Joint Seminar: Impact of Microphysics on Tropical Precipitation Extremes in a Global Storm-Resolving Model

The impact of microphysics on tropical precipitation extremes is explored with a global storm-resolving model by modifying the terminal velocity of raindrops. Depending on the time scales, precipitation extremes respond differently. Hourly extremes are influenced dynamically through the microphysical modulation on the convective updraft speed, as a faster terminal velocity of raindrops increases the updraft speed by reducing the total condensates in the atmosphere which increases the updraft buoyancy. However, the response of daily precipitation extremes is more sensitive to the microphysical impact on convective organization. By being more organized with decreasing terminal velocity, daily precipitation extremes are enhanced due to increased precipitation efficiency and intensified updrafts. Thus, the results suggest that microphysics, despite often occurring at small spatial scales, can influence the circulation at larger scales, and the microphysical imprint across different time scales plays an important role in regulating tropical precipitation extremes.

Date

02.11.2021

Time

15:15 h

Place

Bundesstr. 53, room 22/23, virtual seminar
Hamburg

Speaker

Jiawei Bao, MPI-M

Organizers

Diego Jiménez-de-la-Cuesta Otero

Back to listing