README for Calibrated Dataset

Overview

This dataset contains isotopic calibration data for liquid water samples measured using a Picarro instrument. 
The dataset includes metadata, measured isotopic values, and their deviations from standard references. Below is a detailed explanation of each variable in the dataset.

Variables

    Sample
        Description: The identifier for each water sample.
        Type: String
        Example: M1, H2, L1

    Type
        Description: Classification of the sample based on isotopic composition.
        Type: Categorical (e.g., medium, heavy, light)
        Example: medium, light

    Date
        Description: The date when the sample was analyzed.
        Type: Date (format: YYYY-MM-DD)
        Example: 2023-06-22

    Time
        Description: The time when the sample was analyzed.
        Type: Time (format: HH:MM)
        Example: 07:01

    Picarro
        Description: The model of the Picarro instrument used for analysis.
        Type: String
        Example: L2130-i

    Device
        Description: Identifier or description of the specific device or setup used for the analysis.
        Type: String
        Example: VapAuSa

    d18O.liq
        Description: Measured δ¹⁸O isotopic value in liquid water.
        Type: Numeric
        Unit: ‰ (per mille)
        Example: -7.9978370

    d2H.liq
        Description: Measured δ²H isotopic value in liquid water.
        Type: Numeric
        Unit: ‰ (per mille)
        Example: -55.528355

    std.d18O.liq
        Description: Standard reference δ¹⁸O value used for calibration.
        Type: Numeric
        Unit: ‰ (per mille)
        Example: -9.12

    std.d2H.liq
        Description: Standard reference δ²H value used for calibration.
        Type: Numeric
        Unit: ‰ (per mille)
        Example: -62.15

    diff2H
        Description: Deviation of the measured δ²H value from the standard reference value.
        Type: Numeric
        Unit: ‰ (per mille)
        Formula: diff2H = d2H.liq - std.d2H.liq
        Example: 6.6216447

    diff18O
        Description: Deviation of the measured δ¹⁸O value from the standard reference value.
        Type: Numeric
        Unit: ‰ (per mille)
        Formula: diff18O = d18O.liq - std.d18O.liq
        Example: 1.12216297

Dataset Structure

    Rows: Each row corresponds to a single water sample.
    Columns: Variables as described above.