Atmospheric Sciences Seminar

November 6, 3:30pm - 4:30pm
Mānoa Campus, Marine Sciences Building, MSB 100

Two-way interactions between MJO and high-frequency waves over the Maritime Continent in MJOTF/GASS models

Ms. Yan Zhu
Ph.D. Candidate
Department of Atmospheric Sciences, S.O.E.S.T.
University of Hawaii at Manoa

Seminar Date: Wednesday, November 6, 2019
Refreshments: 3:00pm at MSB courtyard
Cookies, Coffee & Tea Provided
Seminar Time: 3:30pm
Location: Marine Sciences Building, MSB 100

Abstract:
The Madden-Julian Oscillation (MJO) is one of the dominant tropical rainfall variabilities at intraseasonal time scale (e.g. 20-100 day). Previous studies have shown that the interaction between the MJO and high frequency waves (HFW) can promote the eastward propagation of the MJO convection and zonal wind. In this talk, I will discuss the two-way interaction between MJO and HFW over the MC region with the MJOTF/GASS models’ data. The models are chosen into good and poor model groups according to their capabilities in simulating the eastward propagation of the MJO convection and flows. The differences of the modulation of the HFW by the MJO, the upscale feedback from the nonlinear rectification of the intraseasonal condensational heating, and the upscale feedback from the eddy momentum transport between the good and poor model groups will be compared. The results exhibit that the variation of the HFW contributes to the eastward propagation of the MJO convection. However, the eastward propagation of MJO zonal wind is mainly related to simulation of the MJO flows.


Event Sponsor
SOEST Atmospheric Sciences, Mānoa Campus

More Information
808-956-8775, SEE FLYER (PDF)

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