An ongoing shift in Pacific Ocean sea level. Twentieth-century global-mean sea level rise: Is the whole greater than the sum of the parts? Journal of Climate 26(13):4,476–4,499. Journal of Geophysical Research 115, C10009. Comment on “Response of the global ocean to Greenland and Antarctic ice melting” by D. Australia’s unique influence on global sea level in 2010–2011. Midgley, eds, Cambridge University Press, Cambridge, UK, and New York, NY, USA.įasullo, J.T., C. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Chapter 13 in Climate Change 2013: The Physical Science Basis. Preliminary observations of global ocean mass variations with GRACE. The 2011 La Niña: So strong, the oceans fell. On the early response of the climate system to a meltwater input from Greenland. ISSM-SESAW v1.0: Mesh-based computation of gravitationally consistent sea level and geodetic signatures caused by cryosphere and climate driven mass change. The planned observing system will be capable of monitoring the regional variability of sea level change, which should help improve future projections.Īdhikari, S., E.R. The current ocean observing system, including radar and laser altimeters, satellite gravity missions, and the Argo network of profiling floats, has demonstrated the ability to close the sea level budget since 2005, confirming the contributions of ice sheets to contemporary sea level rise. On time scales from months to decades, the addition of freshwater at high latitudes will alter the mean ocean circulation through a variety of mechanisms that will also alter regional rates of sea level change. The transfer of water mass from the ice sheets to the ocean will alter Earth’s gravity field and rotation, resulting in local changes in sea levels. While it is well known that the accelerating melting of the ice sheets of Greenland and Antarctica will increasingly raise global mean sea levels, it is less widely understood how the addition of meltwater from these ice sheets will affect regional patterns of sea level rise. Once logged in, click the "download data" button on this page to access the data.= , * You now need to create an Earthdata account to access NASA’s sea level data. The data shown are the latest available, with a four- to five-month delay needed for processing. These items are displayed at the time they were affecting sea level. Items with pluses (+) are factors that cause global sea level to increase, while minuses (-) are what cause sea level to decrease. The second graph, which is from coastal tide gauge and satellite data, shows how much sea level changed from about 1900 to 2018. The first graph tracks the change in global sea level since 1993, as observed by satellites. Sea level rise is caused primarily by two factors related to global warming: the added water from melting ice sheets and glaciers, and the expansion of seawater as it warms. Global sea levels are rising as a result of human-caused global warming, with recent rates being unprecedented over the past 2,500-plus years.
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