@Article{PintoJr:2015:ENTrAt,
author = "Pinto Junior, Osmar",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Thunderstorm climatology of Brazil: ENSO and Tropical Atlantic
connections",
journal = "International Journal of Climatology",
year = "2015",
volume = "35",
number = "6",
pages = "871--878",
month = "May",
keywords = "Brazil, Climatology, ENSO, Thunderstorms, Tropical Atlantic
Ocean.",
abstract = "In this report monthly thunderstorm days (TD) in 14 large cities
of Brazil from 1951 to 2010 are compared with data obtained in the
first part of the 20th century in the same cities and correlated
with sea surface temperature (SST) of the equatorial Pacific Ocean
and Tropical Atlantic Ocean. On average over all cities, 77 TD are
reported each year after 1951, against 43 TD in the first part of
the 20th century, an increase of 79%. The increase seems to be
related to increase in the urbanization in these cities, and not
to global warming. A comparative analysis of TD for the whole
country with El Niņo-Southern Oscillation (ENSO) events suggests
that the tendency for El Niņo to increase the thunderstorm
activity is evident in the South (only in the Spring/Summer),
Southeast, Northeast and North (only in the Fall/Winter) regions.
Regarding the Tropical Atlantic Ocean SST, a similar analysis
using the Tropical South Atlantic (TSA) and Tropical North
Atlantic (TNA) indices suggests that no significant differences
exist between the thunderstorm activity for the two extreme
positive and negative TSA conditions in the South and Southeast
regions, while in the Northeast and North regions there is a
significant increase in the thunderstorm activity during extreme
positive TSA. Differently, only in the Northeast region there is a
significant influence of TNA on thunderstorm activity. The
influence is such that the thunderstorm activity is larger for the
extreme negative TNA than for extreme positive TNA. All
significant changes were quantified and significant variations
were observed. For all parameters investigated (ENSO, TSA and TNA)
the Northeast region showed the most significant changes.",
doi = "10.1002/joc.4022",
url = "http://dx.doi.org/10.1002/joc.4022",
issn = "0899-8418",
label = "self-archiving-INPE-MCTI-GOV-BR",
language = "en",
targetfile = "Pinto_thunderstorn.pdf",
urlaccessdate = "04 maio 2024"
}