Antarctic non-stationary signals derived from Seasat-ERS-1 altimetry comparison

Frédérique Rémy, Benoit Legrésy
1998 Annals of Glaciology  
Geographical changes in the height of the Antarctic ice sheet between 1978 and 1992 are mapped using altimeter data from Seasat and ERS-1 via an inverse technique that allows us to take imo account the whole altimctric error budget. in a belt between 70° and 72° S and between 150° and 80° E, a precision better than 40 cm is found for the surface elevation change, while the change in height averaged in the along-slopc direction has a precision of around 10-20 cm, leading to a precision better
more » ... n 10% of the mass balance. These data suggest a relative positive imbalance of around 20% in this sector for the western and high-altitude areas, and a relative negative imbalance in some areas of lower altitude.
doi:10.3189/1998aog27-1-81-85 fatcat:u6r7emzc5ffg7phqnkcomneuwu