Abstract
We present precipitation isotope data (δ2H and δ18O values) from 19 stations across the tropics collected from 2012 to 2017 under the Coordinated Research Project F31004 sponsored by the International Atomic Energy Agency. Rainfall samples were collected daily and analysed for stable isotopic ratios of oxygen and hydrogen by participating laboratories following a common analytical framework. We also calculated daily mean stratiform rainfall area fractions around each station over an area of 5° x 5° longitude/latitude based on TRMM/GPM satellite data. Isotope time series, along with information on rainfall amount and stratiform/convective proportions provide a valuable tool for rainfall characterisation and to improve the ability of isotope-enabled Global Circulation Models to predict variability and availability of inputs to fresh water resources across the tropics.
Highlights
Background & SummaryThis database is an outcome of the International Atomic Energy Agency’s (IAEA) coordinated Research Project (CRP) F31004 on ‘Stable isotopes in precipitation and paleoclimatic archives in tropical areas to improve regional hydrological and climatic impact models’
The key objective of the CRP was to improve understanding of the links between stable isotopes in precipitation and the hydroclimatic factors controlling them in tropical regions from daily to annual timescales and site to regional spatial scales
Fst is defined as the average percent of rainfall area covered by stratiform rainfall over the 5° x 5° longitude/latitude box centered over each isotope monitoring station
Summary
Rainfall samples were usually collected at 9am local time but variations of up to a few hours occurred on some occasions for practical reasons
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