The relationship between δ18O in precipitation and climatic factors is analyzed based onthe observation of δ18O in precipitation and meteorological data in the four years from 1992 to 1995 atTuotuohe Meteorological Station, Tibetan Plateau. Almost all the precipitation on the Tibetan Plateauis concentrated on the warm period of the year,while in the dry cold period, there is only a few precipi-tation events. Because the factors affecting δ18O in precipitation is rather complicated and the air tem-perstore does not change too much in the precipitation season,the distribution of δ180 in precipitationwith air temperature is therefore scattered. In this paper, the re1ationship between the aversges of eachmeteorological factor and the corresponding δ18O inprecipittion is analyzed. The analysis resultsindi-cafe that there is an obvious positive correlation between the monthly δ180 and temperature in the 4years; whenever the air temperature increases 1℃,δ180 in precipitation will increase 0.56%. No cor-relation can be observed between relative humidity and δ18O in precipitation. There still can not find anycorrelation between the annual air temperature and annua δl80 in precipitation in the 4 years probablydue to the very short time series of the observation and the little annual air temperature variations.
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