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Date Permissions Signed

5-12-2016

Date of Award

Spring 2016

Document Type

Masters Thesis

Degree Name

Master of Science (MS)

Department

Environmental Studies

First Advisor

Medler, Michael J.

Second Advisor

Matthews, Robin A.

Third Advisor

Flower, Aquila

Fourth Advisor

Hall, Dorothy

Abstract

Wildfire is a growing problem in the US mountain west, with suppression costs exceeding $2 billion in 2015. Wildfire outbreaks occur in climate-driven synchronous events, and by studying the climate patterns that lead to dangerous fire conditions scientists have been able to identify numerous climatic factors that contribute to large fires. Low snow years and early snowmelt have long been hypothesized as indicators of large fire years, though there are few papers that identify this link explicitly, and those that do show great variation between the different mountainous areas of the west. In this thesis I, along with my co-investigators, explore the relationship between snowmelt timing and wildfire area burned among the many ecological systems of the US mountain west. We begin by defining a new way to identify snowmelt timing using time-series satellite imagery. We then form a theoretical and statistical framework for comparing snowmelt timing with area burned, modeled from previous climate/fire investigations. We further refined the snowmelt timing data using the complete MODIS record for the northern hemisphere. Finally, we use the MODIS-derived snowmelt timing data to investigate snowmelt/fire relationships at a moderate scale across hundreds of ecological systems of the US mountain west. Once we identified specific ecological systems that exhibit a link between snowmelt timing and wildfire we discussed the ecological implications of this relationship as well as fire-management strategies for land managers and public officials. This body of work demonstrates a substantial contribution to the fields of cryosphere studies, remote sensing, and fire ecology.

Type

Text

Publisher

Western Washington University

OCLC Number

950400292

Digital Format

application/pdf

Geographic Coverage

West (U.S.)

Genre/Form

Academic theses

Language

English

Language Code

eng

Rights

Copying of this thesis in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this thesis for commercial purposes, or for financial gain, shall not be allowed without the author's written permission.

Available for download on Friday, May 19, 2017

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