UniversitätAktuelles & PresseVeranstaltungen
Application of PALM to Geophysical Turbulence and its Parameterization - from Ocean Mixing to Cloud Microphysics.
19 Mai
19. Mai 2022
Meteorologisches Kolloquium

Application of PALM to Geophysical Turbulence and its Parameterization - from Ocean Mixing to Cloud Microphysics.

This summer semester, public lectures will again be held as part of the Meteorological Colloquium. There is a wide variety of research fields offered. Everyone is welcome to join us at 16:15 on the Thursdays mentioned on our website (see weblink below). The lectures are also suitable for meteorology students and other enthusiasts.

Abstract:

Two important applications of LES/PALM are discussed; one for the parameterization of turbulent mixing and the other for particle-laden flows. Contrary to observation data, LES not only allows us to examine the performance of a parameterization under all ideal conditions but also allows us to examine the hypotheses used in the parameterization. LES of the ocean mixed layer was used to investigate how Langmuir circulation and wave breaking affect vertical mixing and how the Coriolis force affects seasonal thermocline formation and convective deepening. It leads to the development of a new ocean mixed layer model. Furthermore, LES was used to optimize various empirical constants in the model via the inverse method. A new PBL model, the YSU scheme used in WRF, was also developed based on the analysis of LES data. On the other hand, LES allows us to investigate the motion of Lagrangian particles in realistic turbulent flows simulated by LES, thereby overcoming the problems of existing Eulerian models. A Lagrangian cloud model was used to investigate the processes of nucleation and raindrop formation by tracking the growth of Lagrangian particles. It also leads to the development of a new parameterization of cloud microphysics. Similarly, the Lagrangian plankton model was used to investigate spring bloom by tracking the growth of Lagrangian particles.

Referent/Referentin

Prof. Dr. Yign Noh, Yonsei University, Seoul, Korea

Veranstalter

Institut für Meteorologie und Klimatologie

Termin

19. Mai 2022
16:15 Uhr - 17:30 Uhr

Kontakt

Alexandra Westbrink
Institut für Meteorologie und Klimatologie
Herrenhäuserstraße 2
30419 Hannover
westbrink@meteo.uni-hannover.de

Ort

4107
Geb.: 4107
Kirchenkanzlei
Herrenhäuserstraße 2A
30419 Hannover
Standort anzeigen

Weblink