Surface Water Area from sub-meter resolution Satellite Imagery, 2002-2019, Kotzebue, Northwestern Baldwin Peninsula Alaska (US)

Jones, Benjamin M.; Tape, Kenneth; Clark, Jason; Nitze, Ingmar; Grosse, Guido; Disbrow, Jeff

Arctic landscapes are in a state of transition due to changes in climate occurring during both the summer and winter seasons. Scattered observations indicate that beavers (Castor canadensis) have moved from the forest into tundra areas during the last 20 years, likely in response to broader physical and ecosystem changes occurring in Arctic and Boreal regions. The implications of beaver inhabitation in the Arctic and Boreal are unique relative to other ecosystems due to the presence of permafrost and its vulnerability associated with beaver dams and inundation. Our study specifically examines the role of beavers in controlling surface water dynamics and related thermokarst development in low Arctic tundra regions. We mapped the number of beaver dams visible in sub-meter resolution satellite images acquired between 2002 and 2019 for a 100 square kilometer study area (12 years of imagery) near Kotzebue, Alaska and a 430 square kilometer study area (3 years of imagery) encompassing the entire northern Baldwin Peninsula, Alaska. We show that during the last two decades beaver-driven ecosystem engineering is responsible for the majority of surface water area changes and inferred thermokarst development in the study area. This has implications for interpreting surface water area changes and thermokarst dynamics in other Arctic and Boreal regions that may also result from beaver dam building activities.

This geospatial dataset provides polygon vector files representing surface water area in a 100 square kilometer study area located near Kotzebue, Alaska. Surface water area maps were created using sub-meter resolution satellite imagery for the years 2002, 2007-2014, and 2017-2019. Image selection focused on cloud-free, ice-free, and calm surface water conditions with images being acquired between late-June and mid-August in a given year. All images were resampled to a spatial resolution of 70 centimeter to match the lowest resolution image in the time series prior to analysis. Within year image dates range from 25 June to 22 August with the average date of image acquisition being 17 July (table 1). Object-based image analysis was conducted in eCognition Essentials 1.3.

Detailed information about the methods can be found in the data publication and the publication to which this dataset is a supplement.

Citation

In order to use these data, you must cite this data set with the following citation:

Benjamin Jones, Kenneth Tape, Jason Clark, Ingmar Nitze, Guido Grosse, et al. Northwestern Arctic Alaska surface water area vector files, Kotzebue study area, 2002-2019. Arctic Data Center. doi:10.18739/A22V2C974.

Contact

Jones, Benjamin M.

Metadata Access

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Data and Resources

Additional Info

Field Value
Identifier DOI:10.18739/A22V2C974
Project(s) Emergence of beavers as ecosystem engineers in the New Arctic
Institute University of Alaska Fairbanks, Fairbanks, AK, USA
Source https://doi.org/10.18739/A22V2C974
Publication Date 2020
Version 1.0
Product group
Product Surface Water Area Map
Sensor sub-meter resolution Satellite Images
Files
  • polygon feature layer of surface water area
Variables [Units]
  • OBJECTID: Object identification
  • Shape_Length: Length of the lake perimeter [m]
  • Shape_Area: Area of the lake [m²]
Region NW Arctic Alaska
Spatial Reference EPSG:32603 WGS 84 / UTM zone 3N
Spatial Resolution 0.7 m
Spatial Coverage Latitude 66.81 to 66.94, Longitude -162.66 to -162.38
Temporal Coverage 2002 to 2019
Temporal Resolution 25 June to 22 August
Format ESRI FileGDB
Is Supplement to Benjamin M. Jones et al. Increase in beaver dams controls surface water and thermokarstdynamics in an Arctic tundra region, Baldwin Peninsula, northwestern Alaska, 2020 Environ. Res. Lett. in press https://doi.org/10.1088/1748-9326/ab80f1
Related to Benjamin Jones, Kenneth Tape, Jason Clark, Ingmar Nitze, Guido Grosse, et al. Northwestern Arctic Alaska beaver dam locations, northern Baldwin Peninsula region, 2010-2019. Arctic Data Center. doi:10.18739/A2CZ3253W. Benjamin Jones, Ken Tape, Jason Clark, Ingmar Nitze, Guido Grosse, et al. Northwestern Arctic Alaska beaver dam locations, Kotzebue, Alaska, 2002-2019. Arctic Data Center. doi:10.18739/A2TB0XV89.

Dataset extent

Map data © OpenStreetMap contributors