EAGER Collaborative Research: Testing a new sensor for short term and long term measurement of heat flow in lakes

EAGER 协作研究：测试用于短期和长期测量湖泊热流的新传感器

• 批准号: 2041412
• 负责人: Matthew Hornbach
• 金额: $ 1.84万
• 依托单位: Southern Methodist University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2041412&HistoricalAwards=false
• 关键词: EAGER; Collaborative; Research; Testing; new

This project will develop a new probe to measure the amount of heat coming out of the ground beneath lakes. The probe will overcome current limitations by (1) enabling visual site selection so that researchers know where and how the probe is placed in the lake floor environment and pin-point important lake floor features such as gas seeps and chemosynthetic communities, (2) providing real-time data to assess data quality and site evaluation, and (3) monitoring temperature changes over time that might arise from changes in lake temperature. The probe will be deployed and tested in Mono Lake, California. Mono Lake has hosted the youngest volcanic eruptions in the region. There are, however, currently no heat flow measurements within the lake to constrain recent volcanic activity and volcanic hazards. The measurements may reveal the extent of magma bodies that connect the subsurface to the volcanic eruptions seen at Earth’s surface. This project will be integrated into a summer field camp so that 20 students can participate in the measurement campaign and data interpretation. This project provides an opportunity to test new instrumentation that would be useful in a broad range of settings. The prototype geophysical probe, called the LTMP (Lake Thermal Monitoring Probe) consists of a compact (1-3 m long), lightweight (20 kg), camera-mounted Lister-type heat flow probe designed for deployment by only two people on a small (~5 m) vessel in a lake bottom. The probe will be designed to provide both real-time lake floor video for site selection, and real-time subsurface temperature monitoring for up to one year, with data continuously beamed back to researchers. If the new probe works, it will provide a new high-resolution tool for measuring heat flow and fluid flow changes in complex geologic settings like caldera lakes, revealing how heat flow below lakes is coupled to other geosystems and hazards (e.g., the atmosphere, groundwater, volcanoes, earthquakes).This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目将开发一种新的探测器来测量湖泊地下冒出的热量。探测器将通过以下方式克服目前的限制：(1)实现可视地点选择，以便研究人员了解探测器放置在湖底环境中的位置和方式，并准确地指出重要的湖底特征，如气体渗漏和化学合成群落；(2)提供实时数据，以评估数据质量和地点评估；以及(3)监测可能因湖温变化而引起的温度随时间的变化。探测器将在加利福尼亚州的莫诺湖部署和测试。莫诺湖是该地区最年轻的火山喷发的所在地。然而，目前还没有湖内的热流测量来限制最近的火山活动和火山灾害。这些测量可能会揭示连接地下和地球表面火山喷发的岩浆体的范围。该项目将融入夏令营，让20名学生参与测量活动和数据解读。该项目提供了测试新仪器的机会，这些仪器将在广泛的环境中有用。原型地球物理探头，称为LTMP(湖泊热监测探头)，由一个紧凑(1-3米长)、轻便(20公斤)、安装在相机上的列斯特型热流探头组成，设计用于在湖底的一艘小(~5米)船只上仅由两个人部署。该探测器将为选址提供实时湖底视频，并提供长达一年的实时地下温度监测，并将数据连续传回研究人员。如果新的探测器成功，它将提供一个新的高分辨率工具，用于测量复杂地质环境中的热流和流体流动变化，如破火山口湖泊，揭示湖泊下的热流如何与其他地球系统和灾害(例如，大气、地下水、火山、地震)相耦合。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。