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Snow thickness profiling on Antarctic sea-ice with GPR - rapid and accurate measurements with the potential to upscale needles to a haystack
Citation
Pfaffhuber, AA and Lieser, JL and Haas, C, Snow thickness profiling on Antarctic sea-ice with GPR - rapid and accurate measurements with the potential to upscale needles to a haystack, Geophysical Research Letters, 44, (15) pp. 7836-7844. ISSN 0094-8276 (2017) [Refereed Article]
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Copyright Statement
Copyright 2017 The Authors. Licensed under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) https://creativecommons.org/licenses/by-nc-nd/4.0/
Abstract
Snow thickness on sea ice is a largely under-sampled parameter, yet of importance for the sea-ice mass balance and for satellite based sea-ice thickness estimates and thus our general understanding of global ice-volume change. Traditional direct thickness measurements with meter sticks can provide accurate but only spot information, referred to as "needles" due to their pinpoint focus and information while airborne and satellite remote sensing snow products, referred to as "the haystack" have large uncertainties due to their scale. We demonstrate the remarkable accuracy and applicability of ground penetrating radar (GPR) snow-thickness measurements by comparing them with in-situ, meter-stick data from two field campaigns to Antarctica in late winter/early spring. The efficiency and millimeter- to centimeter accuracy of GPR enables practitioners to acquire extensive, semi-regional data with the potential to upscale "needles" to "the haystack" and to potentially calibrate satellite remote sensing products that we confirm to derive roughly 30 % of the in-situ thickness. We find the radar wave propagation velocity in snow to be rather constant (+/- 6%), encouraging regional snow-thickness surveys. Snow thinner than 10 cm is under the detection limit with the off-the-shelf GPR setup utilized in our study.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | Antarctica, snow on sea ice, GPR |
| Research Division: | Earth Sciences |
| Research Group: | Physical geography and environmental geoscience |
| Research Field: | Physical geography and environmental geoscience not elsewhere classified |
| Objective Division: | Environmental Policy, Climate Change and Natural Hazards |
| Objective Group: | Understanding climate change |
| Objective Field: | Effects of climate change on Antarctic and sub-Antarctic environments (excl. social impacts) |
| UTAS Author: | Lieser, JL (Dr Jan Lieser) |
| ID Code: | 118752 |
| Year Published: | 2017 |
| Web of Science® Times Cited: | 4 |
| Deposited By: | CRC-Antarctic Climate & Ecosystems |
| Deposited On: | 2017-07-19 |
| Last Modified: | 2022-08-24 |
| Downloads: | 155 View Download Statistics |
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