Paper No. 251-2
Presentation Time: 1:15 PM
GEOSPATIAL ANALYSIS OF STABLE ISOTOPIC COMPOSITIONS IN PRECIPITATION OVER THE ARABIAN PENINSULA
Stable deuterium (D) and oxygen-18 (18O) isotopes in precipitation are useful in many applications in hydrology, meteorology, and forensic ecology. Geospatial analysis of annual and monthly amount-weighted means of ∂D and ∂18O in precipitation over the Arabian Peninsula is performed in this work. The input data is the geo-referenced grids of estimated values by the International Atomic Energy Agency (IAEA) new Regionalized Cluster-based Water Isotope Prediction (RCWIP) Model operating on The Global Network of Isotopes in Precipitation (GNIP) database. Grid and latitude-weighted area-averages for amount-weighted means of ∂D and ∂18O were calculated using Geographic Information Systems (GIS) at annual and monthly time scales for the Arabian Peninsula and for each of the seven member states. The results show that there are considerable differences in the grid and latitude-weighted area-averages of the amount-weighted monthly means of ∂D and ∂18O in precipitation over the Arabian Peninsula. Also, significant differences in the grid and latitude-weighted area-averages of the amount-weighted means of ∂D and ∂18O in precipitation are observed among the member states of the Arabian Peninsula at the annual and monthly time scales.