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>本数据集的放射性核素检测结果源自表层及水下采水瓶样品，采用高纯锗探测器(high purity germanium detectors)进行测定，并参照国际原子能机构（International Atomic Energy Agency，简称IAEA）标准完成校准，具体实验流程如Buesseler等人2012年发表于《美国国家科学院院刊》（PNAS）的研究所述。 铯同位素137Cs与134Cs的浓度以贝可勒尔（Becquerel，缩写Bq）每立方米（Bq/m³）为单位进行报告，其中1贝可勒尔等同于每秒一次核衰变。 **修改历史：** 数据版本2（2012年12月17日）替代了数据版本1（2012年10月）。 需注意，更新后的铯同位素检测数据由Ken Buesseler于2012年10月提供。本在线数据集已完成修订以纳入该批测量结果，相关更新内容的PDF版本可通过补充文件`WHOI_KOK_Cs_data_Table_S1_Oct_2012_update.pdf`获取。本次更新后的数据格式与2012年Buesseler等人发表于PNAS的论文中的表S1完全一致。新旧数据集的整体偏差为0.3%，但存在少量数值的调整幅度达到5%及以上。本次更新基于采用电感耦合等离子体质谱仪（Inductively Coupled Plasma Mass Spectrometry，简称ICP-MS）对稳定铯进行化学产率测定的第二轮实验结果。