Climatic factors controlling chemical and isotopic characteristics of precipitation in Syria

摘要: The chemical and isotopic composition of monthly composite rain samples collected at 13 meteoric stations in Syria during two hydrological cycles from 1991 to 1993 have been measured. analysis the revealed a number pollution due industry sand storms. temporal spatial variation has found be comparable with one neighbouring countries such as Jordan others. average weighted oxygen-18 deuterium values are − 7·5 39·11‰, respectively, excess is 21‰ . individual isotope can divided into groups. One group represented by winter precipitation fits closely Mediterranean Meteorological Water Line (MMWL). Thus, for precipitation, condensation water vapour appears dominating fractionation process. other represents spring spread along an evaporation line below MMWL, thus indicating influence sub-cloud evaporation. d-excess lower north (19·9‰ Tartous, 18·1‰ Jarablous) than south country (23·4‰ Sweida, 24·1‰ Izra) where air mass dominates. also close value eastern basin 22‰ , e.g. 23‰ which signifies that is, all these countries, dominant source precipitation. tritium content was increase distance coast (5·3 TU coastal station 8·8 continental Palmyra). Low high clearly indicate moisture source. Copyright © 2010 John Wiley & Sons, Ltd.