Banca de DEFESA: WANDA TATHYANA DE CASTRO SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : WANDA TATHYANA DE CASTRO SILVA
DATE: 16/07/2021
TIME: 08:00
LOCAL: VIDEOCONFERÊNCIA
TITLE:

Sand-time variability of the Humidex index over the Northeast region of Brazil.

KEY WORDS:

climate, atmosphere, thermal comfort.

PAGES: 37
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUBÁREA: Meteorologia
SUMMARY:

Thermal comfort, Humidex, is a very important variable to assess the degree of thermal stress
on living beings. Because it depends on climatic variables, Humidex has a space-time-
intensity variation conditioned to various weather and climate attenuators. Thus, the objective
of this work is to verify possible trends and spatio-temporal analysis of the Humidex index on
the Northeast of Brazil (NEB). ERA5 data distributed by ECMWF was used for the period
from 1990 to 2019. It was found that the MATOPIBA region was the one that stood out the
most with positive discomfort trends over NEB, as well as the region with the largest
Humidex indexes. While on the NEB coast there were low Humidex valleys which may be
associated with oceanic influence. It was observed that the night time has a positive trend on
NEB, especially on MATOPIBA. In addition to the hourly scale, it was also found that on the
monthly, seasonal and annual scale, this region of MATOPIBA has a highlight. This is due to
the fact that the replacement of the natural forest by agricultural production, in which, it
directly affects the energy balance in this region. It was found that in the La Niña period it
was considered relatively more comfortable thermally, whereas in the El Niño period it was
reversed. The reduction and increase in precipitation on the NEB due to El Niño and La Niña
led to the attenuation of the Humidex index. Therefore, the Humidex index was studied and
the attenuation of this index in relation to the time-spatial scale was altered due to
meteorological systems, change due to the modification of land use and attenuation due to the
El Niño and La Niña phenomena.

BANKING MEMBERS:
Presidente - 2331771 - GEORGENES HILARIO CAVALCANTE SEGUNDO
Interno - 4421297 - HELIOFABIO BARROS GOMES
Externo à Instituição - RONABSON CARDOSO FERNANDES - UFRN