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The continuous real‐time analysis, at 30‐s intervals, of precipitation at an Australian tropical location revealed extreme and rapidly changing δ 18 O and δD values related to variations in moisture source areas, transport paths and precipitation histories. The range of δ 18 O (−19.6‰ to +2.6‰) and δD (−140‰ to +13‰) values from 5948 measurements of nine rain events over 15 days during an 8‐month period at a single location was comparable with the range measured in 1532 monthly samples from all seven Australian Global Network of Isotopes in Precipitation stations from 1962 to 2002. Extreme variations in δ 18 O (−8.7‰ to −19.6‰) and δD (−54‰ to −140‰) were recorded within a single 4‐h period. Real‐time stable isotope monitoring of precipitation at a high temporal resolution enables new and powerful tracer applications in climatology, hydrology, ecophysiology and palaeoclimatology.
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Munksgaard et al. (2012) studied this question.
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