Surface and hydrocast Cesium isotopes 137 and 134 concentrations from the R/V Ka`imikai-O-Kanaloa KOK1108 cruise in June 2011 in the Northwest Pacific Ocean (Fukushima Radionuclide Levels project)

<p>Radionuclide results from surface and hydrocast bottle samples were determined from high purity germanium detectors and calibrated against IAEA standards as described in Buesseler et al. (PNAS, 2012).</p>

<p>Concentrations of Cesium isotopes 137Cs and 134Cs are reported in units of Bq (1 Becquerel = one disintegration per second) per unit volume (Bq/meter^3).</p>

<p><strong>Modification History:</strong><br />
Data version 2 (2012-12-17)&nbsp;replaced&nbsp;Data version 1 (2012-10).<br />
Note that updated Cesium data measurements were contributed by Ken Buesseler in October 2012.&nbsp; The online dataset has been revised to include these measurements.&nbsp; A PDF version of these updates is available (See supplemental file&nbsp;WHOI_KOK_Cs_data_Table_S1_Oct_2012_update.pdf).&nbsp;The data are in the same format as Table S1 in the 2012 Buesseler et al. PNAS paper cited below. The net difference in old vs. new is 0.3%, but a few values have changed&nbsp; by 5% or more. The update reflects a second run of the chemical yields measured for stable Cs by ICPMS.</p>

表层水样及水下采水瓶采集的水样的放射性核素检测结果，通过高纯锗探测器完成测定，并参照国际原子能机构（International Atomic Energy Agency, IAEA）标准进行校准，具体实验流程参见Buesseler等人2012年发表于《美国国家科学院院刊》（Proceedings of the National Academy of Sciences, PNAS）的研究。

铯同位素137Cs与134Cs的浓度以贝克勒尔每立方米（Bq/m³）为单位报告，其中1贝克勒尔（Becquerel）等价于每秒一次核衰变。

**修改历史：**
数据版本2（2012年12月17日）取代了数据版本1（2012年10月）。2012年10月，Ken Buesseler提供了更新后的铯同位素检测数据，在线数据集已据此完成修订以纳入该批数据。本次更新的PDF版本可通过附件文件WHOI_KOK_Cs_data_Table_S1_Oct_2012_update.pdf获取。数据格式与下文引用的2012年Buesseler等人发表于PNAS的论文中的表S1一致。新旧数据的总体差异为0.3%，但部分数值的变化幅度达到5%及以上。此次更新基于通过电感耦合等离子体质谱（Inductively Coupled Plasma Mass Spectrometry, ICP-MS）对稳定铯进行化学产率测定的二次实验结果。