http://lod.bco-dmo.org/id/dataset/938783
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
2024-09-25
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Absorbance spectra from niskin bottle samples collected with depth profiles during R/V Hugh R. Sharp cruise HRS1608 Mid-Atlantic Bight in 2016
2024-09-25
publication
2024-09-25
revision
Woods Hole Oceanographic Institution (WHOI BCO-DMO)
2026-02-06
publication
https://doi.org/10.26008/1912/bco-dmo.938783.1
Michael Gonsior
University of Maryland Center for Environmental Science
principalInvestigator
Neil V. Blough
University of Maryland - College Park
principalInvestigator
Rossana Del Vecchio
University of Maryland - College Park
principalInvestigator
Leanne Powers
University of Maryland Center for Environmental Science
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: Gonsior, M., Blough, N. V., Del Vecchio, R., Powers, L. (2026) Absorbance spectra from niskin bottle samples collected with depth profiles during R/V Hugh R. Sharp cruise HRS1608 Mid-Atlantic Bight in 2016. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2024-09-25 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.938783.1 [access date]
Methods and Sampling: <p>Samples were transferred from Niskin bottles to clean 10L low-density polyethylene cubitainers using silicon tubing. Containers were rinsed three times with sample before final collection.&nbsp;</p>
<p>Sampling and analytical procedures:&nbsp;</p>
<p>Subsamples for fluorescence and absorbance were 0.2 µm filtered using Whatman GD/X cellulose acetate syringe filters. Filters were rinsed with ~20mL sample before collecting samples in combusted 40mL amber glass vials.&nbsp; See "Related Datasets" section for the fluorescence data.&nbsp;&nbsp;Samples stored at 4°C until analysis (within 1 week of collection). For fluorescence and absorbance measurements, samples were transferred to 1 cm quartz fluorescence cuvette and analyzed using a Horiba Aqualog spectrofluorometer. Absorbance was recorded from excitation wavelengths 240 to 600 at 3 nm intervals. Fluorescence emission was recorded from ~243 to 297 nm at fixed ~3.3 nm intervals to created excitation-emission matrix (EEM) spectra. Integration time = 2s. Ultrapure water used as the fluorescence blank and was subtracted from all EEM spectra.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1536888 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1536888
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1536927 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1536927
completed
Michael Gonsior
University of Maryland Center for Environmental Science
410-326-7245
146 Williams Street
Solomons
MD
20688-3204
USA
gonsior.michael@gmail.com
pointOfContact
Neil V. Blough
University of Maryland - College Park
301-405-0051
Chemistry Bldg 8051 Regents Dr
College Park
MD
20742
USA
neilb@umd.edu
pointOfContact
Rossana Del Vecchio
University of Maryland - College Park
240-502-5381
5825 University Research Ct
College Park
MD
20740
USA
rossdv@umd.edu
pointOfContact
Leanne Powers
University of Maryland Center for Environmental Science
315-470-6854
lcpowers@esf.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
date
Time
ISO_DateTime_UTC
Lat
Long
Salinity
depth_sample
depth_sample_comment
file_name
E2_to_E3
E2_to_E3_flag
S275_to_295
S275_to_295_flag
S350_to_400
S350_to_400_flag
S_R
S_R_flag
Horiba Aqualog spectrofluorometer
theme
None, User defined
date
time of day
ISO_DateTime_UTC
latitude
longitude
salinity
depth
sample description
file_name
No BCO-DMO term
featureType
BCO-DMO Standard Parameters
Spectrometer
instrument
BCO-DMO Standard Instruments
HRS1608
service
Deployment Activity
MidAtlantic
place
Locations
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.
Collaborative Research: Phlorotannins - An Important Source of Marine Chromophoric Dissolved Organic Matter?
https://osprey.bco-dmo.org/project/814753
Collaborative Research: Phlorotannins - An Important Source of Marine Chromophoric Dissolved Organic Matter?
