On the reasons for the DSD broadening in bin-microphysics large eddy simulations

• Grant number: 19/06988-4
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: April 28, 2019
• End date: October 01, 2019
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Meteorology
• Principal Investigator: Luiz Augusto Toledo Machado
• Grantee: Lianet Hernández Pardo
• Supervisor: Hugh Morrison
• Host Institution: Instituto Nacional de Pesquisas Espaciais (INPE). Ministério da Ciência, Tecnologia e Inovação (Brasil). São José dos Campos , SP, Brazil
• Institution abroad: National Center for Atmospheric Research (NCAR), United States
• Associated to the scholarship: 16/24562-6 - Combining observations and numerical modeling to improve the description of thunderstorm microphysical processes, BP.DR

Abstract

Droplet size distributions (DSDs) determine many characteristics of clouds, such as the onset of precipitation and cloud glaciation, and also influence the effect of clouds on radiation. During the proposed Research Internship Abroad, we intend to analyze the effects of turbulence on the evolution of DSDs in Large Eddy Simulations (LES) with bin microphysics, thus studying the reasons for DSD broadening in real clouds and deepening our ideas about improving the representation of the Gamma parameters on bulk parameterizations. It would provide a more complete characterization of warm phase processes in the Gamma phase space. This research would involve LES using WRF with explicit microphysics as well as comparisons with WRF simulations using bulk microphysics schemes. The simulations would allow us to study the behavior of DSDs in idealized growing cumulus using 2D and 3D turbulent warm bubble cases in WRF. To tackle the nonphysical DSD broadening in bin-microphysics parameterizations related to numerical diffusion in physical space, we would use various model horizontal and vertical grid spacing. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

PARDO, LIANET HERNANDEZ; MORRISON, HUGH; MACHADO, LUIZ A. T.; HARRINGTON, JERRY Y.; LEBO, ZACHARY J.. Drop Size Distribution Broadening Mechanisms in a Bin Microphysics Eulerian Model. JOURNAL OF THE ATMOSPHERIC SCIENCES, v. 77, n. 9, p. 3249-3273, SEP 2020. (19/06988-4, 16/24562-6)

PARDO, LIANET HERNANDEZ; MACHADO, LUIZ A. T.; MORRISON, HUGH; CECCHINI, MICAEL A.; ANDREAE, MEINRAT O.; POEHLKER, CHRISTOPHER; POESCHL, ULRICH; ROSENFELD, DANIEL; VENDRASCO, EDER P.; VOIGT, CHRISTIANE; et al. bserved and Simulated Variability of Droplet Spectral Dispersion in Convective Clouds Over the Amazo. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, v. 126, n. 20, OCT 27 2021. (16/24562-6, 20/13273-9, 19/06988-4)