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首页> 外文期刊>Annals Of Geophysics >WRF-Chem modeling of sulfur dioxide emissions from the 2008 Kasatochi Volcano
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WRF-Chem modeling of sulfur dioxide emissions from the 2008 Kasatochi Volcano

机译：WRF-Chem模拟2008年霞乡火山的二氧化硫排放量

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We simulate the dispersion and chemical evolution of the sulfur dioxide (SO 2 ) plume following the eruption of Kasatochi Volcano in Alaska, USA, on August 7 th , 2008 with the Weather Research Forecasting with Chemistry (WRF-Chem) model. The model was initialized with the observed three distinct plumes, which were characterized by a total estimated SO 2 mass of 0.5 to 2.7 Tg. WRF-Chem modeled output was compared to remote sensing retrievals from the Ozone Monitoring Instrument (OMI), and the modeled plumes agreed well in shape and location with the OMI retrievals. The calculated SO 2 column densities showed comparable Dobson Unit values with higher densities especially in the center of the distal plume over northern Canada. We concluded from our analysis that WRF-Chem derived a 9.1-day lifetime of the SO 2 when initialized with a 12km eruption height. Sensitivity tests with varying eruption plume heights revealed significantly in- creased lifetimes of SO 2 up to 17.1 days for higher plumes.?
机译：我们使用化学天气研究预报（WRF-Chem）模型模拟​​了美国阿拉斯加的Kasatochi火山喷发之后二氧化硫（SO 2）羽流的扩散和化学演化。用观察到的三个不同的羽流初始化模型，其特征在于估计的总SO 2质量为0.5至2.7 Tg。将WRF-Chem的模拟输出与来自臭氧监测仪器（OMI）的遥感检索结果进行了比较，并且模拟的烟柱的形状和位置与OMI检索结果非常吻合。计算出的SO 2色谱柱密度显示出可比的Dobson单位值，且密度更高，尤其是在加拿大北部远侧烟羽的中心。从我们的分析中得出的结论是，当喷发高度初始化为12km时，WRF-Chem可以得出9.1天的SO 2寿命。在不同的喷发羽流高度下进行的敏感性测试表明，对于更高的羽流，SO 2的寿命可延长至17.1天。

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