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SUMMARY:SPC Seminar – Climate – Robert Pincus (Columbia)
DESCRIPTION:Guest Speaker: Robert Pincus (Columbia)\nTitle: The Kodachrome 
 revolution- the roots of a colder stratosphere\, more rain\, and cloud fee
 dbacks with increasing CO2\nAbstract: The combination of deep understandin
 g of the physics controlling the flow of radiation though the atmosphere\,
  increasingly detailed characterization of atmospheric state\,  and rapid
 ly-expanding computational capabilities\, has enabled ever-more-accurate c
 alculations of radiation balance over the last decades. These computations
  underlie many of our expectations about the future including stratospheri
 c cooling in response to increasing CO2 levels and more precipitation from
  a warming atmosphere… but they don’t tell us why these phenomena emer
 ge. I will describe how the three key idealizations underlying the Kodachr
 ome revolution – of spectroscopy\, of radiative transfer\, and of constr
 aints imposed by the condensability of water vapor – are driving rapid p
 rogress in understanding of a wide range of behavior. I’ll show how the 
 enormous spectral variation of absorption by water vapor and carbon dioxid
 e are responsible  a) for the cooling of the stratosphere and the resulti
 ng increase in top-of-atmosphere imbalance as CO2 concentrations are incre
 ased\; b) for the increased precipitation that occurs as the atmosphere wa
 rms\; and c) for the surprising influence of water vapor and carbon dioxid
 e on the radiation budget in fully cloudy skies.
URL:https://www.imperial.ac.uk/events/200233/spc-seminar-climate-robert-pin
 cus-columbia/
DTSTART;TZID=Europe/London:20251015T160000
DTEND;TZID=Europe/London:20251015T170000
LOCATION:630\, Blackett Building\, South Kensington Campus\, Imperial Colle
 ge London\, London\, SW7 2AZ\, United Kingdom
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