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http://dx.doi.org/10.5467/JKESS.2019.40.3.203

The Response of Hadley Cell and Jet Stream to Earth's Rotation Rate  

Cho, Chonghyuk (School of physics and astronomy, Seoul National University)
Kim, Seo-Yeon (School of Earth and Environmental Sciences, Seoul National University)
Son, Seok-Woo (School of Earth and Environmental Sciences, Seoul National University)
Publication Information
Journal of the Korean earth science society / v.40, no.3, 2019 , pp. 203-211 More about this Journal
Abstract
The two key factors controlling the atmospheric general circulation are the equator-to-pole temperature difference and the Coriolis force driven by Earth's rotation. Although the former's role has been extensively examined, little has been reported about the latter's effect. To better understand the atmospheric general circulation, this study investigates the responses of Hadley Cell (HC) and westerly jet to the rotation faster or slower than the present Earth's rotation rate. It turns out that the HC edge and jet position tend to move equatorward and become weaker with increasing rotation rate. In most cases, the HC edge is quasi-linearly related with the jet position except for the extremely slow or fast rotating cases. The HC edge is more inversely proportional to the root of rotation rate than the rotation rate in the range of 1/8 to 8 times of the current Earth's rotation rate. However, such a relationship does not appear in the relationship between HC strength and jet intensity. This result highlights that while the latitudinal structure of atmospheric general circulation can be, to some extent, scaled with the Earth's rotation rate, overall intensity cannot be simply explained by the Earth's rotation rate.
Keywords
rotation rate; Hadley cell; jet stream; atmospheric general circulation;
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