Glacial Sections near Bridlington

Numerical simulation of the evolution of glacial valley cross sections

A numerical model was developed for simulating the formation of U-shaped glacial valleys by coupling a two-dimensional ice flow model with an erosion model for a transverse cross section. The erosion model assumes that the erosion rate varies quadratically with sliding speed. We compare the two-dimensional model with a simple shallow-ice approximation model and show the differences in the evolu...

→ tt̄ Total and Differential Cross Sections Near Threshold

Charm and Bottom Quark Production Cross Sections Near Threshold

The cross sections for charm and bottom quark production in the threshold region are discussed. We consider the effects of an all order resummation of initial state soft-plus-virtual gluon radiation on the total cross sections compared to the order αs results. This work was supported in part by the Director, Office of Energy Research, Division of Nuclear Physics of the Office of High Energy and...

Near-synchronous interhemispheric termination of the last glacial maximum in mid-latitudes.

Isotopic records from polar ice cores imply globally asynchronous warming at the end of the last glaciation. However, 10Be exposure dates show that large-scale retreat of mid-latitude Last Glacial Maximum glaciers commenced at about the same time in both hemispheres. The timing of retreat is consistent with the onset of temperature and atmospheric CO2 increases in Antarctic ice cores. We sugges...

Impact of fjord dynamics and glacial runoff on the circulation near Helheim Glacier

Submarine melting is an important contributor to the mass balance of tidewater glaciers in Greenland, and has been suggested as a trigger for their widespread acceleration. Our understanding of this process is limited, however. It generally relies on the simplified model of subglacial discharge in a homogeneous ocean, where the melting circulation consists of an entraining, buoyant plume at the...