Solar and Human Activity Influence on Electromagnetic Noise in the Polar Regions

太阳和人类活动对极地电磁噪声的影响

• 批准号: 02640328
• 负责人: SATO Natsuo
• 金额: $ 0.96万
• 依托单位: National Institute of Polar Research
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02640328/
• 关键词: Solar Activity; Electromagnetic Noise; ELF; VLF Wave; ULF Wave; HF Wave; Conjugate Point; Anatarctica; Human Activity; HF帯波動; ULF帯波動; 南極の昭和基地; アイスランド; 地磁気共役点; 南極; 日照

Solar and human activity influence on electromagnetic noise were studied using data observed at geomagnetically conjugate stations, Syowa Station in Antarctica and Husafell in Iceland. In order to study the science project, we analyzed statistical characteristics of ELF/VLF (750 Hz, 2 kHz), ULF (0.01-0.1 Hz) and HF (30 MHz) wave intensity. The results are as follows,1. ELF/VLF wave intensity became maximum during daytime and summer season. The intensity was also influenced by solar activity with periodicity of 27 days and 11 years.2. ULF wave intensity showed strong seasonal variation with maximum during winter season. This characteristics mean that ULF waves are dumped in the sunlight ionosphere when it propagates from the magnetosphere to the ground.3. MHz HF waves became maximum during sunlight time and also solar activeperiod. Furthere more, 30 MHz waves intensit, became minimum on Sunday. Sunday is a holyday and human activity may be quiet. That is, we found that human activity influences on HF waves noise in the polar regions.

利用地磁共轭站、南极洲Syowa站和冰岛Husafell站的观测数据，研究了太阳和人类活动对电磁噪声的影响。为了研究该科学项目，我们分析了ELF/VLF（750 Hz，2 kHz）、ULF（0.01-0.1 Hz）和HF（30 MHz）波强度的统计特征。结果表明：1. ELF/VLF波强度在白天和夏季达到最大值。太阳活动也对强度有影响，其周期为27天和11年. ULF波强度具有很强的季节性变化，冬季最大。这一特性意味着超低频波从磁层传播到地面时，会倾倒在太阳光电离层中. MHz高频波在日照时和太阳活动期达到最大值。此外，30兆赫的波强度，成为最低的周日。星期天是一个假日，人们的活动可能会很安静。也就是说，我们发现，人类活动对高频波噪声在极地地区的影响。

项目成果

Yukimatsu,A: "Riometerで観測された30MHz混存の性質" Antarctic Record(南極資料). (1992)

Yukimatsu, A：“用 Riometer 观察到的 30MHz 共存特征”南极记录 (1992)。

Sato, N.: "Solar influence of ELF-VLF emissions obseved at conjugate stations" J. Geophys. Res.96. 11455-11460 (1991)

Sato, N.：“在共轭站观测到的 ELF-VLF 发射的太阳影响”J. Geophys。

Yukimatsu,A: "Riometerで観測された30MHz混信の性質" Antarctic Record(南極資料). (1992)

Yukimatsu, A：“用 Riometer 观察到的 30MHz 干扰的特征”南极记录 (1992)。

Yukimatsu, A.: "Characteristics of 30 MHz interference signals observed by riometers" Antarctic Record. (1992)

Yukimatsu, A.：“测量仪观测到的 30 MHz 干扰信号的特征”南极记录。

Sato,N: "Solar influence of ELF-VLF emissions observed at conjugate stations" Journal of Geophysical Research. 96. 11455-11460 (1991)

Sato,N：“在共轭站观测到的 ELF-VLF 发射的太阳影响”地球物理研究杂志。