Wanying Kang - VIRTUAL REPEAT

Speaker: 
Wanying Kang
Date: 
Wednesday, April 15, 2020 - 12:00pm to 1:00pm
Location: 
Virtual via Zoom

https://mit.zoom.us/j/245856928

Title and Abstract:

Climate on high obliquity planets

Planets with high obliquity may widely exist in absence of a large moon. This type of planets receive more radiation in the polar regions than in low latitudes, making the equator the coldest region over the globe.

Using a model hierarchy, from a 1D Eady model to a 3D dry dynamic core and then to a full GCM, I aim to understand the atmospheric dynamics on high obliquity planets and address the following questions: 1) whether high obliquity planets are generally warmer or colder than low obliquity equivalents, 2) whether obliquity affects likelihood of water molecules that are evaporated from the surface ocean being detected through spectroscopy, 3) how atmosphere circulates on high obliquity planets, and 4) whether the atmospheric circulation has some potentially observable aspects that can be used to infer the planet’s climate using future observations.

The significance of understanding the climate under different configurations is not merely a curiosity about exoplanets; in fact, these seemingly exotic exoplanet regimes provide an opportunity to test our theories. From this work, we realized that atmospheric motions, even in the tropics, do not necessarily