In deriving elevation change rates (dH/dt) from radar altimetry, the slope-induced error is usually assumed to cancel out in repeat measurements. These measurements, however, represent a location that can be significantly further upslope than assumed, causing an underestimate of the basin-integrated volume change. In a case-study for the fast-flowing part of Jakobshavn Isbr', we show that a relatively straightforward correction for slope-induced error increases elevation change rates by up to several metres per year and significantly reduces the volume change error with respect to laser altimetry for the area of interest.
|Translated title of the contribution||Importance of slope-induced error correction in volume change estimates from radar altimetry|
|Number of pages||5|
|Publication status||Published - 2012|
- GREENLAND ICE-SHEET
- CONTINENTAL ICE
- ELEVATION CHANGES
- LASER ALTIMETRY