Sea level is rising

Satellites have been measuring global sea level since 1992[[Cazenave, A., and R. S. Nerem. “Present-day sea level change: Observations and causes.” (Abstract) Reviews of Geophysics 42 (2004).]] — and during this time, seas have been rising roughly 1.2 inches per decade.[[National Oceanic and Atmospheric Administration Center for Satellite Applications and Research.]] Tidal gauge records from around the world suggest that this continues an earlier, milder trend — about 0.7 inches per decade from 1961-2003.[[Bindoff, N.L., J. Willebrand, V. Artale, A, Cazenave, J. Gregory, S. Gulev, K. Hanawa, C. Le Quéré, S. Levitus, Y. Nojiri, C.K. Shum, L.D. Talley and A. Unnikrishnan, 2007: Observations: Oceanic Climate Change and Sea Level. In: Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change [Solomon, S., D. Qin, M. Manning, Z. Chen, M. Marquis, K.B. Averyt, M. Tignor and H.L. Miller (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA.]]

Scientists have linked these changes to global warming, and project accelerating sea level rise into the future, tied to further anticipated warming.   

Sea level is increasing at different rates in different regions (Georgia's sea level rate). Regional differences come about because of locally sinking or rising land, patterns in ocean currents or regional differences in how much the ocean is warming.[[Cazenave, A., and R. S. Nerem. “Present-day sea level change: Observations and causes.” (Abstract) Reviews of Geophysics 42 (2004).]]

There is already evidence for global increases in extreme high water during storm surges,[[Bindoff, N.L., J. Willebrand, V. Artale, A, Cazenave, J. Gregory, S. Gulev, K. Hanawa, C. Le Quéré, S. Levitus, Y. Nojiri, C.K. Shum, L.D. Talley and A. Unnikrishnan, 2007: Observations: Oceanic Climate Change and Sea Level. In: Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change [Solomon, S., D. Qin, M. Manning, Z. Chen, M. Marquis, K.B. Averyt, M. Tignor and H.L. Miller (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA.]] as well as increasing salinity in estuaries and associated harms to salt marsh plant life.