Filters: Tags: DIGITAL ELEVATION/DIGITAL TERRAIN MODELS (X) > Types: OGC WFS Layer (X)
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The purpose of this project is to provide better information to industry and regulatory agencies regarding the likely locations of polar bear dens. This project integrates snow physics, high-resolution digital elevation data, and bear biology to produce more refined and accurate maps predicting suitable polar bear den habitat than are currently available. The work consists of data gathering, consultation between snow and bear scientists, modeling, and sensitivity studies to understand the various factors influencing den location and evolution along the Beaufort Coast.The proposed work is intended to refine current methods of identifying polar bear denning sites by incorporating higher-resolution topographic data...
Polar bears along Alaska’s Beaufort Sea frequently give birth to young in land-based snow dens.These dens are established in November, typically in deep snowdrifts that have developed in thelee of cut-banks found along streams, rivers, and the coast. Durner et al. (2001, 2006) indicatedthat, for 24 known land den sites, the local slopes ranged from 15 to 50° and were 1.3 to 34 mhigh. The dens faced all directions but east. They published a distribution map based on habitatcharacteristics, presumably reflecting snow drifting, largely bracketing the generally northwardflowing drainages of the region. No attempt was made in the cited studies to model snow driftingexplicitly, though it was recognized that this was an...
The USGS St. Petersburg Coastal and Marine Science Center (USGS St. Pete) processed lidar topographic data in Alaska. Raw lidar data are not in a format that is generally usable by resource managers and scientists for scientific analysis. Converting dense lidar elevation data into a readily usable format without loss of essential information requires specialized processing. Project included processing of lidar data acquired in Summer 2010 along the North Slope of Alaska between Colville River and Hulahula River.
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