Changes

Indirect and direct [[Methods of detecting exoplanets|observation methods]] such as radial velocity and [[coronagraph]]s can give envelope estimates of exoplanet parameters such as mass, planetary radius, and orbital radius/eccentricity. Since distance from the host star and planetary size are generally believed to influence exoplanet geodynamic regime, inferences can be drawn from such information. For example, an exoplanet close enough to its host star to be [[Tidal locking|tidally locked]] may have drastically different “dark” and “light” side temperatures and correspondingly bipolar geodynamic regimes (see insolation section below).

Indirect and direct [[Methods of detecting exoplanets|observation methods]] such as radial velocity and [[coronagraph]]s can give envelope estimates of exoplanet parameters such as mass, planetary radius, and orbital radius/eccentricity. Since distance from the host star and planetary size are generally believed to influence exoplanet geodynamic regime, inferences can be drawn from such information. For example, an exoplanet close enough to its host star to be [[Tidal locking|tidally locked]] may have drastically different “dark” and “light” side temperatures and correspondingly bipolar geodynamic regimes (see insolation section below).

[[Spectroscopy]] has been used to characterize extrasolar [[gas giants]], but has not yet been used on rocky exoplanets. However, numerical modeling has demonstrated that spectroscopy could detect atmospheric [[sulfur dioxide]] levels as low as 1 ppm; presence of sulfur dioxide at this concentration may be indicative of a planet without surface water with volcanism 1500-80,000 times higher than Earth.<ref name=Kaltenegger_Sasselov_2010>{{cite journal|last1=Kaltenegger|first1=L.|last2=Sasselov|first2=D.|title=DETECTING PLANETARY GEOCHEMICAL CYCLES ON EXOPLANETS: ATMOSPHERIC SIGNATURES AND THE CASE OF SO2|journal=The Astrophysical Journal|date=10 January 2010|volume=708|pages=1162–1167|doi=10.1088/0004-637X/708/2/1162|url=http://iopscience.iop.org/0004-637X/708/2/1162|accessdate=10 October 2014}}</ref>

[[Spectroscopy]] has been used to characterize extrasolar [[gas giants]], but has not yet been used on rocky exoplanets. However, numerical modeling has demonstrated that spectroscopy could detect atmospheric [[sulfur dioxide]] levels as low as 1 ppm; presence of sulfur dioxide at this concentration may be indicative of a planet without surface water with volcanism 1500-80,000 times higher than Earth.<ref name=Kaltenegger_Sasselov_2010> Kaltenegger, L.; Sasselov, D. (10 January 2010). "DETECTING PLANETARY GEOCHEMICAL CYCLES ON EXOPLANETS: ATMOSPHERIC SIGNATURES AND THE CASE OF SO2". The Astrophysical Journal 708: 1162–1167. doi:10.1088/0004-637X/708/2/1162. Retrieved 10 October 2014.</ref>

===Numerical modeling===

===Numerical modeling===