Banca de DEFESA: KECIA MARIA ROBERTO DA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : KECIA MARIA ROBERTO DA SILVA
DATE: 25/02/2022
TIME: 15:00
LOCAL: Videoconferência
TITLE:

Climatology of Sea and Land Breezes in the State of Alagoas

KEY WORDS:

Sea breezes, ERA5-L reanalysis, climatology, NEB.

PAGES: 116
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUBÁREA: Meteorologia
SUMMARY:

The breeze is an important factor in explaining the diurnal wind cycle in coastal
regions, which, in turn, implies the advection of weather conditions from the sea
to the land surface and vice versa. In the NEB region (Northeast Brazil) the
winds are controlled by the circulation of trade winds and breezes. The
magnitude of the large-scale wind flow, whether parallel or perpendicular to the
orientation of the coast, where the differential heating between land and sea
occurs, is decisive for the potential of breezes formation and their penetration
into the continental interior. Some studies were carried out at NEB on the
interaction of breezes with other systems, such as complex topographic
systems, synoptic-scale wind, analysis of local precipitation variation and
analysis of the territorial extent of the breeze. However, in Alagoas, there are
few records of studies on breezes. In this sense, daily, seasonal and annual
climatologies were used to analyze the diurnal cycle of breezes in this work,
through surface meteorological observations from INMET (National Institute of
Meteorology) stations in Alagoas, as well as data from the fifth generation of
reanalysis surface from the European Center for Medium-Range Weather
Forecasts (ECMWF), ERA5-Land. The ERA5-Land reanalysis was validated for
Alagoas having as reference the 7 INMET surface stations. From these data,
the comparative climatologies of the variables were generated: air temperature,
surface pressure, relative humidity, precipitation, wind direction and speed in a
period of 11 years, from mid-2008 to December 2019. The temperature and
pressure were corrected with a bias of up to 0.7°C and 11.93 hPa and an
RMSE of 0.34°C and 11.9 hPa. For the analysis of the breezes, the same
meteorological parameters were used, except for precipitation, through the
method of simultaneous alteration of the variables, to detect frontogenesis
times. There were 450 days with breezes (average of detections for the 7
seasons) in the study period, being 21.42% in winter and 28.33% in summer,
with maximum front development starting at 17h UTC and predominance of
28% of cases in March and April. It was observed that the closer to the coast,
the sooner the formation of the FBM (Maritime Breeze Front) begins. It was also
observed that the sea breeze has a significant potential to lower the
temperature and increase the local relative humidity during the afternoon, as
also seen in other studies. The results show the influence of breezes on the
local climate, affecting thermal comfort, providing moisture to the atmosphere

on the dispersion of pollutants etc., and indicates the need for representative
wind reanalysis for regional and local scale, in order to spatially broaden the
understanding of this system, in which there is a lack of observation data.

BANKING MEMBERS:
Externo à Instituição - DIRCEU LUÍS HERDIES - USP
Interno - 1537309 - FABRICIO DANIEL DOS SANTOS SILVA
Presidente - 2347007 - HELBER BARROS GOMES
Externo à Instituição - HENRIQUE MELO JORGE BARBOSA