Water isotope values in time series samples (March - October 2020) collected at buoys deployed in northeastern German lake systems

Water isotopes (δ2H and δ18O) were analyzed in samples collected in lakes associated to major riverine systems in northeastern Germany throughout 2020. This sub-dataset is derived from water samples taken at buoys temporarily installed in deep parts of the lake. Samples were taken monthly to bimonthly from March to October 2020. A Limnos water sampler was used to obtain samples from 1 m below water surface. Isotope analysis was conducted at IGB Berlin, using a Picarro L2130-i cavity ring-down spectrometer. Water temperatures were measured in similar depths with an Aqua TROLL 600 multiparameter sonde (In-Situ, Fort Collins, CO, USA). The data give information about the seasonal isotope amplitude in the sampled lakes and about spatial isotope variability in different branches of the associated riverine systems.2020年全年，研究人员对德国东北部与主要河流水系相连的湖泊中采集的水样开展了水同位素（δ²H与δ¹⁸O）分析。本部分子数据集的样本来自临时部署于各湖泊深水区的浮标所采集的水样。采样时段为2020年3月至10月，采样频率为每月至每两月1次。采用Limnos水样采集器采集水面下1米处的水样。同位素分析工作在柏林IGB研究所完成，所用仪器为Picarro L2130-i型腔衰荡光谱仪。采用Aqua TROLL 600型多参数水质探头（In-Situ公司，美国科罗拉多州柯林斯堡）在相同水深处测定水温。本数据集可提供采样湖泊的季节性同位素振幅特征，以及关联河流水系各支流的空间同位素变异性相关信息。