IPCC synthesis reports offer conservative projections
of sea level increase based on assumptions about future behavior of ice sheets and glaciers, leading to estimates of sea level roughly following a linear upward trend mimicking that of recent decades.
The ice stream's speed - up and near - doubling of ice flow from land into the ocean has increased the rate of sea level rise by about.06 millimeters (about.002 inches) per year, or roughly 4 percent of the 20th century
rate of sea level increase.
There is no good reason to worry about anthropogenic green house gases causing a 4C temp rise or «meters»
of sea level increase any time soon.