%0 Generic %1 lee2019global %A Lee, Sora %A van Putten, Maurice H. P. M. %D 2019 %K atmosphere habitable %R 10.1016/j.newast.2019.04.001 %T Global climate by Rossby number in the Solar system planets %U http://arxiv.org/abs/1905.03626 %X On the largest scales, planetary climates can be described by their Rossby number (Ro). Ro is in response to $Gr/Re^2$ , where Gr is the Grashof number and Re is the Reynolds number. We here simplify $Gr/Re^2$ as h, where $h=H/H_Earth$ with $H=gP/(2V_e)$ for a planet with surface gravity g, rotation period P and equatorial velocity Ve. Unlike h, Ro is difficult to obtain because of a large diversity in observation. We perform on an in-depth literature search on average (av) and maximum (mx) wind velocity for each planet in the Solar system by various observational methods and by altitude. We explore a correlation between Ro and h expressed as a power law with index $\alpha$ based on wind velocities of planets in the Solar system. We obtain a correlation between Ro and h with $\alpha=0.56$ (av) and $\alpha=0.52$ (mx). Earth's $H=H_Earth$ ($h=1$) is primarily due to lunar tidal interaction, given our relatively distant habitable zone (HZ) to the Sun. Our positive correlation, therefore, suggests exoplanet-moon systems as the `go-to-place' in our searches for potentially advanced life in exosolar system.

@misc{lee2019global, abstract = {On the largest scales, planetary climates can be described by their Rossby number (\textit{Ro}). \textit{Ro} is in response to $Gr/Re^2$ , where Gr is the Grashof number and Re is the Reynolds number. We here simplify $Gr/Re^2$ as h, where $h=H/H_{Earth}$ with $H=gP/(2\pi V_e)$ for a planet with surface gravity \textit{g}, rotation period \textit{P} and equatorial velocity V\textsubscript{e}. Unlike \textit{h}, \textit{Ro} is difficult to obtain because of a large diversity in observation. We perform on an in-depth literature search on average (av) and maximum (mx) wind velocity for each planet in the Solar system by various observational methods and by altitude. We explore a correlation between \textit{Ro} and \textit{h} expressed as a power law with index $\alpha$ based on wind velocities of planets in the Solar system. We obtain a correlation between \textit{Ro} and \textit{h} with $\alpha=0.56$ (av) and $\alpha=0.52$ (mx). Earth's $H=H_{Earth}$ ($h=1$) is primarily due to lunar tidal interaction, given our relatively distant habitable zone (HZ) to the Sun. Our positive correlation, therefore, suggests exoplanet-moon systems as the `go-to-place' in our searches for potentially advanced life in exosolar system.}, added-at = {2019-05-11T22:22:20.000+0200}, author = {Lee, Sora and van Putten, Maurice H. P. M.}, biburl = {https://www.bibsonomy.org/bibtex/2f75874c0ef59092ea26492cbcfb5f5aa/ericblackman}, description = {Global climate by Rossby number in the Solar system planets}, doi = {10.1016/j.newast.2019.04.001}, interhash = {6a3be21c73059cdb25ad09fb073df8e4}, intrahash = {f75874c0ef59092ea26492cbcfb5f5aa}, keywords = {atmosphere habitable}, note = {cite arxiv:1905.03626Comment: 2 figs}, timestamp = {2019-05-11T22:22:20.000+0200}, title = {Global climate by Rossby number in the Solar system planets}, url = {http://arxiv.org/abs/1905.03626}, year = 2019 }