Modeled Bathymetry Maps of 17 Lakes on the Arctic Coastal Plain of Alaska, 2017
The goal of this project was to test the application of spectral depth models to quantify lake water volumes on the Inner Arctic Coastal Plain of Alaska. Lakes in this area tend to be deeper than those nearby and store a significant amount of the region’s water, making them important in terms of ene...
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2019
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dataone:doi:10.18739/A2HT2GC6G 2024-06-03T18:46:31+00:00 Modeled Bathymetry Maps of 17 Lakes on the Arctic Coastal Plain of Alaska, 2017 Claire Simpson Inner Arctic Coastal Plain, Alaska ENVELOPE(-154.48,-153.06,70.36,69.99) BEGINDATE: 2017-07-22T00:00:00Z ENDDATE: 2017-07-27T00:00:00Z 2019-01-01T00:00:00Z https://doi.org/10.18739/A2HT2GC6G unknown Arctic Data Center Bathymetry Lake Depth North Slope Dataset 2019 dataone:urn:node:ARCTIC https://doi.org/10.18739/A2HT2GC6G 2024-06-03T18:17:00Z The goal of this project was to test the application of spectral depth models to quantify lake water volumes on the Inner Arctic Coastal Plain of Alaska. Lakes in this area tend to be deeper than those nearby and store a significant amount of the region’s water, making them important in terms of energy balance, as ecological habitat, and as water sources for infrastructure (e.g. ice roads). Due in part to their depth, these lakes have often been neglected by the limited number of prior studies that also focus on lakes in northern Alaska. Techniques employed by these studies limit the magnitude, precision, and/or scale at which depths can be assessed. By analyzing remotely sensed lake color using a method typically reserved for coastal bathymetry mapping, we are able to predict deeper depths and thus more accurately evaluate deep Arctic lake water volumes. This dataset includes 30 meter resolution bathymetry rasters for 17 lakes on the Alaskan Arctic Coastal Plain. These depth maps were created using linear and exponential models tuned with sonar depth measurements (depth dataset: doi:10.18739/A2SN01440) and applied to a Landsat-8 image (image ID: LC08_L1TP_077011_20160805_20170222_01_TI). The 12 model variants we tested were each distinguished by the two Red-Green-Blue (RGB) bands used, linear or exponential growth pattern, and simple or transform ratio. We were able to successfully tune models at the scale of an individual lake, predicting depth with an average model uncertainty (based on root mean squared error) of 1.44 meters. Volumes derived from the provided bathymetry rasters may be useful for understanding the distribution of water across northern Alaska and providing context for future changes in the landscape. Models were derived in part from: Stumpf, R. P., Holderied, K., and Sinclair, M. (2003). Determination of water depth with high-resolution satellite imagery over variable bottom types. Limnology and Oceanography, 48(1), 547-606. Sonar depth points provided by: Simpson, C. and Arp, C. (2018). Sonar Depth Measurements at Lakes on the Inner Arctic Coastal Plain of Alaska, July 2017. Arctic Data Center. doi:10.18739/A2SN01440 [https://doi.org/10.18739/A2SN01440] Dataset Arctic north slope Alaska Arctic Data Center (via DataONE) Arctic Arctic Lake ENVELOPE(-130.826,-130.826,57.231,57.231) Sinclair ENVELOPE(-63.883,-63.883,-65.733,-65.733) ENVELOPE(-154.48,-153.06,70.36,69.99) |
institution |
Open Polar |
collection |
Arctic Data Center (via DataONE) |
op_collection_id |
dataone:urn:node:ARCTIC |
language |
unknown |
topic |
Bathymetry Lake Depth North Slope |
spellingShingle |
Bathymetry Lake Depth North Slope Claire Simpson Modeled Bathymetry Maps of 17 Lakes on the Arctic Coastal Plain of Alaska, 2017 |
topic_facet |
Bathymetry Lake Depth North Slope |
description |
The goal of this project was to test the application of spectral depth models to quantify lake water volumes on the Inner Arctic Coastal Plain of Alaska. Lakes in this area tend to be deeper than those nearby and store a significant amount of the region’s water, making them important in terms of energy balance, as ecological habitat, and as water sources for infrastructure (e.g. ice roads). Due in part to their depth, these lakes have often been neglected by the limited number of prior studies that also focus on lakes in northern Alaska. Techniques employed by these studies limit the magnitude, precision, and/or scale at which depths can be assessed. By analyzing remotely sensed lake color using a method typically reserved for coastal bathymetry mapping, we are able to predict deeper depths and thus more accurately evaluate deep Arctic lake water volumes. This dataset includes 30 meter resolution bathymetry rasters for 17 lakes on the Alaskan Arctic Coastal Plain. These depth maps were created using linear and exponential models tuned with sonar depth measurements (depth dataset: doi:10.18739/A2SN01440) and applied to a Landsat-8 image (image ID: LC08_L1TP_077011_20160805_20170222_01_TI). The 12 model variants we tested were each distinguished by the two Red-Green-Blue (RGB) bands used, linear or exponential growth pattern, and simple or transform ratio. We were able to successfully tune models at the scale of an individual lake, predicting depth with an average model uncertainty (based on root mean squared error) of 1.44 meters. Volumes derived from the provided bathymetry rasters may be useful for understanding the distribution of water across northern Alaska and providing context for future changes in the landscape. Models were derived in part from: Stumpf, R. P., Holderied, K., and Sinclair, M. (2003). Determination of water depth with high-resolution satellite imagery over variable bottom types. Limnology and Oceanography, 48(1), 547-606. Sonar depth points provided by: Simpson, C. and Arp, C. (2018). Sonar Depth Measurements at Lakes on the Inner Arctic Coastal Plain of Alaska, July 2017. Arctic Data Center. doi:10.18739/A2SN01440 [https://doi.org/10.18739/A2SN01440] |
format |
Dataset |
author |
Claire Simpson |
author_facet |
Claire Simpson |
author_sort |
Claire Simpson |
title |
Modeled Bathymetry Maps of 17 Lakes on the Arctic Coastal Plain of Alaska, 2017 |
title_short |
Modeled Bathymetry Maps of 17 Lakes on the Arctic Coastal Plain of Alaska, 2017 |
title_full |
Modeled Bathymetry Maps of 17 Lakes on the Arctic Coastal Plain of Alaska, 2017 |
title_fullStr |
Modeled Bathymetry Maps of 17 Lakes on the Arctic Coastal Plain of Alaska, 2017 |
title_full_unstemmed |
Modeled Bathymetry Maps of 17 Lakes on the Arctic Coastal Plain of Alaska, 2017 |
title_sort |
modeled bathymetry maps of 17 lakes on the arctic coastal plain of alaska, 2017 |
publisher |
Arctic Data Center |
publishDate |
2019 |
url |
https://doi.org/10.18739/A2HT2GC6G |
op_coverage |
Inner Arctic Coastal Plain, Alaska ENVELOPE(-154.48,-153.06,70.36,69.99) BEGINDATE: 2017-07-22T00:00:00Z ENDDATE: 2017-07-27T00:00:00Z |
long_lat |
ENVELOPE(-130.826,-130.826,57.231,57.231) ENVELOPE(-63.883,-63.883,-65.733,-65.733) ENVELOPE(-154.48,-153.06,70.36,69.99) |
geographic |
Arctic Arctic Lake Sinclair |
geographic_facet |
Arctic Arctic Lake Sinclair |
genre |
Arctic north slope Alaska |
genre_facet |
Arctic north slope Alaska |
op_doi |
https://doi.org/10.18739/A2HT2GC6G |
_version_ |
1800867067916713984 |