http://lod.bco-dmo.org/id/dataset/964630
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2025-06-11
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Dissolved organic matter (DOM) optical properties in surface waters of the Upper Newport Back Bay estuary in California from May 2021 to July 2022
2025-06-11
publication
2025-06-11
revision
BCO-DMO Linked Data URI
2025-06-11
creation
http://lod.bco-dmo.org/id/dataset/964630
Catherine Clark
Western Washington University
principalInvestigator
Warren de Bruyn
Chapman University
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Clark, C., de Bruyn, W. (2025) Dissolved organic matter (DOM) optical properties in surface waters of the Upper Newport Back Bay estuary in California from May 2021 to July 2022. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2025-06-11 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/964630 [access date]
Optical properties of DOM in estuarine waters Dataset Description: Methods and Sampling: <p>The Newport Back Bay (NBB) is an estuary in Orange County, Southern California, USA. It includes the Upper Newport Back Bay, a ~1000-acre ecological preserve managed by the U.S. Fish and Wildlife Service and the California Department of Fish and Game. This estuary includes salt marshes and mudflats. The primary freshwater input is the San Diego creek which drains a ~150 square mile watershed, with &nbsp;additional freshwater inputs from some storm-water drains.&nbsp; Water samples were collected from 3 sites: Site 1 (inlet; 33.650327, -117.8671967); site 2 (mid-estuary; 33.6302266, -117.8859726); site 3 (near the outlet into the Pacific Ocean; 33.6181867, -117.9051099). When freshwater inflow is significant, site 1 has lower salinity water with higher dissolved organic content.</p>
<p>Surface water (&lt;5 cm) was sampled in the morning from the shore, stored in amber glass bottles, transported to the laboratory, filtered through 0.2 micron Durapore filters and stored in the fridge. &nbsp;Optical properties were measured to assess the dissolved organic content of the sample and allow for the estimation of the photochemical production rates of ethanol and acetaldehyde. Samples were filtered through 0.2 micron Durapore filters to remove microorganisms. Spectra were obtained in a 1 cm quartz cell using a Horiba Aqualog spectrofluorometer.&nbsp; Excitation-emission matrices (EEMs) were also collected (excitation 250-450 nm; emission 250 to 830 nm).&nbsp; Nanopure water was used as the blank. EEMs were corrected for inner filter effects and 1<sup>st</sup> order Rayleigh scattering using post-measurement routines of the Aqualog. Raw absorbance data were used to calculate absorption coefficients.&nbsp;</p>
<p>These methods are described in more detail in Juetten et al. (2025).</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2022112 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2022112
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2022184 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2022184
onGoing
Catherine Clark
Western Washington University
3606506400
Department of Chemistry 516 High Street
Bellingham
WA
982259038
US
clarkc36@wwu.edu
pointOfContact
Warren de Bruyn
Chapman University
7146287353
450 N. Center St., Office 237
Orange
CA
928661005
US
debruyn@chapman.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
date
site
latitude
longitude
BIX
HIX
FIX
Flu
A
C
T
Horiba Aqualog
theme
None, User defined
date
site
latitude
longitude
No BCO-DMO term
fluorescence
Intensity (relative ion abundance)
featureType
BCO-DMO Standard Parameters
Spectrometer
instrument
BCO-DMO Standard Instruments
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
RUI: Collaborative Research: Cycling of ethanol and acetaldyhyde in coastal waters
https://osprey.bco-dmo.org/project/844826
RUI: Collaborative Research: Cycling of ethanol and acetaldyhyde in coastal waters
<p>NSF Award Abstract</p>
