Ulli Seibt

Upcoming Seminar

Nicholas Lutsko (MIT), Extending Large-Scale Dynamics From the Zonal-Mean to Regional Climates

Wed, Oct 16, 2019

MS 7124

Our understanding of the large-scale dynamics of the climate system is typically developed in idealized, zonally-symmetric settings, and it is often unclear how to extend this understanding to the regional-scales on which we live. In this talk I will give two examples of how ideas originally developed in zonal-mean contexts can be applied to regional climates. First, I will discuss the impact of large-scale orography in the Northern Hemisphere on winter synoptic temperature variance. By combining recent ideas on what controls zonal-mean temperature variance with established stationary wave theory, I will demonstrate that the presence of the Rockies on the western edge of North America increases North American temperature variance, while the presence of the Tibetan Plateau and the Himalayas on the eastern edge of the Eurasian continent damps temperature variance over most of Eurasia. Second, I will discuss how the energetics-based perspective on the Intertropical Convergence Zone (ITCZ) can be used to understand the Indian Ocean’s role in controlling the strength and timing of the summer South Asian monsoon. In the zonal-mean, energetic arguments suggest that ocean heat transport damps meridional shifts of the ITCZ, but I will show that, on a regional scale, ocean heat transport simultaneously amplifies and damps different aspects of the South Asian monsoon.

Ulli Seibt

Specialty: Terrestrial biogeochemistry, biosphere-atmosphere interactions

Notes: Diploma, Max Planck Institute for Meteorology, Hamburg,
and University of Tübingen, Germany
Ph.D., Max Planck Institute for Biogeochemistry, Jena,
and University of Hamburg, Germany

ulli [at] atmos.ucla.edu

Associate Professor

MSA 7975

https://sites.google.com/site/useibt/

Atmospheric and Oceanic Sciences

61°

Clear

Campus Address

Mailing Address

Contact Information

Campus Address	Mailing Address	Contact Information
520 Portola Plaza	UCLA Atmospheric & Oceanic Sciences	Students Services Office: (310) 825-1954
Math Sciences Building 7127	Box 951565	Email: studentinfo@atmos.ucla.edu
Los Angeles, CA 90095	Los Angeles, CA 90095-1565	Phone: (310) 825-1217