High‐frequency field‐deployable isotope analyzer for hydrological applications

摘要: [1] A high-frequency, field-deployable liquid water isotope analyzer was developed that is capable of quantifying δ18O and δ2H to better than ±0.17 ±0.32‰, respectively, on over 90 samples/d. The instrument deployed for 4 contiguous weeks in the H. J. Andrews Experimental Forest Long-term Ecological Research site western Oregon, where it used real-time measurement ratios precipitation stream during three large storm events. We were able document fine-scale changes rainfall composition damping effects channel continuously through these periods. also performed a rain-on-snow experiment we sampled leachate from melting snow core at 2 min intervals 5 h. These data show remarkable patterns internal rain-snow mixing, would not have been detected without such high-frequency sampling. two preliminary applications proof concept new field analyzer, device will ultimately provide hydrologists with insight into flow dynamics unprecedented frequency long time scales.