<p>Ethanol is added to gasoline to increase octane levels and lower the concentrations of carbon monoxide and surface ozone in the atmosphere. As a renewable fuel, ethanol may also help decrease our dependence on gasoline. Increased use of ethanol in the United States and globally as a fossil fuel substitute and additive is expected to increase ethanol levels in the atmosphere. Atmospheric ethanol is converted to acetaldehyde which is a hazardous pollutant. To understand the impact of increasing ethanol usage, it is important to understand the cycling of ethanol and acetaldehyde in the environment--how they are produced, consumed, and interconverted. Because these compounds can cross from air into water, this requires understanding what happens to these compounds in both the atmosphere and in seawater and other surface waters. This proposal focuses on improving our understanding of processes that produce and consume ethanol and acetaldehyde in coastal seawater and other coastal surface waters like estuaries and salt marshes. This project will measure the rates of photochemical production of ethanol and acetaldehyde, as well as their chemical and biological degradation rates. The project will also measure the rate and efficiency of the biological production of acetaldehyde from ethanol by microbial organisms in these waters. The scientists have an excellent track record of involving undergraduate students, including underrepresented minorities, in their research and as co-authors on publications, a trend they plan to continue with this project. These students would be trained in analytical chemistry and environmental research and would present their research findings at local and national conferences. Lastly, the PIs also plan outreach activities with high school STEM programs to improve student diversity in environmental research.</p>
<p>The primary sink for ethanol in the troposphere is reaction with OH to produce acetaldehyde. Acetaldehyde levels in the troposphere are also expected to increase with increased use of ethanol. Changes in the atmospheric concentrations of these species are expected to have a significant impact on the oxidative capacity of the troposphere. To understand future impacts, it is important to understand current tropospheric budgets which have significant uncertainties for both species. One of the largest sources of uncertainty is the role of the oceans and surface waters in cycling these species into and out of the troposphere. The current understanding is limited by the very small database of ambient concentration measurements in both air and water and an incomplete insight into the processes that control concentrations in seawater and surface waters; these processes represent a complex interplay between biological and photochemical sources and sinks, and air-water exchange. To improve the current understanding of the cycling of ethanol and acetaldehyde in coastal seawater and surface waters, this project will measure: 1) chemical and biological degradation rates of ethanol and acetaldehyde in coastal waters; 2) the rate and efficiency of the biological production of acetaldehyde from ethanol by microbial organisms; 3) ethanol and acetaldehyde concentrations in air and surface waters; 4) the ethanol and acetaldehyde source strength of estuary and saltmarsh sediments; and 5) ethanol and acetaldehyde photochemical production rates in surface waters.</p>
<p>This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.</p>
Coastal Water Cycling
largerWorkCitation
project
eng; USA
oceans
-117.9051099
-117.8671967
33.6181867
33.650327
2021-05-20
2022-07-13
Upper Newport Back Bay estuary in Orange County, Southern California
0
BCO-DMO catalogue of parameters from Dissolved organic matter (DOM) optical properties in surface waters of the Upper Newport Back Bay estuary in California from May 2021 to July 2022
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/966838.rdf
Name: date
Units: unitless
Description: <p>date sample taken</p>
http://lod.bco-dmo.org/id/dataset-parameter/966839.rdf
Name: site
Units: unitless
Description: <p>location sample was taken</p>
http://lod.bco-dmo.org/id/dataset-parameter/966840.rdf
Name: latitude
Units: decimal degrees
Description: <p>sampling latitude, south is negative</p>
http://lod.bco-dmo.org/id/dataset-parameter/966841.rdf
Name: longitude
Units: decimal degrees
Description: <p>sampling longitude, west is negative</p>
http://lod.bco-dmo.org/id/dataset-parameter/966842.rdf
Name: BIX
Units: unitless
Description: <p>index of recent autochthonous contribution</p>
http://lod.bco-dmo.org/id/dataset-parameter/966843.rdf
Name: HIX
Units: unitless
Description: <p>humification index</p>
