Numerical simulation of squall line by using detailed microphysics

Geresdi, István; Gregory, Thompson; Sarkadi, Noémi [Sarkadi, Noémi (PhD Természettudo...), szerző]

Angol nyelvű Tudományos
Megjelent: 2013
Konferencia: Numerical simulation of squall line by using detailed microphysics 2013-06-03 [Helsinki, Finnország]
    Azonosítók
    There is a strong interaction between the dynamics and microphysics occurs in the squall lines. The evaporation of the water drops near to the surface affects the intensity of the cold pool and the low-level wind shear. Numerical experiments prove that appropriate simulation of the melting process is crucial for the correct simulation of cooling due to the evaporation of the water drops. Most of the numerical models suppose that the melted water immediately sheds off the surface of the melting snow flakes and graupel particles. There are numbers of evidences based on laboratory observations, which show that the shedding of melted water from the surface of solid precipitation elements occurs only in the case of graupel particles larger than about 1 cm. Our studies show that the artificial increase of the number concentration of small water drops due to the continuous shedding results in overestimation of cooling rate due to the evaporation. Two-dimensional versions of WRF with both detailed and bulk scheme are used to investigate the sensitivity of cold pool formation on the applied microphysical description.
    Hivatkozás stílusok: IEEEACMAPAChicagoHarvardCSL
    2019-09-19 00:18