http://lod.bco-dmo.org/id/dataset/938847
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)
Sargassum photochem FTI-CR MS from the Sargassum DOM project
2024-09-25
publication
2024-09-25
revision
BCO-DMO Linked Data URI
2024-09-25
creation
http://lod.bco-dmo.org/id/dataset/938847
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. (2024) Sargassum photochem FTI-CR MS. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2024-09-25 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/938847 [access date]
Dataset Description: <p>SPE-DOM = Solid-Phase Extracted Dissolved Organic Matter&nbsp;<br />
FT-ICR MS =&nbsp;Fourier transform ion cyclotron resonance mass spectrometry</p> Methods and Sampling: <p>For full details on irradiation experiments, please see Related Dataset page https://www.bco-dmo.org/dataset/938807.<br />
<br />
The irradiation experiment described here was a separate experiment to couple with FT-ICR-MS analysis. Because a pH electrode was found to contaminate samples for mass spectrometry, no pH control was used in this experiment (sample pH ~ 4.5). Additionally, the sample volume was doubled compared to other experiments to minimize volume changes when subsampling. The absorbed photon dose was also decreased due to the larger volume, so that a 46 h time point was equivalent to ~20 h exposure in the previous irradiation experiments described in the Photodeg/pH dependence document mentioned above. At time points of 2, 4, 6, 22, and 46 h, 0.2 mL was sampled from the reactor and was added to 0.8 mL of methanol until analysis by ultrahigh resolution mass spectrometry (for full details please related&nbsp;FT-ICR-MS dataset https://www.bco-dmo.org/dataset/938847) using negative ion mode electrospray ionization (ESI). Only CHO formula assignments are described here because they were most abundant using negative ESI mode in the <em>Sargassum</em> SPE-DOM analyzed previously (Powers et al., 2019).&nbsp;</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
onGoing
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
Bruker Solarix 12 Tesla Fourier transform (FT) ion cyclotron resonance (ICR) mass spectrometer located at the Helmholtz Zentrum, Munich, Germany.
theme
None, User defined
Fourier Transform Ion Cyclotron Resonance Mass 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
2024-09-25
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 Sargassum photochem FTI-CR MS from the Sargassum DOM 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
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/938847/data/download
download
onLine
dataset
<p>For full details on irradiation experiments, please see Related Dataset page https://www.bco-dmo.org/dataset/938807.<br />
<br />
The irradiation experiment described here was a separate experiment to couple with FT-ICR-MS analysis. Because a pH electrode was found to contaminate samples for mass spectrometry, no pH control was used in this experiment (sample pH ~ 4.5). Additionally, the sample volume was doubled compared to other experiments to minimize volume changes when subsampling. The absorbed photon dose was also decreased due to the larger volume, so that a 46 h time point was equivalent to ~20 h exposure in the previous irradiation experiments described in the Photodeg/pH dependence document mentioned above. At time points of 2, 4, 6, 22, and 46 h, 0.2 mL was sampled from the reactor and was added to 0.8 mL of methanol until analysis by ultrahigh resolution mass spectrometry (for full details please related&nbsp;FT-ICR-MS dataset https://www.bco-dmo.org/dataset/938847) using negative ion mode electrospray ionization (ESI). Only CHO formula assignments are described here because they were most abundant using negative ESI mode in the <em>Sargassum</em> SPE-DOM analyzed previously (Powers et al., 2019).&nbsp;</p>
Specified by the Principal Investigator(s)
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
Bruker Solarix 12 Tesla Fourier transform (FT) ion cyclotron resonance (ICR) mass spectrometer located at the Helmholtz Zentrum, Munich, Germany.
Bruker Solarix 12 Tesla Fourier transform (FT) ion cyclotron resonance (ICR) mass spectrometer located at the Helmholtz Zentrum, Munich, Germany.
PI Supplied Instrument Name: Bruker Solarix 12 Tesla Fourier transform (FT) ion cyclotron resonance (ICR) mass spectrometer located at the Helmholtz Zentrum, Munich, Germany. Instrument Name: Fourier Transform Ion Cyclotron Resonance Mass Spectrometer Instrument Short Name:FTICR MS Instrument Description: In Fourier Transform Ion Cyclotron Resonance Mass Spectrometry, the mass-to-charge ratio (m/z) of an ion is experimentally determined by measuring the frequency at which the ion processes in a magnetic field. These frequencies, which are typically in the 100 KHz to MHz regime, can be measured with modern electronics making it possible to determine the mass of an ion to within +/- 0.000005 amu or 5 ppm.
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