Stable isotope variations of dew under three different climates.
Chao Tian1,2,3, Kun Du1,3,4,5, Lixin Wang6
1Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.
Scientific Data
|February 15, 2022
Summary
This study presents the first daily dew isotope dataset, including 17O-excess, crucial for understanding evaporation and paleoclimate. The data covers three diverse climates, offering a valuable reference for global dew research.
Area of Science:
- Hydrology
- Isotope Geochemistry
- Paleoclimatology
Background:
- Dew is a vital water source in arid regions, influencing organism survival.
- Traditional isotope analysis lacks comprehensive daily dew records.
- 17O-excess offers a novel tracer for humidity and evaporation processes.
Purpose of the Study:
- To establish the first daily dew isotope dataset (δ2H, δ18O, δ17O, d-excess, 17O-excess).
- To analyze dew isotopes across three distinct climatic regions.
- To provide a reference for studying global dew dynamics and formation.
Main Methods:
- Daily dew collection from July 2014 to April 2018 in desert, Mediterranean, and humid continental climates.
- Simultaneous analysis of δ2H, δ18O, and δ17O using a Triple Water Vapor Isotope Analyzer (Off-Axis Integrated Cavity Output Spectroscopy).
- Calculation of d-excess and 17O-excess from measured isotopes.
Main Results:
- The study generated a unique daily dew isotope dataset from three global locations.
- It provides comprehensive isotopic information (δ2H, δ18O, δ17O, d-excess, 17O-excess) for dew.
- The data captures variations across different climatic conditions.
Conclusions:
- This dataset is the first of its kind, filling a critical gap in dew isotope research.
- It serves as a valuable reference for understanding dew formation and evaporation.
- The findings support the use of 17O-excess in paleoclimate reconstructions and hydrological studies.
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