12- to 100-MHz depth and stratigraphic profiles of temperate glaciers

Steven A. Arcone; Daniel E. Lawson; Allan J. Delaney; Mark L. Moran

doi:10.1117/12.383596

27 April 2000 12- to 100-MHz depth and stratigraphic profiles of temperate glaciers

Steven A. Arcone, Daniel E. Lawson, Allan J. Delaney, Mark L. Moran

Proceedings Volume 4084, Eighth International Conference on Ground Penetrating Radar; (2000) https://doi.org/10.1117/12.383596
Event: 8th International Conference on Ground Penetrating Radar, 2000, Gold Coast, Australia

Abstract

Current practice prescribes the long standing use of frequencies less than 10 MHz for GPR sounding of temperate glaciers to depths greater than about 100 m. We have obtained continuous profiles of ice depth over temperate ablation zones and have reached at least 278 m at 30 MHz on the Matanuska, 195 m at 100-MHz on the Muir and 295 m at 12 MHz on the Gulkana Glaciers of Alaska. Internal stratigraphy occurs in the Matanuska profile. Multiple bottom returns are ascribed to thrust planes and out-of-plane reflections from sloping bottoms. Inability to reach greater depths is ascribed to unfavorable bottom slopes, as verified by drilling on the Matanuska, and by beam steering studies on the Gulkana. Lateral wave clutter contaminates profiles at all frequencies and polarizations where crevasses are present. The strength of 12-MHz Gulkana bottom signals precluded the use of range gain and suggests that 500 m depth might be achieved at 12 - 30 MHz.

Citation Download Citation

Steven A. Arcone, Daniel E. Lawson, Allan J. Delaney, and Mark L. Moran "12- to 100-MHz depth and stratigraphic profiles of temperate glaciers", Proc. SPIE 4084, Eighth International Conference on Ground Penetrating Radar, (27 April 2000); https://doi.org/10.1117/12.383596

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available