Impact of spatial aliasing on sea-ice thickness measurements
| Author(s) | Geiger, Cathleen A. | |
| Author(s) | Müller, Hans-Reinhard | |
| Author(s) | Samluk, Jesse P. | |
| Author(s) | Bernstein, E. Rachel | |
| Author(s) | Richter-Menge, Jacqueline A. | |
| Ordered Author | Cathleen GEIGER, Hans-Reinhard MÜLLER, Jesse P. SAMLUK, E. Rachel BERNSTEIN, Jacqueline RICHTER-MENGE | |
| UD Author | Geiger, Cathleen A. | en_US |
| UD Author | Samluk, Jesse P. | en_US |
| UD Author | Bernstein, E. Rachel | en_US |
| Date Accessioned | 2015-12-23T16:23:27Z | |
| Date Available | 2015-12-23T16:23:27Z | |
| Copyright Date | Copyright © | en_US |
| Publication Date | 2015-10-01 | |
| Description | Publisher's PDF | en_US |
| Abstract | We explore spatial aliasing of non-Gaussian distributions of sea-ice thickness. Using a heuristic model and >1000 measurements, we show how different instrument footprint sizes and shapes can cluster thickness distributions into artificial modes, thereby distorting frequency distribution, making it difficult to compare and communicate information across spatial scales. This problem has not been dealt with systematically in sea ice until now, largely because it appears to incur no significant change in integrated thickness which often serves as a volume proxy. Concomitantly, demands are increasing for thickness distribution as a resource for modeling, monitoring and forecasting air–sea fluxes and growing human infrastructure needs in a changing polar environment. New demands include the characterization of uncertainties both regionally and seasonally for spaceborne, airborne, in situ and underwater measurements. To serve these growing needs, we quantify the impact of spatial aliasing by computing resolution error (Er) over a range of horizontal scales (x) from 5 to 500 m. Results are summarized through a power law (Er = bxm) with distinct exponents (m) from 0.3 to 0.5 using example mathematical functions including Gaussian, inverse linear and running mean filters. Recommendations and visualizations are provided to encourage discussion, new data acquisitions, analysis methods and metadata formats. | en_US |
| Department | University of Delaware. Department of Geography. | en_US |
| Department | University of Delaware. Department of Electrical and Computer Engineering. | en_US |
| Citation | Geiger, C. A., et al. "Impact of spatial aliasing on sea-ice thickness measurements." Annals of Glaciology 56.69 (2015): 353. | en_US |
| DOI | 10.3189/2015AoG69A644 | en_US |
| ISSN | 0260-3055 ; e- 1727-5644 | en_US |
| URL | http://udspace.udel.edu/handle/19716/17347 | |
| Language | en_US | en_US |
| Publisher | International Glaciological Society | en_US |
| dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | en_US |
| dc.source | Annals of Glaciology | en_US |
| dc.source.uri | http://www.igsoc.org/annals/ | en_US |
| Title | Impact of spatial aliasing on sea-ice thickness measurements | en_US |
| Type | Article | en_US |
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