[Eoas-seminar] MET Seminar - Thursday December 7 - Dr. Clare Singer (Lamont-Doherty Earth Observatory/Boston College)

[eoas-seminar at lists.fsu.edu]

Dear all,

Please join us this Thursday December 7 for the last Meteorology seminar of the semester, given by Dr. Clare Singer<https://urldefense.com/v3/__https://claresinger.github.io__;!!PhOWcWs!3Z_1Oc0JxoCtjMJuorUpXUyUTL3aoHWsDLF5hgabYOnAm7cm7eRRdebXNyvBVgyTo4FkwP9XvKNUizQ1$> of Lamont-Doherty Earth Observatory and Boston College. She will speak about "Stratocumulus-cumulus transitions in present and future climates” (abstract below).

Dr. Singer will be joining us virtually but we will still gather in person in 1044. If you have a medical excuse or approved work off campus, please contact Allison Wing for the Zoom link. Otherwise, we will see you in 1044.

If you are interested in meeting with the speaker via Zoom, please contact Allison Wing (awing at fsu.edu<mailto:awing at fsu.edu>).

DATE: Thursday December 7
SEMINAR TIME: Refreshments at 3 PM, Talk 3:15 - 4:15 PM
SEMINAR LOCATION: EOA 1044 (Speaker remote)
SPEAKER: Dr. Clare Singer<https://urldefense.com/v3/__https://claresinger.github.io__;!!PhOWcWs!3Z_1Oc0JxoCtjMJuorUpXUyUTL3aoHWsDLF5hgabYOnAm7cm7eRRdebXNyvBVgyTo4FkwP9XvKNUizQ1$>

TITLE: Stratocumulus-cumulus transitions in present and future climates

ABSTRACT: Stratocumulus clouds occurring over eastern subtropical ocean basins dominate climatological cloudiness at low latitudes and are important for Earth’s global radiative energy budget. Further west, there is an observed transition to scattered cumulus cloud cover, the so-called stratocumulus-cumulus transition (SCT). To explore the mechanisms driving the SCT, I will present an extension of the traditional bulk boundary layer model for stratocumulus-topped boundary layers that explicitly considers cloud decoupling from the surface and subsequent cloud fraction reduction. I will then use this model to consider cloud decoupling and breakup in response to increased CO2 concentrations in an idealized two-column framework. Finally, I embed this representation of decoupling-induced cloud breakup in CESM2 to explore the direct effect of CO2 on low cloud cover while retaining a realistic representation of the large-scale circulation and thermodynamic state of the free-troposphere. I will show preliminary results from these experiments and discuss the implications of these results for nonlinear cloud feedbacks and direct cloud adjustments.

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Allison Wing, Ph.D.
Werner A. and Shirley B. Baum Professor
Associate Professor, Department of Earth, Ocean and Atmospheric Science
Florida State University
awing at fsu.edu<mailto:awing at fsu.edu>





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