SAGE II measurements of early Pinatubo aerosols
SAGE II measurements of early Pinatubo aerosols
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SAGE II 早期皮纳图博气溶胶的测量
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
Robert E. Veiga
中科院分区：
文献类型：
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作者：
M. McCormick;Robert E. Veiga
1991年6月、7月和8月初，SAGE II卫星对平流层中皮纳图博火山喷发云的测量显示，热带地区的气溶胶高度达到29公里，大部分云位于20至25公里之间。在此期间的早期，云层光学厚度最大的部分覆盖了从南纬10°到北纬30°的纬度范围。到7月下旬，在至少北纬70°观测到平流层高光学深度，北纬约30°以北的高值来自20公里以下的气层。观察到两个半球的高压系统与21公里处的火山物质向高南纬的西风急流移动相关，在16公里处与高北纬的情况类似。到8月，由于20公里以上的气层，整个南半球的光学深度相对于7月初增加了10倍。利用SAGE II数据进行的初始质量计算表明，此次火山喷发产生的气溶胶为2000万至3000万吨，远高于埃尔奇琼火山产生的1200万吨。
SAGE II satellite measurements of the Mt. Pinatubo eruption cloud in the stratosphere during June, July, and early August 1991 show that aerosols in the tropics reached as high as 29 km altitude with most of the cloud between 20 and 25 km. The most optically thick portions of the cloud covered latitudes from 10°S to 30°N during the early part of this period. By late July, high stratospheric optical depths were observed to at least 70°N, with the high values north of about 30°N from layers below 20 km. High pressure systems in both hemispheres were observed to be correlated with the movement of volcanic material at 21 km into the westerly jet stream at high southern latitudes and similarly to high northern latitudes at 16 km. By August, the entire Southern Hemisphere had experienced a 10-fold increase in optical depth relative to early July due to layers above 20 km. Initial mass calculations using SAGE II data place the aerosol produced from this eruption at 20 to 30 megatonnes, well above the 12 megatonnes produced by El Chichon.