Schumann Resonance Measurements for Global Change with Special Emphasis on the TOGA COARE Region

全球变化的舒曼共振测量，特别强调 TOGA COARE 区域

• 批准号: 9217161
• 负责人: Davis Sentman
• 金额: $ 32.99万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-15 至 1997-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9217161&HistoricalAwards=false
• 关键词: Schumann; Resonance; Measurements; Global; Change

The object of this work is the measurement of lightning activity on a global scale through its excitation of the electromagnetic resonances of the global electrical circuit. Local measurements in the tropics have shown that lightning activity is sensitively dependent on the wet bulb temperature of boundary layer air. The PIs propose to make detailed comparisons between Schumann resonance amplitudes and the real distributions of wet bulb temperature and deep tropical convection. Feedback effects of the deep convection in the temperature distributions and subsequent global lightning will be examined. A new station in Peru will compliment two existing ones in California and Western Australia. Comparisons will be made with independent measurements of the ionospheric potential and observations of ionization of the ionosphere. The project will include investigation of possible ELF electromagnetic signatures of upward propagating cloud-ionosphere discharges originating in Amazonian thunderstorms. The practical importance of this research lies in its potential for developing a sensitive index of global change from easily obtainable ground- based measurements of Schumann resonances.

这项工作的目的是通过激发全球电路的电磁谐振来测量全球范围内的闪电活动。 热带地区的本地测量表明，闪电活动敏感地依赖于边界层空气的湿球温度。 PI建议对舒曼共振振幅与湿球温度和深层热带对流的真实分布进行详细比较。 将研究深度对流在温度分布和随后的全球闪电中的反馈效应。 秘鲁的一个新站将补充加利福尼亚州和西澳大利亚州的两个现有站。 将与电离层电势的独立测量和电离层电离的观测进行比较。 该项目将包括对源自亚马逊雷暴的向上传播云电离层放电的可能 ELF 电磁特征进行调查。 这项研究的实际重要性在于它有可能通过易于获得的舒曼共振地面测量来开发全球变化的敏感指数。