Stable isotopic composition (δ¹⁸O and δD) in Antarctic snow/ice cores serves as the proxy of past temperature. However, the accuracy of temperature reconstruction is largely dependent on the relationship between water isotopes and local temperature (δ-T) derived from present conditions. Thus, it is crucial to quantitatively understand the spatial δ-T relationship and the influencing factors of δ¹⁸O and δD in surface snow besides temperature. In this work, we characterized the spatial and temporal variation of stable isotopes in surface snow using a comprehensive assessment of observations and simulations on the traverse from the coast to Dome A, the summit of East Antarctica ice sheet. The δ¹⁸O and δD from surface snow and snow pit samples show an insignificant variation at interannual scale, possibly suggesting that interannual changes in controlling factors are not remarkable during the investigation period. Along the traverse, the spatial δ¹⁸O-T slope is 0.91‰·^oC⁻¹ based on averages of δ¹⁸O measurements for snow pits and annual mean temperature at the sampling site. Results from the mixed cloud isotope model (MCIM) suggest that the effects of evaporative conditions and transportation paths of moisture on water isotopes for specific sites are insignificant. Therefore, it is more important to consider other effects on water isotopes (e.g. post-depositional processes) when interpreting ice core records, particularly in interior Antarctica.

稳定同位素组成（δ ¹⁸ O和δD）在南极雪/冰核作为过去温度的代理。但是，温度重建的准确性很大程度上取决于水同位素与从当前条件得出的局部温度（δ-T）之间的关系。因此，关键的是要理解定量空间δ-T关系和δ的影响因素¹⁸除了温度O和δD在表面雪。在这项工作中，我们使用对从海岸到南极洲东冰盖的顶峰A的导线的观测和模拟的综合评估，来表征表雪中稳定同位素的时空变化。该δ ¹⁸地表积雪和积雪坑样本的O和δD在年际尺度上显示很小的变化，这可能表明在调查期间，控制因素的年际变化并不明显。沿着横动，空间δ ¹⁸ O-叔斜率为0.91‰· ^ö Ç ^-1基于的δ平均值¹⁸O测量采样点的雪坑和年平均温度。混合云同位素模型（MCIM）的结果表明，蒸发条件和水分传输路径对特定位置的水同位素的影响微不足道。因此，在解释冰芯记录时，尤其是在南极内部，考虑水同位素的其他影响（例如沉积后过程）更为重要。