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首页> 外文期刊>Earth, planets and space: EPS >Continuous thermal monitoring of the 2008 eruptions at Showa crater of Sakurajima volcano, Japan
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Continuous thermal monitoring of the 2008 eruptions at Showa crater of Sakurajima volcano, Japan

机译：日本樱岛火山昭和火山口2008年喷发的连续热监测

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An infrared thermal monitoring system installed 3.5 km from the Showa crater of Sakurajima volcano, Japan, enabled the capture of continuous thermal waveform data at 1 Hz during two recent episodes of eruptive activity. The eruptions were characterized by a sudden increase in volcanic cloud temperature in the first 2-5 s, followed by gradual cooling over a few minutes. The maximum cloud temperature varied widely between individual events with a range of more than 180°C. A positive relation between the maximum temperature and the exit velocity of the cloud has also been established. At higher temperatures and faster exit velocities of the volcanic cloud, the eruptions tend to be accompanied by pyroclastic density currents. However, no strong correlation was observed in a 6-month period of 2008 between temporal changes in surface manifestation of eruptive activity and the change of cloud temperatures. Identification of factors that control such observed apparent temperatures of volcanic cloud would lead to a better understanding of the thermodynamics of the eruption itself.
机译：红外热监测系统安装在距离日本樱岛火山昭和火山口3.5公里处，可在最近两次爆发活动中捕获1 Hz的连续热波形数据。爆发的特征是在最初的2-5秒内火山云温度突然升高，然后在几分钟内逐渐冷却。各个事件之间的最高云温变化很大，范围超过180°C。最高温度和云的出口速度之间也建立了正关系。在更高的温度和更快的火山云出口速度下，火山喷发往往伴有火山碎屑密度流。但是，在2008年的6个月中，未观测到喷发活动表面表现的时间变化与云温度变化之间的强相关性。确定控制这种观察到的火山云表观温度的因素将有助于对喷发本身的热力学有更好的了解。

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