A new study finds disproportionate effects of temperature shifts on an icy glacier layer. Scientists have known from ice core research that it's easier to melt an ice sheet than to freeze it up again.

ROSE VALLEY >> Mayor Tim Plummer opened the reorganization meeting by administering the oath of office to returning council members Dave Firn, Al Meyer and Stephanie Middleton, then conducted ...

Figure 1: Ethane mixing ratios in firn air at three sites, and the atmospheric histories derived from these measurements. Figure 2: Ethane source emissions and the resulting atmospheric histories.