摘要
Analyzed results of the atmospheric wind speed and stable isotopic data (d 18O) in summer precipitation at Bangkok, Bombay, New Delhi, Kunming and Lhasa, the IAEA/WMO stations, indicate that d 18O in monsoon pre-cipitation correlate positively to wind speed and that there exists a monsoonal vapor layer over these monsoon- controlled areas during monsoon seasons. The isotopic ex-change happens between monsoon vapors and falling rain-drops in the layer, resulting in this correlation between d 18O and wind speed. This suggests that wind speed is probably one of key factors affecting the d 18O variation besides air temperature and rainfall in the southwest monsoon domain.
Analyzed results of the atmospheric wind speed and stable isotopic data (d 18O) in summer precipitation at Bangkok, Bombay, New Delhi, Kunming and Lhasa, the IAEA/WMO stations, indicate that d 18O in monsoon pre-cipitation correlate positively to wind speed and that there exists a monsoonal vapor layer over these monsoon- controlled areas during monsoon seasons. The isotopic ex-change happens between monsoon vapors and falling rain-drops in the layer, resulting in this correlation between d 18O and wind speed. This suggests that wind speed is probably one of key factors affecting the d 18O variation besides air temperature and rainfall in the southwest monsoon domain.
