.7 millimeters a year during the 20th century. Some areas have had larger rises than others, and measurements vary from year to year at different locations. Measuring sea level is difficult. Scientists use tidal gauges and satellite altimeter data to measure these changes, and there are some questions about the precision of these tools. Variations in land level complicate matters further; it is often difficult to distinguish rising seas from falling land. And as water warms, it expands. Still, there is no question about the basic facts. Since 1993, the average rate of increase has nearly doubled, to 3.2 millimeters a year. The retreat of glaciers and the melting of the Greenland ice sheet have contributed to these accelerating increases. Extreme sea levels during storm surges like that of Hurricane Sandy in 2012 have increased since 1970, mainly the result of rising seas.
Read the full article here: http://www.nytimes.com/2015/12/01/science/3-2-millimeters-a-troubling-rise-in-sea-level.html?ref=topics&_r=1