<div><p>Water samples were collected using a 12 x 10 L Niskin bottle rosette sampler equipped with a conductivity, temperature, and pressure instrument package (SBE9, Sea-Bird Electronics, Bellevue, Washington, U.S.A.) and a sensor for dissolved oxygen (SBE43, Sea-Bird). </p>
<p>N2O samples were collected in duplicate in 160 mL serum vials. The tubing was placed at the bottom of each container and water overflowed by approximately five volumes. The samples were preserved using 100 μL of a saturated mercuric chloride solution. The serum vials were sealed using butyl septa and aluminum crimp tops, and stored at room temperature, which was cooler than sampling temperature, until analysis.</p>
<p>A 30 mL ultra-high purity N2 headspace was added to each sample using a syringe with a vent needle inserted in the septa to drain sample water. Each headspace was over-pressurized with an additional 2.5 mL of N2 to avoid atmospheric contamination upon headspace sample removal. The headspace was equilibrated with the underlying seawater by gentle shaking at room temperature for at least 2 hours. </p>
<p>N2O concentrations were measured using a headspace equilibration method and analyzed on a Shimadzu GC-14B Gas Chromatograph (GC) equipped with a Porapak-Q packed column and an electron capture detector (ECD) (Elkins 1980). N2O concentrations were calculated according to Walter et al. 2006.</p></div>
<div><p>Related Datasets (also generated from samples during cruises HRS1316 and HRS1317):<br />
* Chesapeake Bay: Ammonia oxidation rates <a href="https://www.bco-dmo.org/dataset/738599">https://www.bco-dmo.org/dataset/738599</a><br />
* Chesapeake Bay: N2 to Ar ratio <a href="https://www.bco-dmo.org/dataset/738604">https://www.bco-dmo.org/dataset/738604</a><br />
* Chesapeake Bay: Nitrate <a href="https://www.bco-dmo.org/dataset/738609">https://www.bco-dmo.org/dataset/738609</a><br />
* Chesapeake Bay: Nitrite <a href="https://www.bco-dmo.org/dataset/738614">https://www.bco-dmo.org/dataset/738614</a><br />
* Chesapeake Bay: Ammonium <a href="https://www.bco-dmo.org/dataset/738619">https://www.bco-dmo.org/dataset/738619</a></p>
<p>The results paper for these data has been submitted to the journal Estuaries and Coasts (Laperriere et al., submitted).</p></div>
Chesapeake Bay: Nitrous Oxide
<div><p>BCO-DMO Data Manager Processing Notes:<br />
* added a conventional header with dataset name, PI name, version date<br />
* modified parameter names to conform with BCO-DMO naming conventions<br />
* blank values in this dataset are displayed as "nd" for "no data." nd is the default missing data identifier in the BCO-DMO system.<br />
* removed spaces between minutes and seconds<br />
* removed trailing and leading spaces of values<br />
* removed occasional space after decimal place in original longitude decimal degree format<br />
* added timestamp in UTC (ISO format)<br />
* changed time format from HH:MM:00 AM/PM to 24 hour time to be consistent with other datasets.</p></div>
738594
Chesapeake Bay: Nitrous Oxide
2018-06-15T15:00:55-04:00
2018-06-15T15:00:55-04:00
2023-07-07T16:10:26-04:00
urn:bcodmo:dataset:738594
Nitrous oxide concentrations from CTD bottle samples collected during R/V Hugh R. Sharp cruises HRS1316 and HRS1317 in Chesapeake Bay from August to September of 2013
false
Santoro, A. E. (2018) Nitrous oxide concentrations from CTD bottle samples collected during R/V Hugh R. Sharp cruises HRS1316 and HRS1317 in Chesapeake Bay from August to September of 2013. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2018-06-15 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/738594 [access date]
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2018-06-15
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