Mapping snow depth within a tundra ecosystem using multiscale observations and Bayesian methods
This paper compares and integrates different strategies to characterize the variability of end-of-winter snow depth and its relationship to topography in ice-wedge polygon tundra of Arctic Alaska. Snow depth was measured using in situ snow depth probes and estimated using groundpenetrating radar (GP...
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ftcdlib:oai:escholarship.org/ark:/13030/qt7mj9q82f 2023-05-15T15:10:38+02:00 Mapping snow depth within a tundra ecosystem using multiscale observations and Bayesian methods Wainwright, HM Liljedahl, AK Dafflon, B Ulrich, C Peterson, JE Gusmeroli, A Hubbard, SS 857 - 875 2017-04-03 application/pdf https://escholarship.org/uc/item/7mj9q82f unknown eScholarship, University of California qt7mj9q82f https://escholarship.org/uc/item/7mj9q82f public Cryosphere, vol 11, iss 2 Meteorology & Atmospheric Sciences Oceanography Physical Geography and Environmental Geoscience article 2017 ftcdlib 2020-03-20T23:54:55Z This paper compares and integrates different strategies to characterize the variability of end-of-winter snow depth and its relationship to topography in ice-wedge polygon tundra of Arctic Alaska. Snow depth was measured using in situ snow depth probes and estimated using groundpenetrating radar (GPR) surveys and the photogrammetric detection and ranging (phodar) technique with an unmanned aerial system (UAS).We found that GPR data provided highprecision estimates of snow depth (RMSE D2.9 cm), with a spatial sampling of 10 cm along transects. Phodar-based approaches provided snow depth estimates in a less laborious manner compared to GPR and probing, while yielding a high precision (RMSED6.0 cm) and a fine spatial sampling (4cm-4cm). We then investigated the spatial variability of snow depth and its correlation to micro-and macrotopography using the snow-free lidar digital elevation map (DEM) and the wavelet approach. We found that the end-of-winter snow depth was highly variable over short (several meter) distances, and the variability was correlated with microtopography. Microtopographic lows (i.e., troughs and centers of low-centered polygons) were filled in with snow, which resulted in a smooth and even snow surface following macrotopography. We developed and implemented a Bayesian approach to integrate the snow-free lidar DEM and multiscale measurements (probe and GPR) as well as the topographic correlation for estimating snow depth over the landscape. Our approach led to high-precision estimates of snow depth (RMSED6.0 cm), at 0.5m resolution and over the lidar domain (750m × 700m). Article in Journal/Newspaper Arctic Tundra Alaska University of California: eScholarship Arctic |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Meteorology & Atmospheric Sciences Oceanography Physical Geography and Environmental Geoscience |
spellingShingle |
Meteorology & Atmospheric Sciences Oceanography Physical Geography and Environmental Geoscience Wainwright, HM Liljedahl, AK Dafflon, B Ulrich, C Peterson, JE Gusmeroli, A Hubbard, SS Mapping snow depth within a tundra ecosystem using multiscale observations and Bayesian methods |
topic_facet |
Meteorology & Atmospheric Sciences Oceanography Physical Geography and Environmental Geoscience |
description |
This paper compares and integrates different strategies to characterize the variability of end-of-winter snow depth and its relationship to topography in ice-wedge polygon tundra of Arctic Alaska. Snow depth was measured using in situ snow depth probes and estimated using groundpenetrating radar (GPR) surveys and the photogrammetric detection and ranging (phodar) technique with an unmanned aerial system (UAS).We found that GPR data provided highprecision estimates of snow depth (RMSE D2.9 cm), with a spatial sampling of 10 cm along transects. Phodar-based approaches provided snow depth estimates in a less laborious manner compared to GPR and probing, while yielding a high precision (RMSED6.0 cm) and a fine spatial sampling (4cm-4cm). We then investigated the spatial variability of snow depth and its correlation to micro-and macrotopography using the snow-free lidar digital elevation map (DEM) and the wavelet approach. We found that the end-of-winter snow depth was highly variable over short (several meter) distances, and the variability was correlated with microtopography. Microtopographic lows (i.e., troughs and centers of low-centered polygons) were filled in with snow, which resulted in a smooth and even snow surface following macrotopography. We developed and implemented a Bayesian approach to integrate the snow-free lidar DEM and multiscale measurements (probe and GPR) as well as the topographic correlation for estimating snow depth over the landscape. Our approach led to high-precision estimates of snow depth (RMSED6.0 cm), at 0.5m resolution and over the lidar domain (750m × 700m). |
format |
Article in Journal/Newspaper |
author |
Wainwright, HM Liljedahl, AK Dafflon, B Ulrich, C Peterson, JE Gusmeroli, A Hubbard, SS |
author_facet |
Wainwright, HM Liljedahl, AK Dafflon, B Ulrich, C Peterson, JE Gusmeroli, A Hubbard, SS |
author_sort |
Wainwright, HM |
title |
Mapping snow depth within a tundra ecosystem using multiscale observations and Bayesian methods |
title_short |
Mapping snow depth within a tundra ecosystem using multiscale observations and Bayesian methods |
title_full |
Mapping snow depth within a tundra ecosystem using multiscale observations and Bayesian methods |
title_fullStr |
Mapping snow depth within a tundra ecosystem using multiscale observations and Bayesian methods |
title_full_unstemmed |
Mapping snow depth within a tundra ecosystem using multiscale observations and Bayesian methods |
title_sort |
mapping snow depth within a tundra ecosystem using multiscale observations and bayesian methods |
publisher |
eScholarship, University of California |
publishDate |
2017 |
url |
https://escholarship.org/uc/item/7mj9q82f |
op_coverage |
857 - 875 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tundra Alaska |
genre_facet |
Arctic Tundra Alaska |
op_source |
Cryosphere, vol 11, iss 2 |
op_relation |
qt7mj9q82f https://escholarship.org/uc/item/7mj9q82f |
op_rights |
public |
_version_ |
1766341629444096000 |