Remotely sensing the morphometrics and dynamics of a cold region dune field using historical aerial photography and airborne LiDAR data

Remote Sensing
By: , and 

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Abstract

This study uses an airborne Light Detection and Ranging (LiDAR) survey, historical aerial photography and historical climate data to describe the character and dynamics of the Nogahabara Sand Dunes, a sub-Arctic dune field in interior Alaska’s discontinuous permafrost zone. The Nogahabara Sand Dunes consist of a 43-km2 area of active transverse and barchanoid dunes within a 3200-km2 area of vegetated dune and sand sheet deposits. The average dune height in the active portion of the dune field is 5.8 m, with a maximum dune height of 28 m. Dune spacing is variable with average crest-to-crest distances for select transects ranging from 66–132 m. Between 1952 and 2015, dunes migrated at an average rate of 0.52 m a−1. Dune movement was greatest between 1952 and 1978 (0.68 m a−1) and least between 1978 and 2015 (0.43 m a−1). Dunes migrated predominantly to the southeast; however, along the dune field margin, net migration was towards the edge of the dune field regardless of heading. Better constraining the processes controlling dune field dynamics at the Nogahabara dunes would provide information that can be used to model possible reactivation of more northerly dune fields and sand sheets in response to climate change, shifting fire regimes and permafrost thaw.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Remotely sensing the morphometrics and dynamics of a cold region dune field using historical aerial photography and airborne LiDAR data
Series title Remote Sensing
DOI 10.3390/rs10050792
Volume 10
Issue 5
Year Published 2018
Language English
Publisher Multidisciplinary Digital Publishing Institute
Contributing office(s) Alaska Science Center Geography, Woods Hole Coastal and Marine Science Center
Description Article 792; 19 p.
First page 1
Last page 19