DEM, tide and velocity over sulzberger ice shelf, West Antarctica

Baek, S.; Shum, C. K.; Lee, H.; Yi, Y.; Kwoun, O. -I.; Lu, Z.; Braun, A.

Abstract:

Arctic and Antarctic ice sheets preserve more than 77% of the global fresh water and could raise global sea level by several meters if completely melted. Ocean tides near and under ice shelves shifts the grounding line position significantly and are one of current limitations to study glacier dynamics and mass balance. The Sulzberger ice shelf is an area of ice mass flux change in West Antarctica and has not yet been well studied. In this study, we use repeat-pass synthetic aperture radar (SAR) interferometry data from the ERS-1 and ERS-2 tandem missions for generation of a high-resolution (60-m) Digital Elevation Model (DEM) including tidal deformation detection and ice stream velocity of the Sulzberger Ice Shelf. Other satellite data such as laser altimeter measurements with fine foot-prints (70-m) from NASA‘s ICESat are used for validation and analyses. The resulting DEM has an accuracy of-0.57??5.88 m and is demonstrated to be useful for grounding line detection and ice mass balance studies. The deformation observed by InSAR is found to be primarily due to ocean tides and atmospheric pressure. The 2-D ice stream velocities computed agree qualitatively with previous methods on part of the Ice Shelf from passive microwave remote-sensing data (i.e., LANDSAT). ?? 2005 IEEE.

Genre:

Conference Paper

ProdID:

70027302

Citation Author:

Baek, S.; Shum, C. K.; Lee, H.; Yi, Y.; Kwoun, O. -I.; Lu, Z.; Braun, A.

Citation Contributing Office:

Citation Datum:

Citation Day:

Citation Edition:

Citation Editor:

Citation End Page:

2728

Citation Issue:

Citation Keywords:

Citation Language:

English

Citation Larger Work Title:

International Geoscience and Remote Sensing Symposium (IGARSS)

Citation LatN:

Citation LatS:

Citation LonE:

Citation LonW:

Citation Month:

Citation No Pagination:

Citation Number Of Pages:

Citation Online Only Flag:

Citation Phsyical Description:

Citation Projection:

Citation Public Comments:

Citation Publisher:

Citation Series:

Citation Series Code:

Citation Series Number:

Citation Search Results Text:

DEM, tide and velocity over sulzberger ice shelf, West Antarctica; 2005; Conference Paper; International Geoscience and Remote Sensing Symposium (IGARSS); Baek, S.; Shum, C. K.; Lee, H.; Yi, Y.; Kwoun, O. -I.; Lu, Z.; Braun, A.