The vast majority of theses in this collection are open access and freely available. There are a small number of theses that have access restricted to the WWU campus. For off-campus access to a thesis labeled "Campus Only Access," please log in here with your WWU universal ID, or talk to your librarian about requesting the restricted thesis through interlibrary loan.
Date Permissions Signed
Date of Award
Department or Program Affiliation
Master of Science (MS)
Khan, Alia L.
Strecker, Angela Lee
Black carbon (BC) is partially combusted organic material from natural and anthropogenic sources, and is a highly effective driver of melt in the cryosphere. BC has been found in both populated and remote areas around the globe. This study follows the evolution of UV-exposed dissolved BC (DBC) in the cryosphere using the Benzenepolycarboxylic Acid (BPCA) markers B4CA, B5CA, and B6CA. Samples were collected from Mount Baker, Washington, and from both an in situ field study and a controlled photodegradation study, both using natural and anthropogenic BC standards. Both natural and experimental samples had a dominance of B5CA relative to other BPCAs. Many natural samples did not have identifiable quantities of B4CA. Natural snow samples and control samples show overall low DBC values, within range of other cryospheric studies around the world and in the Pacific Northwest United States. The controlled photodegradation study showed an increase in DBC with UV exposure for all standards compared to controls, however diesel soot samples showed
black carbon, BC, glacier, snow, biogeochemistry, BPCA, benzenepolycarboxylic acid, DBC, Mount Baker, cryosphere
Western Washington University
Subject – LCSH
Soot--Washington (State)--Mount Baker National Forest; Water--Organic compound content--Washington (State)--Mount Baker National Forest; Cryosphere; Photodegradation--Washington (State)--Mount Baker National Forest; Ultraviolet radiation--Washington (State)--Mount Baker National Forest
Mount Baker National Forest (Wash.)
Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this document for commercial purposes, or for financial gain, shall not be allowed without the author’s written permission.
Peek, Molly, "The photochemical evolution of dissolved black carbon in snow: a case study from the North Cascades" (2022). WWU Graduate School Collection. 1149.