Publication Abstracts

Blackledge et al. 2020

Blackledge, B., M. Green, R. Barnes, and M. Way, 2020: Tides on other Earths: Implications for exoplanet and palaeo-tidal simulations. Geophys. Res. Lett., 47, no. 12, e2019GL085746, doi:10.1029/2019GL085746.

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 is used to constrain possible tidal dissipation rates on an Earth-like planet. 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 ocean tidal dissipation range spanning 3 orders of magnitude, between 2.3GW-1.9TW (1TW=1012W). When model resolution is considered, this compares well with theoretical limits derived for the energetics of Earth's present day deep ocean. Consequently, continents exert a fundamental control on tidal dissipation rates and we suggest that plate tectonics on a planet will induce a time-varying dissipation analogous to Earth's. This will alter rotational periods over millions of years and further complicate the role of tides for planetary evolution.

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BibTeX Citation

@article{bl06100q,
  author={Blackledge, B. and Green, M. and Barnes, R. and Way, M.},
  title={Tides on other Earths: Implications for exoplanet and palaeo-tidal simulations},
  year={2020},
  journal={Geophys. Res. Lett.},
  volume={47},
  number={12},
  pages={e2019GL085746},
  doi={10.1029/2019GL085746},
}

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RIS Citation

TY  - JOUR
ID  - bl06100q
AU  - Blackledge, B.
AU  - Green, M.
AU  - Barnes, R.
AU  - Way, M.
PY  - 2020
TI  - Tides on other Earths: Implications for exoplanet and palaeo-tidal simulations
JA  - Geophys. Res. Lett.
VL  - 47
IS  - 12
SP  - e2019GL085746
DO  - 10.1029/2019GL085746
ER  -

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