The albedo of Arctic sea ice depends greatly on the formation of melt ponds. These ponds form in depressions on the ice as surface snow melts during the summer months, and their location is determined mainly by the initial snow topography. Using a high resolution sea ice model forced with...
High-resolution turbulence simulations are used to examine the importance of melt
pond geometry in setting pond growth rates and albedo. Modeling the circulation of
water in melt ponds using large-eddy simulation shows that both convective and windforced
conditions generate well-mixed ponds, suggesting that stratification is not a
significant factor in...
A melt pond model is presented that predicts pond size and depth changes, given an
initial ice thickness field and representative surface fluxes. The model is based on the
assumption that as sea ice melts, fresh water builds up in the ice pore space and eventually
saturates the ice. Under...
The fact that African Americans are under represented in the natural
resource professions is well known and commonly acknowledged. Terms such
as conspicuously absent, manifest imbalance and zero representation have all
been used to describe the current status of African American natural resource
professionals. The data suggests that in the...
Most of the period of my visit was spent working in the turbulence
section of the Institute of Atmospheric Physics. Brief visits were made
to the Institute of Oceanology, Academy of Sciences in Moscow, to some
departments of Moscow State University, and to one department of the
Institute of Oceanology...
The thesis describes the properties of surface wind and air
temperature time series recorded at three locations on the pack ice
of the Beaufort Sea. Time series consisting of sequential one-half
hourly means were constructed for a period of approximately a year.
A diurnal fluctuation in air temperature is found...
During summer 2007, perennial sea ice in the Beaufort Sea, Arctic Ocean, experienced an unprecedented amount of basal melt. It has previously been shown that this basal melt was linked to an increase in open-water fraction, increasing absorption of solar radiation into the ocean. GPS ice drifters, deployed around the...
The net mass balance fluctuations of Arctic and Sub-Arctic glaciers, north of 47.5°
North latitude, are described over a 45-year period from 1957 to 2002 using two
parameters derived from a gridded climatology reanalysis. Variability among 185
measured glaciers was represented according to two main components. The first
component represents...