The fraction of water last ventilated in a given region regardless of the time elapsed since ventilation (in practice, younger than 4000 years) based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011

<p>Water mass fractions and ages calculated from hydrographic and tracer data using a maximum-entropy inversion technique.</p>

<p>This dataset&nbsp;contains the fraction of water last ventilated in a given region regardless of the time elapsed since ventilation (in practice, younger than 4000 years) as well as the corresponding&nbsp;ensemble standard deviations.</p>

<p>Data File Formats:<br />
For a .csv or .tsv format of these data, use the \"Get Data\" button at the top of the BCO-DMO metadata page.&nbsp;<br />
For a Matlab file containing all of the water mass fraction data from this project, see the \"Data Files\" section of the BCO-DMO metadata page.</p>

本数据集基于水文数据（hydrographic data）与示踪剂数据（tracer data），采用最大熵反演技术（maximum-entropy inversion technique）计算得到水团分数（water mass fractions）与水团年龄。

本数据集涵盖了指定区域内经最后一次水团通风形成的水团占比（不计通风后历经的时长，实际年龄小于4000年），以及对应的集合标准差（ensemble standard deviations）。

数据文件格式：<br />若需获取本数据集的.csv或.tsv格式文件，请前往BCO-DMO元数据页面顶部点击"Get Data"（获取数据）按钮。<br />若需获取包含本项目全部水团分数数据的Matlab文件，请查阅BCO-DMO元数据页面的"Data Files"（数据文件）板块。