[Eoas-seminar] Meteorology MS Defense for Fucheng Yang, Tuesday, October 27, 2020, 3:30PM, on Zoom 93626378066

[eoas-seminar at lists.fsu.edu]

Meteorology Seminar

Fucheng Yang

M.S. Meteorology Candidate



Title: The Origins of Asymmetry in Mid-latitude Annual Cycle

Major Professor:  Dr. Zhaohua Wu

Date: Tuesday, October 27th, 2020                            Time: 3:30 PM


Location: Zoom Meeting (URL: https://fsu.zoom.us/j/93626378066<https://urldefense.com/v3/__https:/fsu.zoom.us/j/93626378066__;!!Epnw_ITfSMW4!_HZBFbNz_wBsxvARlc67f3kESEmHGJw5tNUv_PvZk5RRwJUPaicRC2avzVzm71bN_Q$>)


ABSTRACT


For almost all climate variables, the annual cycle of a climate variable is often the most dominant component of that variable.  Although such annual cycle is suggested to tie with the annual changes of the solar irradiance arriving at the top of atmosphere, the detailed physical mechanisms causing the annual cycle remain to be worked out.  In this study, we make effort to understand the physical mechanisms behind the observed temporally asymmetric annual cycle of surface air temperature (SAT) over various regions of the Earth.  Since the dominant component of the Fourier decomposition of SAT that causes the temporal asymmetry of SAT is its semiannual component, we seek to understand the origins of the semiannual component.  We found that, in midlatitudes where the semiannual component of the solar irradiance approaches to zero, the semiannual component of SAT is not directly solar irradiance forced; but rather, it is caused by the annual changes of the heat capacity of the effective surface layer in response to the annual cycle of solar irradiance.  We also assess the relative roles of direct forcing and indirect response in generating temporal asymmetry of annual cycle over different regions of the globe.


Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582
To make an appointment please login to my.fsu.edu and choose the Campus Connect (CC) icon

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