Time takes on a new meaning in the field. Every moment is compressed in order to gain maximum yield. Applying human accounting, field time is limited by available resources, personnel, and funds, while using nature’s accounting the limits shift to windows of weather, and seasonality for ice phenomena. In the field both human and nature can conspire for or against you. A seasoned field crew learns to take advantage of every break from the planned work schedule to rethink, refine and reprogram their instruments and data collection.
After four days of intense commitment on the part of the flight crew, and the NASA and Wallops teams, the plane has traversed over 4450 miles round trip, spent two days under repair and will arrive back within hours. While the instrument teams await the return of the P-3 they work through data, check on equipment and ensure that all systems remain ready to begin as soon as IceBridge flights resume.
Lamont’s teams are responsible for the gravity and magnetics equipment. Gravity and magnetics are windows to the geology beneath the ice. The gravity measures density telling us of changes in structure or material beneath the ice sheet which result in a change in gravitational attraction or pull. Gravity is useful for locating changes but magnetics helps us ‘see’ more of what is under the ice, distinguishing between the low magnetic strength of soft mounds of sediment, to high magnetic strength of volcanic basalts. Understanding the Earth below is important in predicting future glacial movement and speed.