Subglacial Lake Recharge by Surface Meltwater in Northeast Greenland

January 21, 2015: PGC researchers are part of a national team of scientists that has published a new paper showing for the first time that meltwater from the surface of an ice cap in northeastern Greenland can make its way beneath the ice and become trapped, refilling a subglacial lake. This meltwater provides heat to the bottom of the ice sheet. These groundbreaking findings provide new information about atmospheric warming and its affect on the critical zone at the base of the ice. The warmth provided by the water could make the ice sheet move faster and alter how it responds to the changing climate.

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Mapping emperor penguins by satellite

April 13, 2012: Three PGC researchers, together with international collaborators, have published a groundbreaking study that shows there are more than twice as many emperor penguins in Antarctica as previously thought. Co-author and PGC researcher Michelle LaRue hastens to point out that this doesn't necessarily mean the penguin population has grown. Rather, the counting method used in this study — analyzing satellite imagery to measure the population of penguins' remote colonies — provides a higher level of accuracy, and it is likely that previous counts were simply off. The research, LaRue says, provides a baseline for assessing the species' health in the future, and a model for tracking and counting other poorly understood species.

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