Date of Award

2016

Document Type

Thesis

Degree Name

M.S.

Keywords

Deforestation, Remote sensing, Climate modeling, Spectral mixture analysis, Surface air temperature, Stand density, Topographic shade, GIS, Washington

Department

Geography

First Advisor

Michael A. O'Neal

Second Advisor

Steven Hick

Abstract

Changes in areal extent of land cover types may lead to alterations in the surface energy budget that contribute to anthropogenic climate forcing. This study examines the effects of deforestation in the Cascade Range on local temperature. Temperature sensors were installed in 14 forest stands, taking measurements for one year. Estimated tree age, circumference, and species were recorded to calculate stand density index. Satellite imagery was used to calculate shade fraction from spectral mixture analysis, which is a proxy for canopy structure and density. These data were used to construct seasonal cycles of temperature to model variation with stand density and elevation. Maximum daily temperatures were 3.6°C higher in clearcut than mature forests in summer and 2.6°C higher in winter.

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Copyright Statement / License for Reuse

Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.

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