<div><p>DOM was collected in Doboy Sound off the southeastern U.S. in November 2012, May 2013 and September 2013. At least 3 replicates were collected for each sample. Immediately after collection, samples were filtered (using 0.7 μm Whatman GF/F filters pre-combusted at 450°C for 5 h and pre-washed 0.2 μm Pall Supor membrane filters), and aliquots were stored frozen for DOC analysis. Filtrates were acidified to pH 2, and DOM was isolated using solid phase extraction (SPE) cartridges (Agilent Bond Elut PPL) as in Dittmar et al. (2008).</p>
<p>DOC concentrations from water samples and extracts (i.e., dried and resuspended in ultrapure water) were measured with a Shimadzu TOC-VCPH analyzer. SPE efficiency across all samples was 75±7% of the DOC.</p>
<p>Bulk delta-13C ratios of extracted DOC (SPE-DOC) were measured with a Finnigan MAT 251 isotope ratio mass spectrometer after complete drying. Precision and accuracy was better than 1 ppt, and procedural blanks did not yield detectable amounts of carbon isotopes. The molecular composition of the DOM extracts (15 mg C L-1 in 1:1 methanol/water) was analyzed using a 15T Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS; Bruker Daltonics) with electrospray ionization (negative mode) as in Seidel et al. (2014).</p></div>
DOM, delta13C, and salinity from samples collected during the SIMCO1 and SIMCO2
<div><p>Field collected DOC from estuarine waters near Sapelo Island, GA in 2012 and 2013 was analyzed for chemical composition. Analysis of the dissolved organic matter pool retrieved by solid phase extraction (PPL resin) was analyzed to determine delta-13C ratios and carbon concentration.</p></div>
SIMCO Pilot Study: DOC, delta13C and salinity
<div><p><strong>References:</strong></p>
<p>Dittmar, T., Boris Koch, Norbert Hertkorn, and Gerhard Kattner. 2008. A simple and efficient method for the solid-phase extraction of dissolved organic matter (SPE-DOM) from seawaterLimnol. Oceanogr.: Methods 6, 2008, 230-235</p>
<p>Medeiros, P. M., M. Seidel, T. Dittmar, W. B. Whitman, and M. A. Moran (2015), Drought-induced variability in dissolved organic matter composition in a marshdominated estuary, Geophys. Res. Lett., 42, 6446–6453, doi:10.1002/ 2015GL064653.</p>
<p>Seidel, M., Melanie Beck, Thomas Riedel, Hannelore Waska, I G.N.A. Suryaputra, d, Bernhard Schnetger, Jutta Niggemann, Meinhard Simonc, Thorsten Dittmar. 2014. Biogeochemistry of dissolved organic matter in an anoxic intertidal creek bank. Geochimica et Cosmochimica Acta 140:418-434. <a href="https://dx.doi.org/10.1016/j.gca.2014.05.038">http://dx.doi.org/10.1016/j.gca.2014.05.038</a></p>
<p><strong>BCO-DMO Processing:</strong><br />
- added conventional header with dataset name, PI name, version date<br />
- column names reformatted to comply with BCO-DMO standards<br />
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661880
SIMCO Pilot Study: DOC, delta13C and salinity
2016-10-18T14:54:04-04:00
2016-10-18T14:54:04-04:00
2023-07-07T16:10:26-04:00
urn:bcodmo:dataset:661880
Characterization of dissolved organic carbon (DOC) in estuarine waters near Sapelo Island, GA, using ultrahigh-resolution mass spectrometry and stable carbon isotope analyses.
false
Moran, M. Ann, Medeiros, P. M. (2016) Characterization of dissolved organic carbon (DOC) in estuarine waters near Sapelo Island, GA, using ultrahigh-resolution mass spectrometry and stable carbon isotope analyses. Biological and Chemical Oceanography Data Management Office (BCO-DMO). Version Date 2016-10-26 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/661880 [access date]
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2016-10-26
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