Electrical Resistivity Measurements on Ice Sheets

Ice sheets and nitrogen.

Snow and ice play their most important role in the nitrogen cycle as a barrier to land-atmosphere and ocean-atmosphere exchanges that would otherwise occur. The inventory of nitrogen compounds in the polar ice sheets is approximately 260 Tg N, dominated by nitrate in the much larger Antarctic ice sheet. Ice cores help to inform us about the natural variability of the nitrogen cycle at global an...

Vanishing Polar Ice Sheets

Global temperatures have increased by 0.8◦C since instrumental records began, and the last decade has been the warmest. This warming has been closely linked to increasing greenhouse gas concentrations due to human activities. Arctic warming is leading to thinning and disappearance of sea ice on the Arctic Ocean and the increased melting of the Greenland ice sheet. In the last decade the Antarct...

ELECTRICAL RESISTIVITY OF NpTe

Electrical Resistivity and Magnetization Measurements on the Heavy Fermion Superconductor Pros 4 Sb 12

The filled skutterudite compound PrOs4Sb12, the first example of a Pr-based heavy fermion superconductor, displays superconductivity with Tc ∼ 1.85 K and has an effective mass m ∗ ∼ 50 me, where me is the free electron mass. For magnetic fields above 4.5 T, sharp features in the normal state electrical resistivity, magnetization, specific heat, and thermal expansion data suggest the occurrence ...

Ice sheets and sea level.