@Article{SilvaLongAndr:2017:SpTeVa,
author = "Silva, Fernanda Batista and Longo, Karla Maria and Andrade, Felipe
Marques de",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)}",
title = "Spatial and temporal variability patterns of the urban heat island
in S{\~a}o Paulo",
journal = "Environments",
year = "2017",
volume = "4",
number = "2",
pages = "1--26",
keywords = "urban heat island, air temperature, S{\~a}o Paulo, multivariate
statistical techniques, empirical orthogonal function, cluster
analysis.",
abstract = "The spatial and temporal variability patterns of the urban heat
island (UHI) in the metropolitan area of Sao Paulo (MASP) were
investigated using hourly temperature observations for a 10-year
period from January 2002 to December 2011. The empirical
orthogonal function (EOF) and cluster analysis (CA) techniques for
multivariate analysis were used to determine the dominant modes of
UHI variability and to identify the homogeneity between the
temperature observations in the MASP. The EOF method was used to
obtain the spatial patterns (T-mode EOF) and to define temporal
variability (S-mode EOF). In the T-mode, three main modes of
variability were recognized. The first EOF explained 66.7% of the
total variance in the air temperature, the second explained 24.0%,
and the third explained 7.8%. The first and third EOFs were
associated with wind movement in the MASP. The second EOF was
considered the most important mode and was found to be related to
the level of urbanization in the MASP, the release of heat stored
in the urban canopy and the release of heat by anthropogenic
sources, thus representing the UHI pattern in the MASP. In the
S-mode, two modes of variability were found. The first EOF
explained 49.4% of the total variance in the data, and the second
explained 30.9%. In the S-mode, the first EOF represented the
spatial pattern of the UHI and was similar to the second EOF in
the T-mode. CA resulted in the identification of six homogeneous
groups corresponding to the EOF patterns observed. The standard
UHI according to the scale and annual seasons for the period from
2002 to 2010 presented maximum values between 14:00 and 16:00
local time (LT) and minimum values between 07:00 and 09:00 LT.
Seasonal analysis revealed that spring had the highest maximum and
minimum UHI values relative to the other seasons.",
doi = "10.3390/environments4020027",
url = "http://dx.doi.org/10.3390/environments4020027",
issn = "2076-3298",
language = "en",
targetfile = "environments-04-00027-v2.pdf",
urlaccessdate = "05 maio 2024"
}