在chang'E-5和chang'E-6样本中记录的百万年太阳风辐射
Renrui Liu1,2, Xiaoping Zhang3,4, Sizhe Zhao1,2
1State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macau, China.
Nature communications
|October 16, 2025
概括
地球的磁层造成太阳风辐射不对称,影响月球空间气候. 长6的样本在背面显示出更高的边缘生长率,这表明屏蔽效应,但近边异常需要进一步研究.
科学领域:
- 月球地质学和行星科学.
- 太空气候和太阳风的相互作用.
- 地质年代学和样本分析.
背景情况:
- 月球近侧和远侧之间太阳风 (SW) 辐射的不对称性尚不清楚.
- 据推测,地球磁层可以保护月球近面免受SW的影响,从而可能造成辐射不对称.
- 月球上的太空气候变化过程受到南南方向的显著影响.
研究的目的:
- 为了研究地球磁层对月球SW辐射不对称性的长期影响.
- 量化月球近侧和远侧的SW诱导的太空气候变化率.
- 分析辐射不对称对月球表面演变的影响.
主要方法:
- 测量月球土壤粒的曝光年龄和SW诱导的无形边缘厚度.
- 分析来自中国的Chang'E-5 (CE-5) 和Chang'E-6 (CE-6) 任务的样本,以及阿波罗的样本 (11, 16, 17).
- 在不同的月球着陆地点比较边缘生长率.
主要成果:
- 长-6 (前侧) 颗粒的SW诱导无形边缘生长率高于阿波罗 (近侧) 颗粒.
- 观察到的边缘生长速度与模拟的月球表面SW流量保持一致.
- CE-6远侧数据支持地球磁层屏蔽导致近侧SW减小和辐射不对称的假设.
结论:
- 地球磁层可能导致月球SW辐射中持续的半球不对称.
- 在Chang'E-5 (附近) 样本中的意外高边缘生长率表明局部因素也可能影响太空气候变化.
- 需要进一步的研究来阐明CE-5样本中观察到的异常,并充分理解SW辐射不对称性.
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