Short-lived radioisotope (SLRad) data collected R/V Weatherbird II cruises WB-0813 and WB-1405 in the northern Gulf of Mexico from 2013-08-16 to 2013-09-27

This dataset contains short-lived radioisotope (SLRad) data collected aboard R/V Weatherbird II cruises WB-0813 and WB-1405 in the northern Gulf of Mexico from 2013-08-16 to 2013-09-27. SLRad data were generated for selected core sub-samples at 2mm sampling intervals for “surficial unit” and 5mm sampling resolution intervals to the base of cores. SLRad data generated include sample activity as disintegrations per minute per gram (dpm/g) of 1) Excess Thorium-234 (234Thxs) activity, which is calculated by measuring the total Thorium-234 (234ThTot) activity and the subtraction of the measured or estimated “Supported” Thorium-234 (234ThSup) activity, 2) Excess Lead-210 (210Pbxs) activity, which is calculated by measuring the total Lead-210 (210PbTot) activity and subtraction of the measured background "supported" Lead-210 (210PbSup) activity {average of Lead-214 (214Pb) at 295 kiloelectron volts (keV), 214Pb at 351keV, and Bismuth-214 (214Bi) at 609keV}, 3) Cesium-137 (137Cs) activity, and 4) Berilium-7 (7Be) activity. Cruise documentation was provided for each of the R/V Weatherbird II cruises. The cruises were led by chief scientists Dr. Steve Murawski and Dr. David Hollander (WB-0813), and Dr. Oscar Garcia (WB-1405)

本数据集收录了2013年8月16日至2013年9月27日期间，于墨西哥湾北部搭乘“天气鸟二号”（R/V Weatherbird II）科考船执行WB-0813、WB-1405航次所采集的短寿命放射性同位素（short-lived radioisotope, SLRad）数据。
针对选定的岩心子样，短寿命放射性同位素数据以每分钟衰变数每克（disintegrations per minute per gram, dpm/g）为活度单位，其中“表层单元”以2毫米采样间隔采集数据，其余层位以5毫米采样分辨率直至岩心底部完成采样。本次生成的短寿命放射性同位素数据涵盖以下四项活度指标：
1. 过剩钍-234（Excess Thorium-234, 234Thxs）活度：通过测定总钍-234（234ThTot）活度，并扣除实测或估算的平衡态钍-234（234ThSup）活度计算得到；
2. 过剩铅-210（Excess Lead-210, 210Pbxs）活度：通过测定总铅-210（210PbTot）活度，并扣除实测背景“平衡态”铅-210（210PbSup）活度计算得到，其中平衡态铅-210活度以铅-214（214Pb）在295千电子伏特（keV）、351千电子伏特处的活度，以及铋-214（214Bi）在609千电子伏特处的活度的平均值表征；
3. 铯-137（137Cs）活度；
4. 铍-7（7Be）活度（原文存在拼写笔误，原写为Berilium，标准拼写为Beryllium）。
两次“天气鸟二号”航次均配有完整的航次文档。其中WB-0813航次的首席科学家为史蒂夫·穆拉夫斯基博士与戴维·霍兰德博士，WB-1405航次的首席科学家为奥斯卡·加西亚博士。