『Abstract
　Many works show the dependence of precipitation δ¹⁸O on altitude and latitude as a result of air temperature change. The assumption that these quantitative relations can hold across a large geographical region can be used to give a rough estimation of local precipitation δ¹⁸O where there is on direct observation of precipitation δ¹⁸O. Although there truly exist uncertainty in the estimation, an effect was made in this paper to establish the precipitation δ¹⁸O pattern over the whole China. Based on regional topography and the δ¹⁸O of meteoric precipitation, this paper established a quantitative relationship between δ¹⁸O in precipitation and latitude and altitude using the existing δ¹⁸O data from 55 sites over china. The model describes as δ¹⁸Oppt = -0.0073LAT2 + 0.3261LAT - 0.0015ALT - 9.7776, and was used to generate a higher-resolution map of mean annual δ¹⁸O for precipitation over China using geographic information system software, integrating with latitude, altitude and the moisture cycle. This determination of the spatial distribution of δ¹⁸O in modern precipitation of China provides important information for ancient climate and stable isotope hydrology studies.

Keywords: δ¹⁸O; Precipitation; Spatial distribution; BW model; China』

1. Introduction
2. Data sources and methods
3. Latitude and altitude dependence of δ¹⁸O in meteoric precipitation
4. Spatial distribution of model residual over China
5. Spatial distribution of δ¹⁸O in precipitation over China
6. Conclusions
Acknowledgements
References