TITLE:
Ozone and Aerosol Influence on Ultraviolet Radiation on the East Coast of the Brazilian Northeast
AUTHORS:
Alexandre Boleira Lopo, Maria Helena Constantino Spyrides, Paulo Sérgio Lucio, Javier Sigró
KEYWORDS:
Cluster Analyses; Radiometer; Global Solar Radiation; Cloudiness; Annual Event of Spring from UV
JOURNAL NAME:
Atmospheric and Climate Sciences,
Vol.4 No.1,
January
15,
2014
ABSTRACT:
The purpose of this research is to determine the
influence of Total Ozone and Aerosols about variability of Ultraviolet
Radiation (UV) in the east coast of the Northeastern region of Brazil through
measures from multispectral sensor GUV (Ground-based Ultraviolet Radiometer).
The methodology consisted of descriptive study and cluster analyses using data
of UV in channels UVB (305 nm) and UVA (320 nm, 340 nm and 380 nm) and data of
UV index, Total Ozone, Aerosol, Global Solar Radiation, Cloudiness and Wind.
The results for city of Natal indicated that an annual event occurs in
September/October which stabilizes the UV or UV Index when Total Ozone levels
reach their annual maximum. This event is influenced by marine Aerosol that is
found on mainland at a higher concentration in September due to greater Wind
intensity and their southeasterly direction (sea for land). The cluster
analysis using the variables above allowed us to detect three different groups:
the first group is formed by Natal, Recife and Jo?o Pessoa and so determined
that this event occurs in these three cities; the second group is formed by
Maceió, Aracaju and Salvador and the third group includes only Fortaleza and
had different results.