@Article{CerónDíEsTaAnKaCa:2022:Im1920,
author = "Cer{\'o}n, Wilmar L. and D{\'{\i}}az, Nilton and
Escobar-Carbonari, Daniel and Tapasco, Jeimar and Andreoli, Rita
V. and Kayano, Mary Toshie and Canchala, Teresita",
affiliation = "{Universidad del Valle} and {International Center for Tropical
Agriculture (CIAT)} and {International Center for Tropical
Agriculture (CIAT)} and {International Center for Tropical
Agriculture (CIAT)} and {Instituto Nacional de Pesquisa da
Amaz{\^o}nia (INPA)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Universidad del Valle}",
title = "Multiscale Interactions of Climate Variability and Rainfall in the
Sogamoso River Basin: Implications for the 1998–2000 and 2010–2012
Multiyear La Niña Events",
journal = "Water (Switzerland)",
year = "2022",
volume = "14",
number = "22",
pages = "e3635",
month = "Nov.",
keywords = "Colombia, multiyear La Niña, precipitation, Sogamoso River Basin,
standardized precipitation index.",
abstract = "In this research, we explored rainfall variability in the Sogamoso
River Basin (SRB), its relationship with multiple scales of
variability associated with El NiñoSouthern Oscillation (ENSO),
and the implications for rainfall prolongation during multiyear La
Niña events. First, we examined time-frequency rainfall variations
in the SRB based on the standardized precipitation index (SPI)
from 1982 to 2019, using wavelet transform and principal component
analysis (PCA). In addition, we applied wavelet analysis to
investigate the links at different time scales between ENSO and
the main mode of rainfall variability in the SRB. Finally, we
explored the role that each scale of variability played in the
prolongation and intensity of rainfall in the SRB during the
19982000 and 20102012 multiyear La Niña events. The results of the
wavelet analyses revealed significant ENSO relationships affecting
SRB rainfall at three different scales: quasi-biennial (23-years)
between 1994 and 2002, as well as from 2008 to 2015; interannual
(57 years) from 1995 to 2011; and quasi-decadal (912 years) from
1994 to 2012. This indicates that multiyear events are a
consequence of the interaction of several scales of variability
rather than a unique scale. During the 19982000 event, El Niño
conditions were observed during the first half of 1998;
subsequently, a cooling of the central and eastern tropical
Pacific (western tropical Pacific) on the quasi-biennial
(interannual) scale was observed during 1999; in 2000, only La
Niña conditions were observed on the interannual scale. Therefore,
during this event, the quasi-biennial (interannual) scale promoted
wet conditions in the Caribbean, the Andes, and the Colombian
Pacific from JuneAugust (JJA) 1998 to JJA 1999 (during 19992000).
During the 20102012 La Niña event, the interbasin sea surface
temperature gradient between the tropical Pacific and tropical
North Atlantic contributed to strengthening (weakening) of the
Choco jet (Caribbean low-level jet) on the quasi-biennial scale
during 2010, and the interannual scale prolonged its
intensification (weakening) during 20112012, acting to extend the
rainy periods over most of the Colombian territory. Variations on
quasi-decadal scales were modulated by the Pacific decadal
oscillation (PDO), resulting in a further intensification of the
20102012 La Niña event, which developed under conditions of the
cold PDO (CPDO) phase, whereas the 19982000 La Niña occurred
during the transition from warm (WPDO, 19771998) to cold (CPDO,
20012015) conditions. These results indicate that the interaction
of quasi-biennial to quasi-decadal scales of variability could
play a differential role in the configuration and prolongation of
rainfall events in the SRB.",
doi = "10.3390/w14223635",
url = "http://dx.doi.org/10.3390/w14223635",
issn = "2073-4441",
language = "en",
targetfile = "water-14-03635-v3.pdf",
urlaccessdate = "18 abr. 2024"
}