en.wikipedia.org/wiki/Schumann_resonances
2 corrections found
No in situ capability exists today to validate the results.
This is outdated. The Huygens probe made in situ ELF measurements in Titan’s atmosphere in January 2005, and those measurements have been used in Schumann-resonance studies.
Full reasoning
The sentence says there was no in situ capability to validate planetary Schumann-resonance modeling, but that was no longer true after ESA's Huygens probe descended through Titan's atmosphere on 14 January 2005.
Two independent sources show this clearly:
- ESA's Huygens science summary says the probe's Permittivity, Wave and Altimetry (PWA) instrument detected an unusual ELF signal around 36 Hz in Titan's atmosphere.
- A later Icarus paper states that its Titan Schumann-resonance model explicitly accounts for observations of electromagnetic waves and atmospheric conductivity measured by the Huygens HASI–PWA instrumentation during the descent.
So while in situ validation remained unavailable for many planets, the blanket statement that "No in situ capability exists today" is incorrect because Huygens had already provided in situ data relevant to Schumann-resonance studies on Titan.
2 sources
- ESA Science & Technology - Science highlights from Huygens: #9. Schumann-like resonances: hints of a subsurface ocean
Although no lightning or thunderstorms were detected in Titan's atmosphere, the PWA did detect an unusual ELF signal at a frequency of around 36 Hertz.
- Analytic theory of Titan’s Schumann resonance: Constraints on ionospheric conductivity and buried water ocean
This study presents an approximate model for the atypical Schumann resonance in Titan’s atmosphere that accounts for the observations of electromagnetic waves and the measurements of atmospheric conductivity performed with the Huygens Atmospheric Structure and Permittivity, Wave and Altimetry (HASI–PWA) instrumentation during the descent of the Huygens Probe through Titan’s atmosphere in January 2005.
There seem to be no works dedicated to Schumann resonances on Saturn. To date there has been only one attempt to model Schumann resonances on Jupiter.
This is outdated. Later papers modeled Schumann resonances for both Jupiter and Saturn, so it is no longer correct to say Saturn had no such studies or that Jupiter had only one.
Full reasoning
This statement was overtaken by later literature.
A 2008 Icarus paper on planetary Schumann resonances says the authors develop models for selected inner planets, gaseous giants and their satellites. The same paper's abstract and index material explicitly describe computing eigenfrequencies and Q-factors for Jupiter and Saturn. That directly contradicts the article's claim that there were no works on Saturn and only one modeling attempt for Jupiter.
In addition, a NASA NTRS preprint from 2012 is specifically about "Schumann Resonance Measurements ... on the Giant Planets", showing that Schumann-resonance research on the giant planets did not stop at a single Jovian model.
So the Wikipedia text is best understood as an outdated snapshot, not an accurate current description of the literature.
3 sources
- The Schumann resonance: A tool for exploring the atmospheric environment and the subsurface of the planets and their satellites
We develop models for selected inner planets, gaseous giants and their satellites, and review the propagation process of ELF electromagnetic waves in their atmospheric cavities...
- The Schumann resonance: A tool for exploring the atmospheric environment and the subsurface of the planets and their satellites
We shall now describe the models and compute the eigenfrequencies and Q-factors for Venus; Earth; Mars; Jupiter and Saturn; Titan, Europa and Io; Uranus and Neptune.
- Using Schumann Resonance Measurements for Constraining the Water Abundance on the Giant Planets - Implications for the Solar System Formation
In this work, we propose a new, remote sensing technique to infer the outer planets water content by measuring ... Schumann resonances ... in their gaseous envelopes.