Working in University Valley, Antarctica (IMAGE) McGill University Caption The average daily air temperature in the Antarctic summer of 2013, when Goordial collected the permafrost samples which she tested both on the spot and later in the lab, was -14 °C and it never rose above 0 °C, making the permafrost difficult to drill. Credit Jackie Goordial Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.