[Eoas-seminar] MET Seminar - Tuesday February 11 - Dr. Wei-Ting Hsiao (FSU)

[eoas-seminar at lists.fsu.edu]

Dear all,

Please join us for next week’s MET seminar on Tuesday February 11 at 3 PM, which will be given by Dr. Wei-Ting Hsiao<https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsites.google.com%2Fview%2Fweiting-hsiao&data=05%7C02%7Ceoas-seminar%40lists.fsu.edu%7C1636e5782a8b46511cd008dd46ae2c96%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638744436059074361%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=kVrbAgKhf6koxxLNxFbFonEBWFkTekK4FcIMfGthFe8%3D&reserved=0>, who is a postdoctoral scholar here in EOAS. Dr. Hsiao will speak about "Radiative Feedbacks in Tropical Convective Organization and the Madden-Julian Oscillation” (abstract below).

Dr. Hsiao will be presenting his seminar in person in 1044, but a Zoom link is available for those with a medical excuse or approved work off-campus. Please contact Allison Wing (awing at fsu.edu<mailto:awing at fsu.edu>) for the link.

Dr. Hsiao primarily works remotely but is here in Tallahassee until February 21, so please reach out to him (whsiao at fsu.edu<mailto:whsiao at fsu.edu>) if you’d like to schedule a meeting while he is here.

DATE: Tuesday February 11
SEMINAR TIME: 3-4 PM, please join early for refreshments
SEMINAR LOCATION: EOA 1044
SPEAKER: Dr. Wei-Ting Hsiao<https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsites.google.com%2Fview%2Fweiting-hsiao&data=05%7C02%7Ceoas-seminar%40lists.fsu.edu%7C1636e5782a8b46511cd008dd46ae2c96%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638744436059100306%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=TfcVLDCng5xIQUzstsmQKDl%2F6EPLSRZyOAPAz4syLtw%3D&reserved=0>

TITLE: Radiative Feedbacks in Tropical Convective Organization and the Madden-Julian Oscillation

ABSTRACT: The presence of high-altitude anvil clouds produced by tropical deep convection imposes radiative heating on the surface and the atmosphere, which modulates the Earth’s energy budget. These cloud-radiative effects (CREs) were proposed to support the organization of convective systems themselves which produce high clouds. At the same time, we also speculate that convective organization feeds back on modulating the CREs. Such convective-radiative feedback involving the two-way interaction between convective organization and CREs is not well understood. We ask the following questions: What determines the strength of the convective-radiative feedback? And how do the CREs promote convectively coupled variabilities in the observed tropics? The presentation will show our studies attempting to tackle these questions using a set of observation-derived data products, including retrievals using spaceborne satellites, ground-based precipitation radar, and reanalyses.

Our findings suggest that the strength of the radiative feedback changes with space and time, and may be dependent on the organization of convection. Stronger feedback tends to be coupled with a higher degree of mesoscale convective organization, further supported by higher sea surface temperature and stronger low-level wind shear. How radiative feedback helps maintain a dominant mode of tropical intraseasonal variability, the Madden-Julian oscillation, is examined as an example showing how such mesoscale-modulated radiative feedback may have an upscale influence on atmospheric variability at larger scales.


--------------------------------------------
Allison A. 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

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