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            <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset/473296.rdf" xlink:actuate="onRequest">Inorganic and organic nutrient data from Niskin bottles from R/V Knorr cruise KN210-04 in the Western Atlantic Ocean between Uruguay and Barbados in 2013 (Deep Atlantic DOM project)</gmx:Anchor>
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            <gco:CharacterString>Cite this dataset as: Kujawinski, E., Longnecker, K. (2016) Inorganic and organic nutrient data from Niskin bottles from R/V Knorr cruise KN210-04 in the Western Atlantic Ocean between Uruguay and Barbados in 2013 (Deep Atlantic DOM project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2016-07-25 [if applicable, indicate subset used]. doi:10.1575/1912/bco-dmo.473296.1 [access date]</gco:CharacterString>
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        <gco:CharacterString>Inorganic and organic nutrient data from Niskin bottles. Dataset Description: &amp;lt;p&amp;gt;Inorganic and organic nutrient data from Niskin bottles from the KN210-04 cruise. Data include concentration of: phosphate, nitrate+nitrite, silicate, nitrite, ammonium, non-purgeable organic carbon, and total nitrogen.&amp;lt;/p&amp;gt; Methods and Sampling: &amp;lt;p&amp;gt;Samples for inorganic nutrient analysis were collected in HDPE bottles and frozen (-20ºC) immediately after sample collection. Samples were kept frozen until processing by Joe Jennings at Oregon State University. The analyses for phosphate (PO4), nitrate plus nitrite (NO3_NO2), nitrite (NO2), ammonium (NH4), and silicic acid (silicate) were performed using a hybrid Technicon AutoAnalyzerII and Alpkem RFA300 system following protocols modified from Gordon et al. (see below for reference). The estimated precision for each element was as follows: PO4, ± 0.008 µM; NO3_NO2, ± 0.15 µM; NO2, ± 0.01 µM; silicic acid, ± 0.3 µM.&amp;lt;/p&amp;gt;

&amp;lt;p&amp;gt;To obtain the concentration of total organic carbon (TOC) and total nitrogen (TN), a 40 ml aliquot of whole seawater was acidified to pH~3 with concentrated hydrochloric acid (HCl) and stored in combusted glass vials at 4°C until analysis with a Shimadzu TOC-VCSH total organic carbon analyzer coupled to a TNM-1 analyzer. Blanks (MilliQ water) and standard curves with potassium hydrogen phthalate and potassium nitrate were interspersed into the sample runs. The coefficient of variability between replicate injections was &amp;amp;lt;1%. Comparisons to standards provided by Prof. D. Hansell (University of Miami) were made daily.&amp;lt;/p&amp;gt;

&amp;lt;p&amp;gt;&amp;lt;em&amp;gt;References:&amp;lt;/em&amp;gt;&amp;lt;br /&amp;gt;
Gordon, L. I., J. C. Jennings, Jr., A. A. Ross, and J. M. Krest. 1994. A suggested protocol for continuous flow automated analysis of seawater nutrients (phosphate, nitrate, nitrite and silicic acid) in the WOCE Hydrographic Program and the Joint Global Ocean Fluxes Study. In WOCE operations manual. WOCE report no. 68/91, revision 1. WHP Office Report WHPO91-1. Woods Hole Oceanographic Institution, Woods Hole, Mass.&amp;lt;/p&amp;gt;</gco:CharacterString>
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&lt;p&gt;In recent years, a research team at Woods Hole Oceanographic Institution has acquired the necessary analytical capability. As such, in this project, they will carry out the first systematic survey of deep ocean DOM in the western Atlantic Ocean to characterize the low molecular weight fraction of DOM in southward flowing North Atlantic Deep Water (NADW), northward flowing Antarctic Bottom Water (AABW), and Antarctic Intermediate Water (AAIW).  Using ultrahigh resolution mass spectrometry and multi-stage fragmentation coupled to liquid chromatography, the scientists will determine the spatial variability in the composition of DOM along the flow path of the water masses, as well as assess the source water, transport, and surface processes that contribute to temporal changes in DOM composition.  These results will be augmented with structural elucidation and quantitative assays of unique marker compounds for each water mass.  Results will provide important insights into the biogeochemical reactions that govern DOM dynamics in the deep ocean.&lt;/p&gt;</gco:CharacterString>
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&amp;lt;p&amp;gt;To obtain the concentration of total organic carbon (TOC) and total nitrogen (TN), a 40 ml aliquot of whole seawater was acidified to pH~3 with concentrated hydrochloric acid (HCl) and stored in combusted glass vials at 4°C until analysis with a Shimadzu TOC-VCSH total organic carbon analyzer coupled to a TNM-1 analyzer. Blanks (MilliQ water) and standard curves with potassium hydrogen phthalate and potassium nitrate were interspersed into the sample runs. The coefficient of variability between replicate injections was &amp;amp;lt;1%. Comparisons to standards provided by Prof. D. Hansell (University of Miami) were made daily.&amp;lt;/p&amp;gt;

&amp;lt;p&amp;gt;&amp;lt;em&amp;gt;References:&amp;lt;/em&amp;gt;&amp;lt;br /&amp;gt;
Gordon, L. I., J. C. Jennings, Jr., A. A. Ross, and J. M. Krest. 1994. A suggested protocol for continuous flow automated analysis of seawater nutrients (phosphate, nitrate, nitrite and silicic acid) in the WOCE Hydrographic Program and the Joint Global Ocean Fluxes Study. In WOCE operations manual. WOCE report no. 68/91, revision 1. WHP Office Report WHPO91-1. Woods Hole Oceanographic Institution, Woods Hole, Mass.&amp;lt;/p&amp;gt;</gco:CharacterString>
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&amp;lt;p&amp;gt;BCO-DMO Processing Notes:&amp;lt;br /&amp;gt;
- Parameter names were modified to conform with BCO-DMO naming conventions.&amp;lt;br /&amp;gt;
- lat_start and lon_start were added by joining the data to the event log and matching on the unique event number.&amp;lt;br /&amp;gt;
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