Publication Abstracts
Blackledge et al. 2020
Blackledge, B., M. Green, R. Barnes, and , 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={Geophysical Research Letters},
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. JO - Geophysical Research Letters VL - 47 IS - 12 SP - e2019GL085746 DO - 10.1029/2019GL085746 ER -
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