<p>NSF Award Abstract:</p>
<p>Chromophoric dissolved organic matter (CDOM), the sunlight absorbing components in filtered water, is important in the study of marine and freshwater ecosystems as it can be used to trace the mixing of surface waters, as a proxy for carbon cycles, and other biogeochemical processes. Although its importance in ocean studies has been firmly established over the last several decades, sources and structural composition of CDOM within the oceans remains unclear and continues to be a subject of debate. Sargassum, a brown alga, is widely distributed in temperate and subtropical marine waters and may be important source of CDOM to the Sargasso Sea and Gulf of Mexico where Sargassum is abundant. This project will investigate the contribution of macro brown algae-derived compounds to the marine CDOM pool. Results from this study will have implications for the marine carbon cycle and satellite remote sensing of ocean color to assess mixing of surface water masses and biogeochemical processes. The project will provide educational opportunities for a postdoctoral scholar, summertime undergraduate internships (through a local NSF-sponsored Research Experiences for Undergraduates (REU) program), and workshop and research opportunities for local high schools students.</p>
<p>Sources of marine CDOM remain debatable and a comprehensive understanding of its origins, distribution and fate have been difficult. Marine CDOM, and in particular the "humic-like" component, have been suggested to originate from terrestrial sources, primarily lignins. However, recent evidence indicates that the exudation of phlorotannins produced by macro brown algae may contribute significantly to the marine CDOM pool. Phlorotannins, a class of polyphenols that are only found in, and continuously exuded by macro brown algae such as Sargassum, strongly absorb ultraviolet light and may have been underestimated in their contribution to the marine CDOM pool within certain geographic locales. Upon partial oxidation, light absorption by these specific compounds extends into longer wavelengths in the visible creating an absorption spectrum similar to that of lignin. These phlorotannins and their transformation products absorb light that might explain in part the "humic-like" signatures observed in open ocean environments. This study aims to characterize the optical properties and molecular composition of Sargassum-derived CDOM including its aerobic oxidation and photochemical behavior, as well as quantify Sargassum-derived CDOM to better estimate its possible contribution to the CDOM pool in the Sargasso Sea and Gulf of Mexico.</p>
Sargassum DOM
largerWorkCitation
project
eng; USA
oceans
MidAtlantic
-75.8035
-74.10417
34.34967
37.98133
2016-07-18
2016-07-22
Mid-Atlantic Bight (July 2016), Sargasso Sea (July and September 2016), Coastal Bermuda (September/October 2016) and Coastal Puerto Rico (Laguna Grande, Fajardo; Las Croabas, Fajardo; Salinas; May/June 2018)
0
BCO-DMO catalogue of parameters from Absorbance spectra from niskin bottle samples collected with depth profiles during R/V Hugh R. Sharp cruise HRS1608 Mid-Atlantic Bight in 2016
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/939023.rdf
Name: date
Units: unitless
Description: <p>Sampling date</p>
http://lod.bco-dmo.org/id/dataset-parameter/939024.rdf
Name: Time
Units: unitless
Description: <p>Time of cast (in UTC time zone)</p>
http://lod.bco-dmo.org/id/dataset-parameter/939025.rdf
Name: ISO_DateTime_UTC
Units: unitless
Description: <p>DateTime of cast with time zone (in ISO 8601 format)</p>
http://lod.bco-dmo.org/id/dataset-parameter/939026.rdf
Name: Lat
Units: decimal degrees
Description: <p>Latitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/939027.rdf
Name: Long
Units: decimal degrees
Description: <p>Longitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/939028.rdf
Name: Salinity
Units: unitless
Description: <p>Salinity. Practical Salinity Scale 1978 (PSS-78)</p>
http://lod.bco-dmo.org/id/dataset-parameter/939029.rdf
Name: depth_sample
Units: meters (m)
Description: <p>sampling depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/939030.rdf
Name: depth_sample_comment
Units: unitless
Description: <p>sampling depth description (e.g. "Chl max")</p>
http://lod.bco-dmo.org/id/dataset-parameter/939031.rdf
Name: file_name
Units: unitless
Description: <p>associated absorbance file (.dat). These files are included in SharpCruise_optics_abs.zip (See supplemental files).</p>
http://lod.bco-dmo.org/id/dataset-parameter/939032.rdf
Name: E2_to_E3
Units: unitless
Description: <p>E2:E3. Ratio of A(250)/A(364)</p>
http://lod.bco-dmo.org/id/dataset-parameter/939033.rdf
Name: E2_to_E3_flag
Units: unitless
Description: <p>Flag column for the E2_to_E3 column. "BD" indicates the E2_to_E3 value is missing due to being below the detection limit.</p>
http://lod.bco-dmo.org/id/dataset-parameter/939034.rdf
Name: S275_to_295
Units: 1/nm
Description: <p>S(275-295). spectral slope from 275-295 nm</p>
http://lod.bco-dmo.org/id/dataset-parameter/939035.rdf
Name: S275_to_295_flag
Units: unitless
