Event Title

Examining the optical properties of colored dissolved organic matter (CDOM) in Puget Sound at Taylor dock using 3D excitation emission matrix spectroscopy

Research Mentor(s)

Clark, Catherine

Description

Colored dissolved organic matter (CDOM) is an active part of marine ecosystems which plays a key role in the carbon cycle. This study is going to evaluate the seasonal changes in CDOM over the course of a year in Taylor dock. CDOM is measured using 3D excitation emission matrix (EEM) spectroscopy which are visualized as contour plots. Three peaks have been identified which include humic-like (A & C), and protein-like (T) fluorescence. To further investigate the sources of the T peaks at Taylor Dock a six hour irradiation experiment was conducted using senescent seagrass, Zostera marina to see if the protein-like peaks were excreted from the seagrass during photodegradation or from anthropogenic sources such as oil based products. So far there have been no significant changes in the optical properties of CDOM for fall and winter but have potentially produced T peaks from irradiation. Before any conclusions can be made for this study we must account for spring and summer variation and further investigate the fluorescence of oil peaks in our samples.

Document Type

Event

Start Date

15-5-2019 9:00 AM

End Date

15-5-2019 5:00 PM

Location

Carver Gym (Bellingham, Wash.)

Department

Chemistry

Genre/Form

student projects, posters

Subjects – Topical (LCSH)

Water--Washington (State)--Bellingham Bay--Optical properties; Water--Organic compound content-Washington (State)--Bellingham Bay

Geographic Coverage

Bellingham Bay (Wash.)

Type

Image

Rights

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.

Language

English

Format

application/pdf

This document is currently not available here.

Share

COinS
 
May 15th, 9:00 AM May 15th, 5:00 PM

Examining the optical properties of colored dissolved organic matter (CDOM) in Puget Sound at Taylor dock using 3D excitation emission matrix spectroscopy

Carver Gym (Bellingham, Wash.)

Colored dissolved organic matter (CDOM) is an active part of marine ecosystems which plays a key role in the carbon cycle. This study is going to evaluate the seasonal changes in CDOM over the course of a year in Taylor dock. CDOM is measured using 3D excitation emission matrix (EEM) spectroscopy which are visualized as contour plots. Three peaks have been identified which include humic-like (A & C), and protein-like (T) fluorescence. To further investigate the sources of the T peaks at Taylor Dock a six hour irradiation experiment was conducted using senescent seagrass, Zostera marina to see if the protein-like peaks were excreted from the seagrass during photodegradation or from anthropogenic sources such as oil based products. So far there have been no significant changes in the optical properties of CDOM for fall and winter but have potentially produced T peaks from irradiation. Before any conclusions can be made for this study we must account for spring and summer variation and further investigate the fluorescence of oil peaks in our samples.