零平衡线

SDS断面1991／1992年度物质平衡差额为163mm，零平衡线海拔高度为140m，比动力平衡线低20m。

Mass balance at SDS section in 1991 / 1992 was a weak positive balance year with a mass balance difference of 163 mm , altitude of equilibrium line was 140m , which was 20m lower than that of dynamic equilibrium line .

祁连山中段夏季（6&8月）平均气温以1986年为转折年，后18年较前11年平均下降1℃，零平衡线下降88m。

The average summer ( from June to August ) air temperature is 1 ℃ lower and zero-equilibrium line 88 m lower in the 18 years after 1968 than that in the 11 years before 1968 in the middle part of Qilian Mountains .

冰川零平衡线处的物质平衡及其应用

Mass Balance at the Steady State Equilibrium Line Altitude and its Application

到近两年亏损强烈，为所有观测资料中负平衡值最大的年份，零平衡线也达到最高位置。

Now the equilibrium line of the glacier has reached the highest altitude since the glacier has been observed .