Banca de DEFESA: FELIPE FERREIRA MONTEIRO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : FELIPE FERREIRA MONTEIRO
DATE: 10/12/2020
TIME: 14:00
LOCAL: Plataforma ZOOM/google meet
TITLE:

URBAN HEAT ISLAND AND ITS INFLUENCE ON CLOUD MICROPHYSICS IN BRAZILIAN METROPOLES

KEY WORDS:

Urban Energy Balance; Urban Climate; Thermal Remote Sensing; Urban Precipitation; TRMM; River breezes

PAGES: 90
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUBÁREA: Meteorologia
SPECIALTY: Sensoriamento Remoto da Atmosfera
SUMMARY:

Urban areas modify the surface energy balance, leading to greater heat accumulation, resulting in an increase in air and surface temperature values when compared to surrounding rural areas. This condition is described by the phenomenon of the urban heat island, which has been further investigated by different fields in recent years. This phenomenon affects the health of the population, energy consumption among other areas. In Brazil, the intense urbanization, aggregating larger cities, has direct effects on the intensity of the phenomenon, which increases the risks of mortality from heat-related diseases, in addition to the increase in energy consumption among other impacts. Faced with this context, the concern arose to know in detail about the presence and effects of the ICU phenomenon in large Brazilian metropolises. to verify its influence on the characteristics of precipitation and microphysical properties of clouds. To allow this understanding, methodologies applied to active and passive remote sensing data were used, together with statistical studies, which allowed to understand the effects of the ICU in different metropolitan regions and its relationships with other environmental variables (surface albedo and NDVI), analyzing ICU trends over 17 years (2000-2016) and the similarities between metropolitan regions, from statistical tests such as: Mann Kendall, Theil-Sen, t-Student (t paired). Our results indicate that all the metropolitan regions studied have heat islands, both day and night. Of this total, 10 showed a positive trend in daytime ICU values being related to 2 different biophysical factors investigated, NDVI and superficial Albedo even if at different levels. Manaus was the metropolitan region with the largest registered daytime heat island, besides its homogeneous environment with forest cover, because of this it was selected to evaluate the cloud microphysical properties. The properties Ice Water Path (IWP), Rain Water Path (RWP), Convective Rain and Surface Rain for a period of 15 years (2000-2014) were studied during the dry season of the Manaus metropolitan region. The region was selected because it has the highest intensity of daytime heat island in Brazil. Observations indicated that in the period studied, the rates of urban convective rainfall were always higher, throughout the day. But there were variations in IWP and RWP concentrations, according to the time of day, due to variations in surface energy flows. Regarding the spatial-temporal distribution in the daytime cycle, it was evident that the precipitation and other microphysical properties of the clouds, are modulated by local circulation, especially by the action of river breeze. During the dawn, the highest values of all microphysical properties studied are on the river, while in the afternoon they occur on the banks. In this context we point out that in most of the Brazilian metropolises, during the dry season, the greatest intensities of the urban heat island phenomenon have been identified and that possibly one of the effects is on the reduction of precipitation (convective and surface) on the urban area during the day, which aggravates the impacts of heat on urban inhabitants and exposes the urban surface to a greater load of radiation.

BANKING MEMBERS:
Presidente - 1164414 - WEBER ANDRADE GONCALVES
Interno - 1858120 - DAVID MENDES
Interna - 1346630 - LARA DE MELO BARBOSA ANDRADE
Externa à Instituição - CLÊNIA RODRIGUES ALCÂNTARA - UFCG
Externo à Instituição - ENRIQUE VIEIRA MATTOS - UNIFEI - UNI