Brief communication: "Importance of slope-induced error correction in volume change estimates from radar altimetry"

Abstract

In deriving elevation change rates (d H /d t) 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 Isbräsquf;, 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. © Author(s) 2012. CC Attribution 3.0 License.