Toms and Avhrr Observations of Drifting Volcanic Clouds from the August 1991 Eruptions of Cerro Hudson
Toms and Avhrr Observations of Drifting Volcanic Clouds from the August 1991 Eruptions of Cerro Hudson
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Toms 和 Avhrr 对 1991 年 8 月哈德逊山喷发后的漂移火山云的观测
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发表时间：
2013
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影响因子：
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通讯作者：
W. Rose
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作者：
E. Constantine;G. Bluth;W. Rose
用红外高级甚高分辨率辐射计（AVHRR）和紫外臭氧总量测绘光谱仪（TOMS）对1991年8月Cerro哈德逊5三次喷发的细火山灰（1-15 μm）和二氧化硫气体云进行了测量。TOMS数据显示，8月8日的第一次喷发释放了700 kT的SO 2，8月12日的第二次喷发产生了约600 kT的SO 2，8月15日的第三次喷发释放了约2700 kT的SO 2。在第三次喷发后，SO 2和火山灰似乎已经分离，火山灰位于对流层顶附近的较低水平，并在几天内损失了90%的质量，而SO 2则位于平流层，在第一周内仅损失了三分之二的质量。8月19日至20日，火山云的一部分飘过澳大利亚，TOMS和AVHRR都对它进行了表征;由于这片云是航空业的重要关注点，它为卫星长期云探测提供了一个成功的测试。
Clouds of fine volcanic ash (1-15 μm) and sulfur dioxide gas from Cerro Hudson 5 three August 1991 eruptions were measured with the infrared advanced very high resolution radiometer (AVHRR) and the ultraviolet total ozone mapping spectrometer (TOMS). TOMS data show that the first eruption released 700 kT SO 2 on August 8, a second eruption on August 12 produced about 600 kT, and the third on August 15 released about 2700 kT SO 2 . Following the third eruption, the SO 2 and ash appear to have separated, with the ash residing at lower levels near the tropopause and losing 90% of its mass within a few days, while the SO 2 was stratospheric, losing only two-thirds of its mass over the first week. A fragment of the volcanic cloud drifted across Australia on August 19-20 where it was characterized by both TOMS and AVHRR; because this cloud was a significant concern to aviation, it offers a successful test of long-term cloud detection by satellites.