[ES_JOBS_NET] Post Doctorate Fellowship, Dept. of Atmospheric Sciences, São Paulo, Brazil

[Christine Wiedinmyer]

Post Doctorate Fellowship 

THE IMPACT ON HAIL PRODUCTION OF AEROSOL LOADING AND WATER VAPOR TRANSPORTED
BY THE LOW LEVEL JET FEEDING INTO SEVERE STORMS IN SOUTHERN BRAZIL 

Supervision: Maria Assunção Faus da Silva Dias 

Contact 

Email : massuncao.dias at gmail.com 

Dept. of Atmospheric Sciences, São Paulo, Brazil 

Deadline: 31/10/2018 

24 months, 40 hours per week 

Salary: ca. 7000 reais/month plus benefits 

In the context of the project: PRIMARY BIOLOGICAL AEROSOL PARTICLES (PBAPS):
SAMPLING AND MODELING AT SOUTHERN BRAZIL ASSOCIATED TO IMPROVEMENTS OF
CLIMATE MODELS 

FAPESP PROJECT (2016/06160-8), coordinators: Profs. Drs. Fábio L T
Gonçalves/Vaughan Phillips 

Context: Airborne particles directly and indirectly impact Earth's climate
as well as human and animal health. This project will explore the status of
the current and incomplete global climatology of hail, hail formation, its
relation to primary biological aerosol particles that are ice nuclei
(PBAP-IN) to explain the observed behavior for the Southern region of
Brazil. Remote sensing techniques and downscaling scenarios will be
considered in the analysis proposed in this project and methods able to
assess the impact of future climate scenarios. This research is expected to
evaluate the knowledge about PBAP-IN and hail phenomena and improve the
modern techniques of detection of hailstorms by satellites, including the
assessment of any signal of climate change impact. Finally, the project will
provide the community with observations of the local and specific conditions
of hailstorms occurrence, related to PBAP-IN and, based on these conditions,
establish the synoptic or large-scale circulation patterns under which the
phenomena occur in the South and Southeast of Brazil and what behavior could
be expected to the future. 

This postdoctoral project will focus on clarifying some of the physical
processes involved in severe storms. 

The objective is to provide a high resolution documentation and diagnostics
of the physics involved in the formation of severe storms in Brazil and
relate their intensity to the water vapor and aerosol loading of the air
mass advected from the North. The main scientific question is whether the
aerosol loading causes an enhancement of the severity of storms in Southeast
and Southern Brazil, in particular with regards to the formation of hail.
The particular interest is on aerosol that may act as cloud condensation
nuclei. The rationale is to investigate the role of cloud microphysics
interactions it in the evolution of severe storms in Brazil. 

Diagnostic analysis with satellite data and numerical simulations with high
resolution numerical models are the tools expected to be used by the pos-doc
candidate in order to address this problem.

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