http://lod.bco-dmo.org/id/dataset-parameter/966844.rdf
Name: FIX
Units: unitless
Description: <p>fluorescence index</p>
http://lod.bco-dmo.org/id/dataset-parameter/966845.rdf
Name: Flu
Units: millivolts (mV)
Description: <p>fluorescence intensity at an excitation of 350 nm and emission of 450 nm</p>
http://lod.bco-dmo.org/id/dataset-parameter/966846.rdf
Name: A
Units: millivolts (mV)
Description: <p>intensity of humic-like peak A</p>
http://lod.bco-dmo.org/id/dataset-parameter/966847.rdf
Name: C
Units: millivolts (mV)
Description: <p>intensity of humic-like peak C</p>
http://lod.bco-dmo.org/id/dataset-parameter/966848.rdf
Name: T
Units: millivolts (mV)
Description: <p>intensity of humic-like peak T</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
https://osprey.bco-dmo.org/dataset/964630/data/download
download
onLine
dataset
<p>The Newport Back Bay (NBB) is an estuary in Orange County, Southern California, USA. It includes the Upper Newport Back Bay, a ~1000-acre ecological preserve managed by the U.S. Fish and Wildlife Service and the California Department of Fish and Game. This estuary includes salt marshes and mudflats. The primary freshwater input is the San Diego creek which drains a ~150 square mile watershed, with &nbsp;additional freshwater inputs from some storm-water drains.&nbsp; Water samples were collected from 3 sites: Site 1 (inlet; 33.650327, -117.8671967); site 2 (mid-estuary; 33.6302266, -117.8859726); site 3 (near the outlet into the Pacific Ocean; 33.6181867, -117.9051099). When freshwater inflow is significant, site 1 has lower salinity water with higher dissolved organic content.</p>
<p>Surface water (&lt;5 cm) was sampled in the morning from the shore, stored in amber glass bottles, transported to the laboratory, filtered through 0.2 micron Durapore filters and stored in the fridge. &nbsp;Optical properties were measured to assess the dissolved organic content of the sample and allow for the estimation of the photochemical production rates of ethanol and acetaldehyde. Samples were filtered through 0.2 micron Durapore filters to remove microorganisms. Spectra were obtained in a 1 cm quartz cell using a Horiba Aqualog spectrofluorometer.&nbsp; Excitation-emission matrices (EEMs) were also collected (excitation 250-450 nm; emission 250 to 830 nm).&nbsp; Nanopure water was used as the blank. EEMs were corrected for inner filter effects and 1<sup>st</sup> order Rayleigh scattering using post-measurement routines of the Aqualog. Raw absorbance data were used to calculate absorption coefficients.&nbsp;</p>
<p>These methods are described in more detail in Juetten et al. (2025).</p>
Specified by the Principal Investigator(s)
<p>The maximum fluorescence intensity associated with terrestrial humic-like peaks A and C and protein-like peak T in the measured EEMs were recorded. The EEMs were used to calculate several optical indices. The fluorescence index (FIX) is the ratio of emission at 450 nm to emission at 500 nm for an excitation of 370 nm. FIX is about 1.3 for allochthonous terrestrial and soil material and higher at ~1.9 for autochthonous aquatic and microbial sources. &nbsp;The humification index (HIX) is the ratio of integrated emission intensities from 435 – 480 nm and 300 – 345 nm at 254 nm excitation. More aromatic, humified terrestrial material typically has higher HIX values . &nbsp;The index of recent autochthonous contribution (BIX) is the ratio of emission intensities at 380 and 430 nm for an excitation of 310 nm. BIX &lt; 0.6 have been associated with terrestrial DOM sources and BIX &gt;1 have been attributed to autochthonous inputs. This is summarized from Juetten et al. (2025).</p>
Specified by the Principal Investigator(s)
* added lat/lon of each sampling site to dataset
* converted date to ISO format
Specified by BCO-DMO Data Managers
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
Horiba Aqualog
Horiba Aqualog
PI Supplied Instrument Name: Horiba Aqualog PI Supplied Instrument Description:Horiba Aqualog spectrometer was used to measure optical properties of DOM Instrument Name: Spectrometer Instrument Short Name:Spectrometer Instrument Description: A spectrometer is an optical instrument used to measure properties of light over a specific portion of the electromagnetic spectrum. Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0460/