In this study, we conduct sensitivity experiments to isolate the role
of sea ice thickness on the atmospheric circulation.
«It may even be possible to predict sea ice cover a year in advance with high - quality
observations of sea ice thickness and snow cover over the whole Arctic,» said Cecilia Bitz, co-author and professor of atmospheric sciences at the University of Washington.
Ship
reports of sea ice thickness will help evaluate the vulnerability of the first - year and second - year ice to solar and ocean heating.
Instead, we are interested in isolating the
role of sea ice thickness on the atmosphere and quantifying its contribution compared to sea ice concentration.
Our model experiments demonstrate that the response to loss
of sea ice thickness reinforces the effect of loss of sea ice concentration in the troposphere.
The research involved measurements
of sea ice thickness made by upward - looking sonar aboard naval submarines operating under the ice sheet.
To make use of that potential we would need good
estimates of sea ice thickness, such as might be obtained from ICESat or CryoSat (i.e., complete spatial coverage).
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.
Overall, we conduct five different experiments using WACCM4 to compare the atmosphere responses to loss of sea ice concentration (SIC),
loss of sea ice thickness (SIT), and their combined effect (NET).