Eos, Transactions American Geophysical Union

Arctic Ocean tides measured by satellite

Authors


Abstract

The Gravity Recovery and Climate Experiment (GRACE) measures Earth's gravity field by gauging the acceleration of two satellites that travel about 220 kilometers apart—slight differences in acceleration between the two satellites provide information about the distribution of mass below the satellites. To get an accurate picture of Earth's gravity field, it is necessary to know how tides are contributing to GRACE measurements. However, tidal corrections have usually been made using data from satellite altimeters that do not cover the Arctic. To get around this problem, Killett et al. developed a new method of analyzing GRACE data that enabled them to extract Arctic Ocean tides. They suggest that applying their method could help improve GRACE data processing. (Journal of Geophysical Research-Oceans, doi:10.1029/2011JC007111, 2011)