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A perturbed parameter model ensemble to investigate Mt. Pinatubo's 1991 initial sulfur mass emission

机译:一个扰动参数模型集合调查Mt.Pinatubo的1991年初始硫质量排放

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We have performed more than 300 atmospheric simulations of the 1991 Pinatubo eruption using the AER 2-D sulfate aerosol model to optimize the initial sulfur mass injection as a function of altitude, which in previous modeling studies has often been chosen in an ad hoc manner (e.g., by applying a rectangular-shaped emission profile). Our simulations are generated by varying a four-parameter vertical mass distribution, which is determined by a total injection mass and a skew-normal distribution function. Our results suggest that (a) the initial mass loading of the Pinatubo eruption is approximately 14 Mt of SO2; (b) the injection vertical distribution is strongly skewed towards the lower stratosphere, leading to a peak mass sulfur injection at 18-21 km; (c) the injection magnitude and height affect early southward transport of the volcanic clouds as observed by SAGE II.
机译:我们使用AER 2-D硫酸盐气溶胶模型进行了1991年Pinatubo喷发的300多个大气模拟,以优化初始硫质量注射作为高度的函数,这在以前的建模研究中通常以临时方式选择( 例如,通过施加矩形的发射轮廓)。 通过改变四参数垂直质量分布来产生我们的模拟,该垂直质量分布由总喷射质量和偏斜正态分布函数决定。 我们的研究结果表明(a)脊布喷发的初始质量负荷约为SO2的14吨; (b)注射垂直分布朝向较低的平流层倾斜,导致峰值硫磺注射18-21公里; (c)注射幅度和高度影响由Sage II观察到的火山云的早期南部运输。

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