An Equipment Proposal: Volcanic Conduit Dynamics Observed Through Forward Looking Infrared Radiometry

设备提案：通过前视红外辐射测量观察火山管道动力学

• 批准号: 0324640
• 负责人: Jonathan Dehn
• 金额: $ 3.57万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-15 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0324640&HistoricalAwards=false
• 关键词: Equipment; Proposal; Volcanic; Conduit; Dynamics

0324640DehnArguably the most important variable in the modeling of volcanic processes is temperature. The variability of temperature in real volcanic systems exceeds 1000 degrees, crossing the vapor, liquid and solidus phases of the host and volcanic materials. Thus, large changes in temperature affect changes in the dynamics of volcanic systems. It is exceedingly difficult to scale such temperature changes in the laboratory, and thus many volcanologists take to the field as their lab to understand the processes that control eruptions. Until recently, for accurate temperature measurements, researchers were limited to thermocouples, optical pyrometry, or simple spot radiometers, delivering the temperature of a single target. The forward looking infrared radiometer (FLIR) provides a complete image, with accurate temperatures at every pixel. This provides a spatial dimension to the data which has been previously unavailable. This new dimension in the FLIR data provides a framework to link diverse geophysical data sets. This grant support the acquisition of two handheld FLIR systems by the Geophysical Institute at the University of Alaska. These systems will be used to study heat transfer processes from recent lavas flows at volcanoes worldwide but will primarily be focused on study of numerous active Aleutian arc volcanoes and the Kilauea hot spot volcano in Hawaii. The systems will support basic research on radiative transfer and lava dynamics and eruption types, volcanic hazard assessment and graduate student education in volcanology. The availability of the two FLIR systems, where collaborative efforts allow, can be linked to provide stereo imagery useful to measure erupted gas and lava volumes not possible with a single unit.***

0324640德恩可以说，在火山过程建模中最重要的变量是温度。 在真实的火山系统中，温度的变化超过1000度，跨越寄主和火山物质的汽相、液相和固相。 因此，温度的巨大变化会影响火山系统动力学的变化。 在实验室里测量这种温度变化是非常困难的，因此许多火山学家把野外作为他们的实验室，以了解控制火山爆发的过程。 直到最近，对于精确的温度测量，研究人员仅限于热电偶，光学高温计或简单的点辐射计，提供单个目标的温度。 前视红外辐射计（FLIR）提供了一个完整的图像，每个像素都有准确的温度。 这为以前无法获得的数据提供了空间维度。 前视红外数据中的这一新的维度提供了一个框架，将不同的地球物理数据集联系起来。 这笔赠款支持阿拉斯加大学地球物理研究所购买两套手持前视红外系统。 这些系统将用于研究世界各地火山最近熔岩流的热传递过程，但将主要侧重于研究许多活跃的阿留申弧火山和夏威夷的基拉韦厄热点火山。 这些系统将支持关于辐射转移、熔岩动力学和喷发类型的基础研究、火山危险评估和火山学研究生教育。 在合作努力允许的情况下，两个前视红外系统的可用性可以连接起来，以提供有用的立体图像，用于测量喷发的气体和熔岩体积，而这是单个单元无法实现的。