Integration of global precipitation stable isotope data
Description
Dataset of stable isotope data for precipitation in the global from 1961 to 2023. It includes a total of 2059 stations with a total of 141,624 data records.
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Data Collection: The collected data contained many missing values, anomalies, duplicate entries, as well as missing dates, and errors or absences in geographic coordinates (latitude and longitude). Consequently, the raw data was preprocessed and cleaned. Missing data was interpolated, and data entries that could not be completed, as well as duplicate data, were deleted. Measured Data: Precipitation samples were collected using a standard rain gauge. Immediately after each precipitation event, the collected precipitation samples were transferred to 100ml high-density sample bottles. To prevent data errors due to evaporation, the collected water samples were stored in a refrigerator at approximately 4°C. At the start of the experiments, the precipitation samples were naturally thawed at room temperature. During sampling, a 0.45μm filter was used to filter impurities, and the samples were transferred to 2ml sample bottles. The isotopic values were determined using a Liquid Water Isotope Analyzer (DLT-100, Los Gatos Research, USA). For each sample, six measurements were taken, discarding the first two results to avoid cross-sample influence. For values that were anomalies or not verified by the LWIA post Analysis software, we reselected parallel samples for measurement to ensure the accuracy of the data. The isotopic abundances of 18O and 2H are denoted using the delta (δ) symbol relative to the Vienna Standard Mean Ocean Water (V-SMOW) standard.