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SUMMARY:Stellar absorption aloft shifts meridional heat transport into mid
 dle atmospheres
DTSTART:20261016T020000Z
DTEND:20261016T030000Z
DTSTAMP:20261016T064600Z
UID:indico-event-5359@indico-tdli.sjtu.edu.cn
DESCRIPTION:Speakers: Bowen Fan(樊博闻) (Yale University)\n\nHost: Xian
 yu TanJoin Tencent Meeting：https://meeting.tencent.com/dm/4tufIYWNzxw0Me
 eting ID: 581622017 (no password）\nAbstract:Atmospheric heat transport r
 educes temperature differences between low and high latitudes\, but need n
 ot occur near the surface. On Earth\, surface stellar absorption and evapo
 ration support transport mainly in the troposphere. We test whether strong
  stellar absorption aloft instead favors transport in the middle atmospher
 e\, using Titan climate-model experiments\, Venus climate-model data and a
  Mars reanalysis. On Titan\, the middle atmosphere carries 43% of the pole
 ward heat transport despite containing only 3% of the atmospheric mass. In
 creasing haze shortwave absorption from 0.25x to 4x raises this fraction f
 rom 32% to 60%\, with circulation changes accounting for most of the respo
 nse. On Venus\, 87% of poleward transport occurs within and above the clou
 ds. During two Martian global dust storms\, the middle-atmospheric share o
 f northward transport rises from 10% to 15% and from 16% to 23% relative t
 o matched quiet seasons. These results show how stellar light absorbed alo
 ft with strong latitudinal gradients can sustain substantial heat transpor
 t in a small fraction of atmospheric mass\, separating atmospheric heat re
 distribution on terrestrial planets from surface-driven circulation.\nBiog
 raphy:Dr. Fan received a liberal education at Yuanpei College and earned a
  B.S. in Physics from Peking University\, Ph.D. in Geophysical Sciences at
  the University of Chicago. In 2025\, he joined Yale as a Skinner postdoc.
  He is broadly interested in planetary science and climate science. The in
 tersection of these fields offers rich opportunities to explore physical p
 roblems including fluid dynamics\, radiative transfer\, and phase transiti
 ons. His Ph.D. research focuses on the thermal structure and hydrological 
 cycles of arid planets (e.g.\, early Mars\, Titan) and hot planets (e.g.\,
  early Venus\, early Earth). Beyond his thesis work\, he has contributed t
 o studies on snowball Earth\, lava exoplanets\, and future Mars.\n\nhttps:
 //indico-tdli.sjtu.edu.cn/event/5359/
LOCATION:Tsung-Dao Lee Institute/S4F-SW - Open Area (Tsung-Dao Lee Institu
 te)
URL:https://indico-tdli.sjtu.edu.cn/event/5359/
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