Not exact matches
During the later period, when there was less
sea ice, the whales dove significantly longer and deeper than
in the earlier period — presumably
in search of prey as the animals,
in turn,
changed their habits because of
different ocean conditions brought on by
sea ice loss.
Natural climate variability of the Arctic atmosphere, the impact of Greenland and PBL stability
changes K. Dethloff *, A. Rinke *, W. Dorn *, D. Handorf *, J. H. Christensen ** * AWI Potsdam, ** DMI Copenhagen Unforced and forced long - term model integrations from 500 to 1000 years with global coupled atmosphere - ocean -
sea -
ice models have been analysed
in order to find out whether the
different models are able to simulate the North Atlantic Oscillation (NAO) similar to the real atmosphere.
More ground turns from white reflective snow to black, heat absorbant dirt.The same effect occurs as
sea ice is lost.The corals blanch, and, as I stated last year on this site, the shutdown of the north Atlantic current will occur, since the salinity level studies I spoke of last year, off Greenland, continue to show that the upwelling mechanisms driving the North Atlanic current are
in severe jeapordy, because the
change in salinity levels effects the driver of the current, the upwelling and downwelling of
different salinity levels off Greenland.
Robert Bindschadler of NASA and Tad Pfeffer at the University of Colorado, both glacier specialists, told me that they saw scant evidence that a yards - per - century rise
in seas could be produced from the
ice sheets that currently cloak Greenland and West Antarctica, which are very
different than what existed
in past periods of fast
sea - level
changes.
However, if the loss of Arctic
Sea ice has significantly
changed global atmospheric circulation patterns, then we are dealing with a
different system that has only been
in existence since 2007, and we do not know how often to expect crop failures.
However, the atmospheric circulation
change linked to the reduction of
sea ice shows much broader meridional meanders
in mid-latitudes and clearly
different interannual variability than the classical Arctic Oscillation.
Diminishing Arctic
sea ice can cause
changes in atmospheric circulation that lead to a circulation pattern that is
different than the «negative phase» of the Arctic Oscillation.
If clouds are allowed to
change (and
changes in sea -
ice are suppressed),
different climate models give answers ranging from 1.5 to 4.5 C for the warming due to doubling CO2.
These new
sea ice proxy records are needed (1) to fully prove the scenarios of a succession from an extended
ice shelf to polynya / open - water conditions (cf., Fig. 6), (2) to reconstruct
in more detail the
changes in sea ice cover for early, middle and late LIG intervals characterized by very
different external forcings and related internal feedback mechanisms, and (3) to allow a more fundamental proxy data / modeling comparison that results
in model improvements and better reproduction of the LIG climatic evolution and prediction of future climatic scenarios20, 21,22,23, 64.
The video shows so many
different processes at
different scales, from natural processes (annual
changes in snow cover and the Vatnajökull ash plume) to climate
change related
changes (e.g. the long term decrease
in sea ice).
The three studies, using
different methodologies to estimate the global surface albedo feedback associated with snow and
sea ice changes, all suggest that this feedback is positive
in all the models, and that its range is much smaller than that of cloud feedbacks.
Uncertainties should decrease closer to near - current dates (e.g. from denser and more accurate sampling)-- but note that these products also employ
different QC and analysis methods, rely to varying degrees on satellite data, on
sea -
ice data to constrain polar SST, and on bias adjustments for historical
changes in measurement methods.