As a result of limited satellite observations of sea ice thickness (for more information: Sea Ice Thickness Data Sets: Overview and Comparison), few climate modeling experiments have isolated the role of
changing sea ice thickness.
Not exact matches
Although CryoSat - 2 is designed to measure
changes in the
ice sheet elevation, these can be translated into horizontal motion at the grounding line using knowledge of the glacier and
sea floor geometry and the Archimedes principle of buoyancy — which relates the
thickness of floating
ice to the height of its surface.
New way of measuring
sea ice thickness could help assess how
sea ice is affected by climate
change
From an altitude of just over 700 km, CryoSat will precisely monitor
changes in the
thickness of
sea ice and variations in the
thickness of the
ice sheets on land.
The
sea ice component represents
sea ice in multiple categories of
thickness and accounts for
changes in
thickness due to growth and melt as well as mechanical deformation of
ice (Thorndike et al. 1975, Hibler 1980).
The magnitude and spatial distribution of the high - latitude climate
changes can be strongly affected by
sea ice characteristics, but evaluation of
sea ice in models is hampered by insufficient observations of some key variables (e.g.,
ice thickness)(see Section 4.4).
Although CryoSat - 2 is designed to measure
changes in the
ice sheet elevation, these can be translated into horizontal motion at the grounding line using knowledge of the glacier and
sea floor geometry and the Archimedes principle of buoyancy — which relates the
thickness of floating
ice to the height of its surface.
On the text on the extent of Arctic
sea ice, the UK asked about
changes in Arctic
sea ice thickness and the US about summer
sea ice extent, to which the CLAs replied that this information is discussed in detail in the underlying assessment.
Stéphanie Jenouvrier, a biologist at the Woods Hole Oceanographic Institution in the US, and colleagues from France and the Netherlands report in Nature Climate
Change that
changes in the extent and
thickness of
sea ice will create serious problems for a flightless, streamlined, survival machine that can live and even breed at minus 40 °C, trek across 120 kilometres of
ice, and dive to depths of more than 500 metres.
THERE HAS BEEN A WARMING TREND FROM THE 70s THRU THE LATE 90s,... accompanied by other
changes tied to a warming trend (record low arctic
sea ice extent &
thickness, retreating glaciers, retreating snow lines, warming ocean surface temps, increases in
sea height, de-alkalinizing oceans).
Sea ice thickness and spatial extent
change rapidly in response to seasonal
changes and in response to longer - term climate
changes.
Changes in
sea ice extent, timing,
ice thickness, and seasonal fluctuations are already having an impact on the people, plants, and animals that live in the Arctic.
Our results stress the importance of considering loss of
sea ice thickness in future climate
change assessments.
The modeled evolution of Arctic
sea ice volume appears to be much stronger correlated with
changes in
ice thickness than with
ice extent as it shows a similar negative trend beginning around the mid-1990s.
Maslowski's recent, peer - reviewed work (Maslowski W., Clement Kinney J., Higgins M., Roberts A. (2012) «The Future of Arctic
Sea Ice», The Annual Review of Earth and Planetary Sciences, 40: 625 - 654) emphasizes «the need for detailed analyses of changes in sea ice thickness and volume to determine the actual rate of melt of Arctic sea ice&raqu
Sea Ice», The Annual Review of Earth and Planetary Sciences, 40: 625 - 654) emphasizes «the need for detailed analyses of changes in sea ice thickness and volume to determine the actual rate of melt of Arctic sea ice&raqu
Ice», The Annual Review of Earth and Planetary Sciences, 40: 625 - 654) emphasizes «the need for detailed analyses of
changes in
sea ice thickness and volume to determine the actual rate of melt of Arctic sea ice&raqu
sea ice thickness and volume to determine the actual rate of melt of Arctic sea ice&raqu
ice thickness and volume to determine the actual rate of melt of Arctic
sea ice&raqu
sea ice&raqu
ice».
Poitou & Bréon do not explain why the
ice pack volume would be relevant for the albedo; according to Haas (2005)[47] the
changes of the
thickness of the
sea ice are small since they are correctly measured by an airborne radio apparatus, only over the Arctic.
Walt Meier Research Scientist, Cryospheric Sciences Lab, NASA Goddard Space Flight Center Specialties:
Sea ice remote sensing; changes in sea ice concentration, extent, motion, thickness and age; development of sea ice climate data records; interaction of sea ice and clim
Sea ice remote sensing;
changes in
sea ice concentration, extent, motion, thickness and age; development of sea ice climate data records; interaction of sea ice and clim
sea ice concentration, extent, motion,
thickness and age; development of
sea ice climate data records; interaction of sea ice and clim
sea ice climate data records; interaction of
sea ice and clim
sea ice and climate
Projected
changes in climate should produce large reductions in the extent,
thickness, and duration of
sea ice.
As such, monitoring Arctic
ice thickness may be useful for predicting rapid
changes in
sea ice.
Perovich, D., J. Richter - Menge, B. Elder, T. Arbetter, K. Claffey, and C. Polashenski, Observing and understanding climate
change: Monitoring the mass balance, motion, and
thickness of Arctic
sea ice, http://IMB.crrel.usace.army.mil, 2014.
Based on the understanding of both the physical processes that control key climate feedbacks (see Section 8.6.3), and also the origin of inter-model differences in the simulation of feedbacks (see Section 8.6.2), the following climate characteristics appear to be particularly important: (i) for the water vapour and lapse rate feedbacks, the response of upper - tropospheric RH and lapse rate to interannual or decadal
changes in climate; (ii) for cloud feedbacks, the response of boundary - layer clouds and anvil clouds to a
change in surface or atmospheric conditions and the
change in cloud radiative properties associated with a
change in extratropical synoptic weather systems; (iii) for snow albedo feedbacks, the relationship between surface air temperature and snow melt over northern land areas during spring and (iv) for
sea ice feedbacks, the simulation of
sea ice thickness.
The time constants of albedo feedback from melting N America snow cover are shorter than the albedo feedback from melting Arctic
sea ice, and the
sea ice is
changing response as its average
thickness decreases, and the ratios of 1, 2, 3, 4, 5 year
ice area
changes.
With regard to proxy studies, same basic questions, are these direct or passive correlations, what evidence that tree ring core
thickness depends only on temperature (what about precipitation, cloud cover, volcanic activity,
sea surface temperatue
changes,
sea current
changes, solar irradiance
changes, cloud cover, etc.) How are these variables accounted for when analysis of
ice cores is completed, or for that matter when computer models, and / or proxy studies are completed.
And scientists from NASA recently flew a series of missions over the Arctic during the IceBridge project, to study details of Arctic
sea ice thickness as well as
changing glaciers in Greenland.
Global Climate
Change Record 10 - 19 % Declines Seen in Arctic
Sea Ice Thickness Last Winter, Satellite Data Reveals Argentine Glacier (Perito Moreno) Breaks in Winter for the First Time Ever OK Grasshopper, This Is What You SHOULD Have Done to Prepare
Trends in
sea ice thickness / volume are another important indicator of Arctic climate
change.