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	Author	Duncan A. Young, Laura E. Lindzey, Donald D. Blankenship, Jamin S. Greenbaum, Alvaro Garcia De Gorordo, Scott D. Kempf, Jason L. Roberts, Roland C. Warner, Tas Van Ommen, Martin J. Siegert, Emmanuel Le Meur
	Title	Land-ice elevation changes from photon-counting swath altimetry: first applications over the Antarctic ice sheet			Type	Journal
	Year	2015	Publication	Journal of Glaciology	Abbreviated Journal
	Volume	61	Issue	225	Pages	17-28
	Keywords	Antarctic glaciology aerogeophysical measurements glacier mapping glaciological instruments and methods ice-sheet mass balance
	Abstract	Satellite altimetric time series allow high-precision monitoring of ice-sheet mass balance. Understanding elevation changes in these regions is important because outlet glaciers along ice-sheet margins are critical in controlling flow of inland ice. Here we discuss a new airborne altimetry dataset collected as part of the ICECAP (International Collaborative Exploration of the Cryosphere by Airborne Profiling) project over East Antarctica. Using the ALAMO (Airborne Laser Altimeter with Mapping Optics) system of a scanning photon-counting lidar combined with a laser altimeter, we extend the 2003–09 surface elevation record of NASA’s ICESat satellite, by determining cross-track slope and thus independently correcting for ICESat’s cross-track pointing errors. In areas of high slope, cross-track errors result in measured elevation change that combines surface slope and the actual Δz/Δt signal. Slope corrections are particularly important in coastal ice streams, which often exhibit both rapidly changing elevations and high surface slopes. As a test case (assuming that surface slopes do not change significantly) we observe a lack of ice dynamic change at Cook Ice Shelf, while significant thinning occurred at Totten and Denman Glaciers during 2003–09.
	Programme	1053
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	Publisher		Place of Publication		Editor
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	Series Volume		Series Issue		Edition
	ISSN	0022-1430, 1727-5652	ISBN	0022-1430, 1727-5652	Medium
	Area		Expedition		Conference
	Notes				Approved	yes
	Call Number				Serial	6794
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