Publication Abstracts

Blackledge et al. 2019, submitted

Blackledge, B., M. Green, R. Barnes, and M. Way, 2019: Tides on other Earths: Implications for exoplanet and palaeo-tidal simulations. Geophys. Res. Lett., submitted.

A key controller of a planet's rotational evolution, and hence habitability, is tidal dissipation, which on Earth is dominated by the ocean tides. Because exoplanet or deep-time Earth topographies are unknown, a statistical ensemble of the possible tidal dissipation rates on Earth are used to constrain the dissipation. Here, a dedicated tidal model is used together with 120 random continental configurations to simulate Earth's semi-diurnal lunar tide. The results show a possible dissipation range spanning >5 orders of magnitude, between 57MW-19.9TW (1TW=1012W). This compares well with theoretical limits derived from the energetics of Earth's present day oceans. Consequently, continents exert a fundamental control on tidal dissipation rates. Consequently, if plate tectonics are present on a planet it will induce a time-varying dissipation analogous to Earth, which will alter rotational periods over millions of years and further complicate the role of tides for planetary evolution.

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BibTeX Citation

  author={Blackledge, B. and Green, M. and Barnes, R. and Way, M.},
  title={Tides on other Earths: Implications for exoplanet and palaeo-tidal simulations},
  journal={Geophys. Res. Lett.},
  note={Manuscript submitted for publication}

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RIS Citation

ID  - bl06100q
AU  - Blackledge, B.
AU  - Green, M.
AU  - Barnes, R.
AU  - Way, M.
PY  - 2019
TI  - Tides on other Earths: Implications for exoplanet and palaeo-tidal simulations
JA  - Geophys. Res. Lett.
ER  -

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