【摘要】 通过对古里雅冰帽中Ｃａ２＋含量变化的分析揭示：１）古里雅冰帽中的Ｃａ２＋主要来自它周围较近的地表矿物中的可溶性Ｃａ（ＨＣＯ３）２对同一根冰芯而言，Ｃａ２＋含量较高，反映出当时该冰川作用区较干旱，反之则较湿润；３）冰芯中的Ｃａ２＋含量，呈上升状态反映出当时的气候环境往干旱方向发展．而呈下降趋势则有两种可能：一种是气候环境较湿润；另一种是长期或重度干旱造成究竟是何种原因，可结合其它方法，如ＰＨ值、电导率、ＳＯ２－４等进行综合判断得出结论此点对于利用冰芯寻找古气候中的长期或重度干旱的年代尤为重要更多还原

【Abstract】 The following points are revealedfrom analysing the change of Ca2+ within theGuliya ice core :1) Ca2+ within the core mainlycomes from the soluble Ca(HCO3)2 of dust in thevicinity of the ice cap; 2) within an ice core, highercontent of Ca2+ records higher dryness in theglaciated area when it deposited, and vise versa; 3)an increasing content of Ca2+ in ice core records adrying climate. However, for a decreasing contentof Ca2+ there are two possibilities : wet climate andlong-term or serious drought. It is necessary to analyse in combination with other measures, such aspH value, electric conductivity, SO2-4 etc. This isvery important for recognizing a long--term or serious drought recorded in ice core.更多还原