摘要
全球降水中氧同位素比率与温度、降水量以及水汽压存在明显的相关关系。相关系数的大小受地理因素和气象条件的制约。中高纬度大陆站的δ￣１８Ｏ与温度和水汽压成正比关系，并且在大陆内部，相关关系变得更加密切；低纬度站的δ￣１８Ｏ与降水量和水汽压成反比关系。δ￣１８Ｏ的分布在一定程度上反映了天气气候的区域性特征。
Oxygen isotope data from 121 stations over the world for the period 1972—1987 havebeen used to investigate its geographical distribution and seasonal variability.It appears that the mean annualδ~18 Ois decreased from low latitudes to high latitudesand varies seasonally．The correlation analysis has shown that a striking positive relationshipexists between temperature and oxygen isotope ratio in the mid－high latitudes especially overthe inland continents． However a inverse correlation is observed between the oxygen isotoperatio and precipitation in the low 1atitudes.
出处
《冰川冻土》
CSCD
北大核心
1994年第3期202-210,共9页
Journal of Glaciology and Geocryology
基金
国家攀登计划和国家自然科学基金
关键词
氧同位素比率
温度
降水
分布特点
：oxygen isotope ratio，correlation，temperature，precipitation，vapor pressure