Description: <p>Flag column for the S275_to_295 column. "BD" indicates the S275_to_295 value is missing due to being below the detection limit.</p>
http://lod.bco-dmo.org/id/dataset-parameter/939036.rdf
Name: S350_to_400
Units: 1/nm
Description: <p>S(350-400). spectral slope from 350-400 nm</p>
http://lod.bco-dmo.org/id/dataset-parameter/939037.rdf
Name: S350_to_400_flag
Units: unitless
Description: <p>Flag column for the S350_to_400 column. "BD" indicates the S350_to_400 value is missing due to being below the detection limit.</p>
http://lod.bco-dmo.org/id/dataset-parameter/939038.rdf
Name: S_R
Units: unitless
Description: <p>ratio of S(275-295)/S(350-400)</p>
http://lod.bco-dmo.org/id/dataset-parameter/939039.rdf
Name: S_R_flag
Units: unitless
Description: <p>Flag column for the S_R column. Indicates BD if the S_R value is missing due to being below the detection limit.</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://doi.org/10.26008/1912/bco-dmo.938783.1
download
onLine
dataset
<p>Samples were transferred from Niskin bottles to clean 10L low-density polyethylene cubitainers using silicon tubing. Containers were rinsed three times with sample before final collection.&nbsp;</p>
<p>Sampling and analytical procedures:&nbsp;</p>
<p>Subsamples for fluorescence and absorbance were 0.2 µm filtered using Whatman GD/X cellulose acetate syringe filters. Filters were rinsed with ~20mL sample before collecting samples in combusted 40mL amber glass vials.&nbsp; See "Related Datasets" section for the fluorescence data.&nbsp;&nbsp;Samples stored at 4°C until analysis (within 1 week of collection). For fluorescence and absorbance measurements, samples were transferred to 1 cm quartz fluorescence cuvette and analyzed using a Horiba Aqualog spectrofluorometer. Absorbance was recorded from excitation wavelengths 240 to 600 at 3 nm intervals. Fluorescence emission was recorded from ~243 to 297 nm at fixed ~3.3 nm intervals to created excitation-emission matrix (EEM) spectra. Integration time = 2s. Ultrapure water used as the fluorescence blank and was subtracted from all EEM spectra.</p>
Specified by the Principal Investigator(s)
<p><strong>Absorbance .dat files&nbsp;</strong>(see "Supplemental Files" section):&nbsp;the only data used from these files for this dataset are the first column (Wavelength in nm) and the second to last column (column J, Abs, OD, which is the blank corrected absorbance, OD refers to optical density and is unitless).<br />
<br />
Blank corrected absorbance spectra (A(λ)) were converted to Naperian absorption coefficient spectra (a(λ)) using the equation a(λ) = 2.303xa(λ)/L where L = 0.01 m. Spectral slopes were determined from 275-295 nm (S(275-295)) and from 350 – 400 nm (S(350-400)) as the slope of the log-normalized absorbance spectrum from 275-295 nm and 350-400 nm, respectively. Slope ratio (SR) is the ratio of S(275-295) to S(350-400) as defined previously (Helms et al. 2008). E2:E3 ratio is the ratio of absorbance at 250 nm to that 365 nm (De Haan and De Boer 1987).</p>
Specified by the Principal Investigator(s)
Preprocessing for version 1:
* Sheet "absorbance" of submitted file "Cruise_fluor_abs.xlsx" was imported into the BCO-DMO data system for this dataset. Values "NA" were imported as missing data values. The other sheet in the file "absorbance" was added to BCO-DMO as a related dataset.
** Missing data values are displayed differently based on the file format you download. They are blank in csv files, "NaN" in MatLab files, etc.
* Metadata for this dataset was extracted from file "DATASET_Cruise_optical_properties.rtf"
* Column (E2_to_E3,S275_to_295, S350_to_400, S_R) with values "BD" for below detection limit within the column had an additional _flag column added to indicate why data were blank in the numeric column.
* Column names adjusted to conform to BCO-DMO naming conventions designed to support broad re-use by a variety of research tools and scripting languages. [Only numbers, letters, and underscores. Can not start with a number]
* DateTime with timezone column added (ISO 8601 format).
* Lat lon columns converted to decimal degrees.
Dataset Version 1:
* Submitter used the revised data described above and resubmitted the data table as "938783_v1_cruise-opt-prop-abs REVISED.csv" which corrected three out of bounds latitudes (originally provided as decimal decimal minutes "345 56.14") with the correct value in decimal degree format 35.93567 (should have been 35 56.14 in "Cruise_fluor_abs.xlsx" ).
* raw .dat files were bundled into a .zip file and attached as a supplemental file to this dataset.
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 spectrofluorometer
Horiba Aqualog spectrofluorometer
PI Supplied Instrument Name: Horiba Aqualog spectrofluorometer 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/
Cruise: HRS1608
HRS1608
R/V Hugh R. Sharp
Community Standard Description
International Council for the Exploration of the Sea
R/V Hugh R. Sharp
vessel
HRS1608
Michael Gonsior
University of Maryland Center for Environmental Science
R/V Hugh R. Sharp
Community Standard Description
International Council for the Exploration of the Sea
R/V Hugh R. Sharp
vessel