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对 1996～ 1997年中国首次南极内陆冰盖考察获得的南极洲伊利莎白公主地区 2个雪坑及 5 0m雪芯样品的阴离子、阳离子和δ18O进行对比分析 ,结果表明 ,在浅层雪坑内 ,Cl-和Na+的浓度变化与δ18O的变化异相 ;NO-3 的浓度变化和δ18O的变化同相 .这些变化呈现明显的季节波动 ,反映出良好的年层效应 .随着深度的增加 ,δ18O的年层效应在 3m左右 (约 10a)逐渐被平滑 ;Cl-,NO-3 和Na+则在 5 0m雪芯范围内 (约 2 5 0a)保持了较清晰的季节变化层 ,这为本区冰盖时间序列的建立提供了重要依据 .与此相反的是 ,无论在雪坑内还是在雪芯中 ,陆盐离子Ca2 +均不具有明显的年层效应 .
The comparative analysis of the anions, cations and δ18O between two snow pits in the Princess Elizabeth area of Antarctica and the 50m snow core samples obtained from the first inland ice cover survey in China from 1996 to 1997 showed that in the shallow snow pits, The change of concentration of Cl- and Na + is out of phase with the change of δ18O. The change of concentration of NO-3 is in phase with the change of δ18O. These changes show obvious seasonal fluctuation and good annual layer effect. With the increase of depth, The annual layer effect is gradually smoothed in about 3 m (about 10 years). Cl-, NO-3 and Na + keep a clear seasonal change layer in the core range of 50 m (about 250 years) In contrast, Ca2 +, a salt of salt, has no significant layer-by-layer effect in both snow pits and snow cores.