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01.12.2023 / 10:30 - 12:00 / Zeuthen, SR5 | Villa
Astroparticle SeminarTrade Winds and Tropical Precipitation: A Deep Dive into the Intertropical Convergence Zone (ITCZ)
Julia Windmiller
The Earth's weather and climate are governed by three circulation cells. The circulation cell relevant to the tropics is the Hadley cell. Near the surface, the Hadley cell manifests itself in the trade winds. The trade winds meet in the intertropical convergence zone, resulting in ascending air. The ascending air and the associated cloud formation are responsible for the formation of some of the deepest clouds on earth and for about a third of the global precipitation. While the fundamental characteristics of the ITCZ have been known for a considerable time, this region continues to harbour mysteries. Why are climate models still unable to correctly represent the ITCZ? How will the ITCZ - and thus a precipitation pattern that affects the freshwater supply for hundreds of millions of people of the world - change in a warming climate? What processes shape the daily changes in the ITCZ and how do these affect the key properties of the ITCZ? In this talk, I will first give an overview of the well-known outer life of the ITCZ before showing how we peer into the inner life of the ITCZ using atmospheric model simulations and observational data from ship- and airborne measurement campaigns.
More Information: https://indico.desy.de/category/698/
