Banca de DEFESA: DANIEL CAMILO FORTUNATO DOS SANTOS OLIVEIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : DANIEL CAMILO FORTUNATO DOS SANTOS OLIVEIRA
DATA : 12/04/2019
HORA: 10:30
LOCAL: Auditório CCET
TÍTULO:

OPTICAL PROPERTIES OF ATMOSPHERIC AEROSOLS IN THE ATMOSPHERE OF NATAL/RN MEASURED BY A SUN PHOTOMETER OF THE AERONET NETWORK

PALAVRAS-CHAVES:

CIMEL. Desert dust. RIMA. LIDAR. HYSPLIT.

PÁGINAS: 120
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Geociências
SUBÁREA: Meteorologia
ESPECIALIDADE: Sensoriamento Remoto da Atmosfera
RESUMO:

The study of atmospheric aerosols contributes to the understanding of radiative forcing and global warming. In addition, aerosols may influence visibility, acid rain, human health and precipitation. Since 2016, Natal, capital of Rio Grande do Norte, Brazil, has a solar photometer (CIMEL) of the RIMA-AERONET network that can identify the presence of biomass burning aerosols and desert dust from Africa. For this identification, it is aimed to characterize the optical properties of these aerosols present in the atmospheric of Natal (RN). The data available by AERONET, at level 1.5, Version 3, provide information on some microphysical characteristics such as Optical Aerosol Depth (AOD), Ångström Coefficient (α), Single Scattering Albedo (SSA), Asymmetry Factor (g), Complex Refractive Index (N), Volume Size Distribution (VSD) and Precipitable Water. The data collection period was from August 2017 to August 2018. Aerosols were classified based on global climatologies and their optical properties were described. Observations were compared with daily measurements satellite and the local LIDAR over the course of a day for a case study. In adition, backward trajectories were modeled with the HYSPLIT model to verify the origin and the predominant of the air masses. Aerosols present in the atmospheric column of Natal showed monthly means of AOD in the range of 0.10 to 0.15 with peak of ~40%, monthly means of α between 0.6 and 0.8 with peak above 30%, bimodal DTV with dominant coarse mode, SSA about 0.8, real part around 1.5, imaginary part raging from 0.0125 to 0.0437 and g above 0.74. The Precipitable Water accompanied the increase of the precipitation for the months of December, January, February and March. The classification identified mixed aerosols (60.40%), marine aerosols (30.69%) and mineral dust (8.91%). The backward trajectories showed that in ~51% of the cases the aerosols origined from the African Continent.

MEMBROS DA BANCA:
Interno - 2086472 - BERGSON GUEDES BEZERRA
Externa à Instituição - ELENA MONTILLA-ROSERO - EAFIT
Externa à Instituição - ELISA THOMÉ SENA - USP
Externo à Instituição - FÁBIO JULIANO DA SILVA LOPES - IPEN
Presidente - 1879213 - JUDITH JOHANNA HOELZEMANN