Linking Optical and Chemical Properties of Dissolved Organic Matter in Natural Waters

Front Cover
Christopher L. Osburn, Thomas S. Bianchi
Frontiers Media SA, Jan 17, 2017 - Electronic book

 A substantial increase in the number of studies using the optical properties (absorbance and fluorescence) of dissolved organic matter (DOM) as a proxy for its chemical properties in estuaries and the coastal and open ocean has occurred during the last decade. We are making progress on finding the actual chemical compounds or phenomena responsible for DOM’s optical properties. Ultrahigh resolution mass spectrometry, in particular, has made important progress in making the key connections between optics and chemistry. But serious questions remain and the last major special issue on DOM optics and chemistry occurred nearly 10 years ago. Controversies remain from the non-specific optical properties of DOM that are not linked to discrete sources, and sometimes provide conflicting information. The use of optics, which is relatively easier to employ in synoptic and high resolution sampling to determine chemistry, is a critical connection to make and can lead to major advances in our understanding of organic matter cycling in all aquatic ecosystems. The contentions and controversies raised by our poor understanding of the linkages between optics and chemistry of DOM are bottlenecks that need to be addressed and overcome.

 

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Contents

Linking Optical and Chemical Properties of Dissolved Organic Matter in Natural Waters
5
Optical Signatures of Dissolved Organic Matter Transformation in the Global Ocean
8
Characterization and Fate of Dissolved Organic Matter in the Lena River Delta Region Siberia
23
Variation in Riverine Inputs Affect Dissolved Organic Matter Characteristics throughout the Estuarine Gradient
36
Variability in dissolved organic matter optical properties in surface waters in the Amerasian Basin
51
PanArctic Trends in Terrestrial Dissolved Organic Matter from Optical Measurements
60
Predicting Dissolved Lignin Phenol Concentrations in the Coastal Ocean from Chromophoric Dissolved Organic Matter CDOM Absorption Coefficients
78
Optical Proxies for Terrestrial Dissolved Organic Matter in Estuaries and Coastal Waters
93
sources and reactivity
145
Associations Between the Molecular and Optical Properties of Dissolved Organic Matter in the Florida Everglades a Model Coastal Wetland System
155
Implications for the Fluorescencebased Interpretation of Organic Matter Composition
169
Fluorescence Quantum Yields of Natural Organic Matter and Organic Compounds Implications for the Fluorescencebased Interpretation of Organic ...
184
Studies on Hydroxyl Radical Formation and Correlated Photoflocculation Process Using Degraded Wood Leachate as a CDOM Source
195
Depthdependent photodegradation of marine dissolved organic matter
204
Linking Heterotrophic Microbial Activities with Particle Characteristics in Waters of the Mississippi River Delta in the Aftermath of Hurricane Isaac
217
MicrobiallyMediated Fluorescent Organic Matter Transformations in the Deep Ocean Do the Chemical Precursors Matter?
229

Linkages among fluorescent dissolved organic matter dissolved amino acids and ligninderived phenols in a riverinfluenced ocean margin
108
Utilizing colored dissolved organic matter to derive dissolved black carbon export by arctic rivers
122
Are Extracted Materials Truly Representative of Original Samples? Impact of C18 Extraction on CDOM Optical and Chemical Properties
133
Back cover
243
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