Yes, there is strong evidence that global sea level gradually
rose in the 20th century and is currently rising at an increased
rate, after a period of little change between AD 0 and AD 1900.
Sea level is projected to rise at an even greater rate in this century.
The two major causes of global sea level rise are thermal expansion
of the oceans (water expands as it warms) and the loss of
land-based ice due to increased melting.
"Observations:Oceanic Climate Change and Sea Level
Coordinating Lead Authors:
Nathaniel L. Bindoff (Australia), Jürgen Willebrand (Germany)
Vincenzo Artale (Italy), Anny Cazenave (France), Jonathan M. Gregory (UK), Sergey Gulev (Russian Federation), Kimio Hanawa (Japan),
Corrine Le Quéré (UK, France, Canada), Sydney Levitus (USA), Yukihiro Nojiri (Japan), C.K. Shum (USA), Lynne D. Talley (USA),
Alakkat S. Unnikrishnan (India)
J. Antonov (USA, Russian Federation), N.R. Bates (Bermuda), T. Boyer (USA), D. Chambers (USA), B. Chao (USA), J. Church (Australia),
R. Curry (USA), S. Emerson (USA), R. Feely (USA), H. Garcia (USA), M. González-Davíla (Spain), N. Gruber (USA, Switzerland),
S. Josey (UK), T. Joyce (USA), K. Kim (Republic of Korea), B. King (UK), A. Koertzinger (Germany), K. Lambeck (Australia),
K. Laval (France), N. Lefevre (France), E. Leuliette (USA), R. Marsh (UK), C. Mauritzen (Norway), M. McPhaden (USA), C. Millot (France),
C. Milly (USA), R. Molinari (USA), R.S. Nerem (USA), T. Ono (Japan), M. Pahlow (Canada), T.-H. Peng (USA), A. Proshutinsky (USA),
B. Qiu (USA), D. Quadfasel (Germany), S. Rahmstorf (Germany), S. Rintoul (Australia), M. Rixen (NATO, Belgium), P. Rizzoli (USA, Italy),
C. Sabine (USA), D. Sahagian (USA), F. Schott (Germany), Y. Song (USA), D. Stammer (Germany), T. Suga (Japan), C. Sweeney (USA),
M. Tamisiea (USA), M. Tsimplis (UK, Greece), R. Wanninkhof (USA), J. Willis (USA), A.P.S. Wong (USA, Australia), P. Woodworth (UK),
I. Yashayaev (Canada), I. Yasuda (Japan)