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Positive Altitude

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Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
Positive Altitude
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At least since 1880, the average global sea level has been rising. This is due mostly to anthropogenic global warming that is driving the thermal expansion of seawater while melting land-based ice sheets and glaciers. This trend is expected to accelerate during the 21st century.Projecting future sea level has always been challenging, due to our imperfect understanding of many aspects of the climate system. As climate research leads to improved computer models, projections have consistently increased. For example, in 2007 the high end of Intergovernmental Panel on Climate Change projections through 2099 was less than 2 feet , but in their 2014 report the high end was considered to be about 3 feet . A number of later studies have concluded that 2.0 to 2.7 metres rise this century is physically plausible. The contributions to sea level rise since 1993, based on 2018 figures, divide into ocean thermal expansion , melting of temperate glaciers , Greenland and Antarctica .Sea level rise will not be the same at every location on earth, with some locations even getting a drop in sea levels. Local factors include tectonic effects, and subsidence of the land, tides, currents and storms. Sea level rise is expected to continue for centuries. Because of long response times for parts of the climate system, it has been estimated that we are committed to a sea-level rise of approximately 2.3 metres within the next 2,000 years for each Celsius degree of temperature rise.Sea level rises can considerably influence human populations in coastal and island regions and natural environments like marine ecosystems. Widespread coastal flooding would be expected if several degrees of warming is sustained for millennia. For example, sustained global warming of more than 2 C° relative to pre-industrial levels could lead to eventual sea level rise of about 1–4 metres .Societies can respond to sea level rise in three different ways: retreat, accommodate and protect. Sometimes these adaptation strategies go hand in hand, but at other times choices have to be made between different strategies. Ecosystems that adapt to rising sea levels by moving inland might not always be able to do so, due to natural or man made barriers.
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