BCO-DMO-created "master" file of sampling events from the GEOTRACES EPZT cruise, R/V Thomas G. Thompson TN303 in the Eastern Tropical Pacific in 2013 (U.S. GEOTRACES EPZT project)

<p>BCO-DMO-created "master" file of sampling events from the GEOTRACES EPZT cruise. This dataset combines information from the EPZT <a href="http://www.bco-dmo.org/dataset/502618">event log</a>, bottle files (<a href="http://www.bco-dmo.org/dataset/503145">ODF</a> and <a href="http://www.bco-dmo.org/dataset/503133">GT-C</a>), and sampling logs.</p>

<p>Note on depth fields:<br />
ODF reports that the CTDDEPTH column agreed best with depths identified from CTD bottle trips recorded during GEOTRACES CTD acquisition. The depth values in CTDDEPTH column are from the Saunders &amp; Fofonoff 1976 calculation of depth from pressure. This is the same default calculation of depth used by SeaBird (SBE) software. GEOTRACES CTD data acquisition uses SBE software. <strong>It follows that it would be preferable and consistent for GEOTRACES and ODF to use the values in the CTDDEPTH column.</strong></p>

<p>由 BCO-DMO 制作的采样事件 'master' 文件，源自 GEOTRACES EPZT 航次。本数据集整合了 EPZT （<a href="http://www.bco-dmo.org/dataset/502618">事件日志</a>）、瓶样文件（<a href="http://www.bco-dmo.org/dataset/503145">ODF</a> 和 <a href="http://www.bco-dmo.org/dataset/503133">GT-C</a>）以及采样日志中的信息。</p>

<p>关于深度字段注释：<br />
ODF 报告称，CTDDEPTH 列与 GEOTRACES CTD 获取期间记录的 CTD 瓶样航次所确定的深度最为吻合。CTDDEPTH 列中的深度值来自 Saunders & Fofonoff 于 1976 年基于压力计算深度的方法。这与 SeaBird（SBE）软件中使用的默认深度计算方法相同。GEOTRACES CTD 数据获取使用 SBE 软件。因此，对于 GEOTRACES 和 ODF 来说，使用 CTDDEPTH 列中的值将更为可取且保持一致性。</p>