Fig6-overview

 

Investigate how the general circulation and equatorial superrotation will change with the atmospheric shortwave absorption.

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High-Obliquity-DaQiSuo.001.png

 

As the meridional circulation turns from thermally indirect to thermally direct with an increasing insolation, upper air zonal wind accelerates westward and cloud fraction drops.

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Fig2-levlat-Q-T.png
Stratospheric specific humidity

The stratosphere is much wetter under high obliquity, allowing water vapor evaporated from the surface ocean to be detected from space.

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Fig1-Ts-insolation

 

Why are high obliquity aquaplanets always warmer than low obliquity equivalents?

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baroclinic-unstable-mode-normal-reverse-gradient

The bottom-amplified baroclinic eddies and thermally-indirect Hadley cell in a world with a reversed meridional temperature gradient, as expected under high obliquity.

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Midlat-jet-response
Zonal wind at 250 mb

 

MJO-like forcings at different longitudinal locations drive the SSWs to different fates: interaction with the mid-latitude jet zonal asymmetry.  read more…

 


Climatology_response_MJO_2D

 

Background zonal asymmetry allows MJO to either enhance or suppress the SSWs

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Climatology_response_MJO

 

Doubling of SSW occurrence and significant warmer & weaker polar vortex due to stronger MJO as expected in a warmer climate.

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