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1991年 6月菲律宾皮纳图博火山喷发 ,导致大气圈火山灰气溶胶含量激增 ,连同 1 991年 8月智利哈德森火山喷发释放的火山灰一道 ,导致自 1 991年 1 2月起南极点降水中SO2 -4开始增加 .激光雷达同时也观测到富含火山微尘气团的到达 .雪样中火山微粒的电镜分析结果 ,以及据物质平衡观测值估算的年代等表明 ,1 994年 1 2月在南极点 0 .1～ 0 .9m雪层中可将 2次火山喷发事件区别开来 ,估算出南极点处皮纳图博火山和哈德森火山SO2 -4 的净通量分别为 ( 1 0 .9± 1 .1 )和 ( 3.2± 1 .1 )kg·km-2 .南半球中、高纬度地区的火山喷发在南极雪冰中的信号大于低纬地区火山的影响 ,这一方法可用来推算冰芯记录的古火山活动的量级和规模 .
The eruption of the Pinatubo volcano in the Philippines in June 1991 led to a surge in volcanic ash aerosol content in the atmosphere, along with volcanic ash emanating from the Hudson volcano in Chile in August 1991, resulting in the onset of precipitation in the Antarctic since January 1991 SO2 -4 began to increase.Lidar radar also observed the arrival of volcanic dust-rich air masses.The results of electron microscopy analysis of volcanic particles in snow samples and the estimated age based on mass balance observations show that in January 1994, Two volcanic eruptions can be distinguished in the 0-1 .9 m snow layer of the Antarctic. The net flux of SO2 -4 at Mount Pinatubo and Hudson volcanoes at the South Pole is estimated to be (1 0 .9 ± 1 .1) and (3.2 ± 1. 1) kg · km-2. The signal of volcanic eruptions in the Antarctic ice-snow in the middle and high latitudes in the southern hemisphere is greater than the volcanic impact in the low latitudes, and this method is available To calculate the magnitude and scale of ancient volcanic activity recorded by ice core.