@Article{BarretoCavaMesqPedr:2019:MuInRa,
author = "Barreto, Naurinete de Jesus da Costa and Cavalcanti, Iracema
Fonseca de Albuquerque and Mesquita, Michel S. and Pedra, George
Ulguim",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Bjerknes Centre for
Climate Research} and {Instituto Nacional de Pesquisas Espaciais
(INPE)}",
title = "Multivariate intraseasonal rainfall index applied to South
America",
journal = "Meteorological Applications",
year = "2019",
volume = "26",
number = "4",
pages = "521--527",
month = "Oct.",
keywords = "intraseasonal, Madden–Julian Oscillation, maximum covariance
analysis.",
abstract = "The intraseasonal variability over South America is investigated
using a multivariate index based on maximum covariance analysis
(MCA). This technique identifies the correlation patterns of two
different data sets. The Climate Prediction Center (CPC) grid
precipitation over South America and the tropical means (15°N15°S)
of outgoing long wave radiation (OLR) and zonal wind component at
850 and 200 hPa (National Oceanic and Atmospheric Administration
(NOAA) and National Centers for Environmental Prediction
(NCEP)/National Center for Atmospheric Research (NCAR) reanalysis,
respectively) are used in the study. The MCA was applied to these
data sets and a Multivariate Intraseasonal Rainfall Index for
South America for South America (MIRI.SA) was constructed based on
the phase and amplitude vectorial projections of the first two
modes. Composites of selected cases when the amplitude was above a
threshold are discussed for different phases of the MaddenJulian
Oscillation (MJO). Phases (8+1) and (4+5) present strong
convection anomalies over the maritime continent and South
America, but with opposite signs. These patterns represent the
dominant mode of precipitation over South America. Phases (2+3)
and (6+7) are transient and related to the secondary mode of
precipitation over South America. A space-phase diagram calculated
using the MIRI.SA index at different lags represents the positive
precipitation locations over both South America and the Equatorial
Pacific. The construction of this diagram in near real time could
be used for monitoring precipitation extremes over different areas
of South America.",
doi = "10.1002/met.1780",
url = "http://dx.doi.org/10.1002/met.1780",
issn = "1350-4827",
language = "en",
targetfile = "Barreto_et_al-2019-Meteorological_Applications.pdf",
urlaccessdate = "20 abr. 2024"
}