A key question has long been
whether ice sheet contribution could accelerate substantially, by an order of magnitude, either in this century or subsequently.
@ 1 Paul S. Most assessments
of ice sheet contribution to sea level rise indicate an acceleration over the past decade, whereas altimeter - measured SLR has not been faster over the most recent decade There was a paper published within the last couple of years by some of this sites contributors that suggested part of the disparity may be due to an increase in land based water.
The AR5 concluded that the observational sea level budget can not be rigorously assessed for 1901 — 1990, due to insufficient observational information to
estimate ice sheet contributions with high confidence before the 1990s; in addition ocean data sampling is too sparse to permit an estimate of global - mean thermal expansion before the 1970s.
The greater spread between RCPs indicated a greater role for emissions
in ice sheet contribution to sea level rise (Kopp et al. 2017).
The findings «lend support to our confidence in recent estimates of sea level rise and the
increasing ice sheet contribution,» said Michael Oppenheimer, the Albert G. Milbank professor of geosciences and international affairs at Princeton University's department of geosciences, in an email to The Post.
«By processing the historical archive acquired by the Danish during the last century, they were able to provide an estimation of
the ice sheet contribution to sea - level rise since 1900, which was critically missing in the last IPCC report,» noted Jeremie Mouginot, a climate scientist at the University of California, Irvine.
Just as with Antarctica, Greenland's
ice sheet contribution to rising sea levels is continuously and rapidly growing.
Machens: Hansen (2007), assumed
an ice sheet contribution of 1 cm for the decade 2005 — 15, with a potential ten year doubling time for sea - level rise, based on a nonlinear ice sheet response, which would yield 5 m this century.
IMBIE is an international collaboration of polar scientists, providing improved estimates of
the ice sheet contribution to sea level rise.
Additional contributions from glaciers and
ice sheet contributions to future sea level rise are uncertain but may equal or exceed several meters over the next millennium or longer.
Consequently,
ice sheet contribution to sea level rise — even if it were the same amount — would have different impacts, depending on whether the contribution came from Greenland or Antarctica (Bamber and Riva 2010).
The key question is whether
the ice sheet contribution could accelerate substantially (e.g., by an order of magnitude) either in this century or subsequently.