A robust empirical relationship between speed and turbulence energy in the near-Earth solar wind
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915930844430336 |
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| author | Chhiber, Rohit Wang, Yanwen Cuesta, Manuel E. Wang, Jiaming Roy, Sohom |
| author_facet | Chhiber, Rohit Wang, Yanwen Cuesta, Manuel E. Wang, Jiaming Roy, Sohom |
| contents | The connection between turbulence and solar-wind acceleration, long known in space physics, is further developed in this Letter by establishing a robust empirical law that relates the bulk-flow speed to the magnetohydrodynamic-scale fluctuation energy in the plasma. The model is based on analysis of twenty-five years of near-Earth observations by NASA's Advanced Composition Explorer. It provides a simple way to estimate turbulence energy from low-resolution speed data -- a practical approach that may be of utility when high-resolution measurements or advanced turbulence models are unavailable. Potential heliospheric applications include space-weather forecasting operations, remote imaging datasets, and energetic-particle transport models that require turbulence amplitudes to specify diffusion parameters. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2512_00983 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A robust empirical relationship between speed and turbulence energy in the near-Earth solar wind Chhiber, Rohit Wang, Yanwen Cuesta, Manuel E. Wang, Jiaming Roy, Sohom Space Physics Solar and Stellar Astrophysics The connection between turbulence and solar-wind acceleration, long known in space physics, is further developed in this Letter by establishing a robust empirical law that relates the bulk-flow speed to the magnetohydrodynamic-scale fluctuation energy in the plasma. The model is based on analysis of twenty-five years of near-Earth observations by NASA's Advanced Composition Explorer. It provides a simple way to estimate turbulence energy from low-resolution speed data -- a practical approach that may be of utility when high-resolution measurements or advanced turbulence models are unavailable. Potential heliospheric applications include space-weather forecasting operations, remote imaging datasets, and energetic-particle transport models that require turbulence amplitudes to specify diffusion parameters. |
| title | A robust empirical relationship between speed and turbulence energy in the near-Earth solar wind |
| topic | Space Physics Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2512.00983 |