Effects of El Niño Southern Oscillation on the space–time variability of Agricultural Reference Index for Drought in midlatitudes

Gelcer, Eduardo; Fraisse, Clyde W.; Dzotsi, K.A.; Hu, Zhengjun; Mendes, Renan Santos; Zotarelli, Lincoln

doi:10.1016/j.agrformet.2013.02.006

Cited by 41 publications

(26 citation statements)

References 37 publications

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“…However, there is excessive rainfall during El Niño years (an increase in rainfall of 30-40 %) and drought during the La Niña years (an decrease in rainfall of 10-30 %). In Rio Grande do Sul, the excessive rainfall during El Niño years is more pronounced due to a higher frequency of cold fronts during the warm phase of El Niño-Southern Oscillation (ENSO); see Gelcer et al (2013) for more details. These persistent climate anomalies can last from 6 months up to 1.5 years as discussed by Berlato and Fontana (2003).…”

Section: A Prestes Et Al: Araucaria Growth Response To Solar and CLmentioning

confidence: 99%

Araucaria growth response to solar and climate variability in South Brazil

et al. 2018

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Abstract. In this work, the Sun-Earth-climate relationship is studied using tree growth rings of Araucaria angustifolia (Bertol.) O. Kuntze collected in the city of Passo Fundo, located in the state of Rio Grande do Sul (RS), Brazil. These samples were previously studied by Rigozo et al. (2008); however, their main interest was to search for the solar periodicities in the tree-ring width mean time series without interpreting the rest of the periodicities found. The question arises as to what are the drivers related to those periodicities. For this reason, the classical method of spectral analysis by iterative regression and wavelet methods are applied to find periodicities and trends present in each tree-ring growth, in Southern Oscillation Index (SOI), and in annual mean temperature anomaly between the 24 and 44 • S. In order to address the aforementioned question, this paper discusses the correlation between the growth rate of the tree rings with temperature and SOI. In each tree-ring growth series, periods between 2 and 7 years were found, possibly related to the El Niño/La Niña phenomena, and a ∼ 23-year period was found, which may be related to temperature variation. These novel results might represent the tree-ring growth response to local climate conditions during its lifetime, and to nonlinear coupling between the Sun and the local climate variability responsible to the regional climate variations.

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Section: A Prestes Et Al: Araucaria Growth Response To Solar and CLmentioning

confidence: 99%

Araucaria growth response to solar and climate variability in South Brazil

et al. 2018

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“…The highest power values (red in Figure 9) (2006/2007 and 2009/2010) and lower (2003/2004) than the mean temperatures from the other cycles. The temperature changes in the first two cycles are likely associated with ENSO events during these periods, which increased the temperature during the summer in southern Brazil (Gelcer et al 2013).…”

Section: Changes In Phenological Metrics With Inter-annual Temperaturmentioning

confidence: 99%

“…In south Brazil, inter-annual temperature behaviour is affected by El Niño southern oscillation (ENSO) events (Gelcer et al 2013). However, the effects of anomalous temperature patterns on MODIS TIMESAT phenological metrics have not been studied in deciduous forests in the southern Brazil region.…”

Section: Introductionmentioning

confidence: 99%

Relationships between MODIS phenological metrics, topographic shade, and anomalous temperature patterns in seasonal deciduous forests of south Brazil

Teles

Galvão

Breunig

et al. 2015

International Journal of Remote Sensing

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We investigated the relationships between 11 phenological metrics, topographic shade, and anomalous temperature patterns detected using wavelet analysis in seasonal deciduous forests of south Brazil. To obtain the metrics, we applied the TIMESAT algorithm to the enhanced vegetation index (EVI) from Moderate Resolution Imaging Spectroradiometer (MODIS)/Terra. MODIS acquires data from the study area under a large seasonal amplitude in the solar zenith angle (SZA). We evaluated the effect of topography on phenological metrics by correlating the metrics with shaded relief values. To analyse the inter-annual phenological metric variations with anomalous and regular temperature patterns, we calculated standard anomalies for each metric. Finally, we established relationships between the metrics and the minimum, maximum, and mean temperatures from growing seasons that spanned over 10 seasonal cycles between 2002 and 2012. The correlation results with shaded relief showed that the left (LD) and right derivative (RD), small integral (SInt), seasonal amplitude (SA), base level (BL), and maximum VI value (MV) were sensitive to topographic effects. The seasonal cycles with the highest temperatures in the growing season (2006/2007 and 2009/2010) exhibited a delay at the end of the cycle and a higher interval of duration and productivity, which was indicated by the positive standard anomalies for end of season (EOS), length of season (LOS), large integral (LInt), and SInt. We observed a different result for the lowest temperature cycle (2003/2004). The means for these metrics in anomalous seasons differed significantly from the metrics of other regular cycles at the 0.05 significance level using paired t-tests. Statistically significant correlations were observed between the metrics and minimum and mean temperature values of the 10 seasonal cycles.

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“…Kaldellis e Kondili (2007) relatam que o aumento da demanda para consumo humano e irrigação, redução das precipitações e aumento do uso de água subterrânea têm gerado escassez em determinadas regiões na Grécia, situação essa similar à verificada na RMSP, embora a população não tenha plena informação sobre isso (Ribeiro, 2011). Essa situação tem afetado de maneira indiscriminada os mais diversos países, como China Wang, 2010); Austrália (Tapsuwan et al, 2014); Arábia Saudita (Ouda, 2014); Espanha (Milano et al, 2013); Estados Unidos (Gelcer et al, 2013); Chile (Meza, 2013;Núñez et al, 2013); Taiwan (Tsai;Elsberry, 2013), além de outras áreas na Europa e América do Norte (Hejazi et al, 2014).…”

Section: Revisão Da Literaturaunclassified

“…A influência do fenômeno também é verificada em Minas Gerais (Mello et al, 2008), na disponibilidade hídrica do Rio Grande do Sul (Teixeira;Satyamurty, 2011;Silva, 2010) (Arumí et al, 2013;Meza, 2013), Taiwan (Tsai;Elsberry, 2013), sul da China (Zhang et al, 2013) e Califórnia (Gelcer et al, 2013).…”

Section: Revisão Da Literaturaunclassified

Crise de abastecimento de água em São Paulo e falta de planejamento estratégico

Côrtes

Torrente

Pinto³

et al. 2015

Estud. av.

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Embora a crise no abastecimento de água na Região Metropolitana de São Paulo (RMSP) tenha se manifestado de maneira mais intensa no verão de 2013-2014, ela revela um problema crônico que vem afetando toda a Região nos últimos dez anos. Esse problema foi gerado pela falta de um planejamento estratégico que considere questões climatológicas que podem indicar, com meses de antecedência, problemas de recomposição dos níveis dos mananciais, permitindo que ações sejam empreendidas com razoável antecedência, reduzindo os impactos para a população. Este estudo mostra como é possível utilizar informações climáticas na gestão estratégica do sistema de abastecimento da RMSP.

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Effects of El Niño Southern Oscillation on the space–time variability of Agricultural Reference Index for Drought in midlatitudes

Cited by 41 publications

References 37 publications

Araucaria growth response to solar and climate variability in South Brazil

Araucaria growth response to solar and climate variability in South Brazil

Relationships between MODIS phenological metrics, topographic shade, and anomalous temperature patterns in seasonal deciduous forests of south Brazil

Crise de abastecimento de água em São Paulo e falta de planejamento estratégico

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