Can Indian Ocean SST anomalies influence South American rainfall?

Taschetto, Andréa S.; Ambrizzi, Tércio

doi:10.1007/s00382-011-1165-3

Cited by 54 publications

(50 citation statements)

References 45 publications

(58 reference statements)

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“…Positive IOD events are linked to negative precipitation anomalies across the Australian continent occasionally up to its Pacific coast (Cai et al, 2009), especially when occurring in combination with El Niño events (Meyers et al, 2007;Risbey et al, 2009). Although climate mechanism and relationship between the IOD and South American rainfall have been described in the past (Chan et al, 2008;Taschetto & Ambrizzi, 2012), we believe our findings are probably mostly related to the complex spatiotemporal ENSO-SAM-IOD teleconnections (Cai et al, 2011), but further studies are needed. Although climate mechanism and relationship between the IOD and South American rainfall have been described in the past (Chan et al, 2008;Taschetto & Ambrizzi, 2012), we believe our findings are probably mostly related to the complex spatiotemporal ENSO-SAM-IOD teleconnections (Cai et al, 2011), but further studies are needed.…”

Section: Iod and Sh Fire Activity: Not Only An Indian Ocean Modementioning

confidence: 70%

Climate Change Amplifications of Climate‐Fire Teleconnections in the Southern Hemisphere

Mariani

Holz

Veblen

et al. 2018

Geophysical Research Letters

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Recent changes in trend and variability of the main Southern Hemisphere climate modes are driven by a variety of factors, including increasing atmospheric greenhouse gases, changes in tropical sea surface temperature, and stratospheric ozone depletion and recovery. One of the most important implications for climatic change is its effect via climate teleconnections on natural ecosystems, water security, and fire variability in proximity to populated areas, thus threatening human lives and properties. Only sparse and fragmentary knowledge of relationships between teleconnections, lightning strikes, and fire is available during the observed record within the Southern Hemisphere. This constitutes a major knowledge gap for undertaking suitable management and conservation plans. Our analysis of documentary fire records from Mediterranean and temperate regions across the Southern Hemisphere reveals a critical increased strength of climate‐fire teleconnections during the onset of the 21st century including a tight coupling between lightning‐ignited fire occurrences, the upward trend in the Southern Annular Mode, and rising temperatures across the Southern Hemisphere.

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Section: Iod and Sh Fire Activity: Not Only An Indian Ocean Modementioning

confidence: 70%

Climate Change Amplifications of Climate‐Fire Teleconnections in the Southern Hemisphere

Mariani

Holz

Veblen

et al. 2018

Geophysical Research Letters

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“…2b). Influences of wavetrains from the Indian Ocean toward Southern Atlantic Ocean on South America were also discussed in Saji and Yamagata (2003), Saji et al (2005), Chan et al (2008) and Taschetto and Ambrizzi (2012).…”

Section: Pacific-indian Region Features Associated With Extreme Precimentioning

confidence: 99%

Precipitation extremes over La Plata Basin – Review and new results from observations and climate simulations

Cavalcanti

Carril

Penalba

et al. 2015

Journal of Hydrology

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“…In addition, an Indian Ocean basin-wide warming (considered as a response to ENSO) seems to reinforce from March to May the anomalous circulation in SSA favourable to increased rainfall in SESA and decreased rainfall further north (e.g. Taschetto and Ambrizzi, 2012).…”

Section: Modementioning

confidence: 99%

Influence of the large-scale climate variability on daily rainfall extremes over Argentina

2015

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A singular value decomposition (SVD) analysis was performed jointly on the daily intensity of extreme rainfall (DIER) over Argentina and sea surface temperature (SST) anomalies from 17.5°N–90°S to describe and understand the influence of the large‐scale variability of the SSTs on the regional extreme rainfall events for spring summer, autumn and winter. Three main leading modes were identified in agreement with previous works. Mode 1 activity is strongly related to El Niño‐Southern Oscillation (ENSO). Warm anomalies in the central‐eastern tropical Pacific and western Indian Ocean induce circulation anomalies extended along the South Pacific and the development of a continental‐scale circulation gyre in South America promoting moisture convergence, and in turn favouring DIER positive anomalies, in eastern Argentina. The combined influence of SST anomalies in the tropical Atlantic and western tropical Pacific characterizes Mode 2 activity, which induces an anticyclonic (cyclonic) circulation gyre in southeastern South America promoting anomalous moisture convergence (divergence) and thus positive (negative) DIER anomalies in eastern Argentina in spring and fall (summer and winter). Finally, Mode 3 activity is also influenced by SST anomalies in tropical central‐eastern Pacific from winter to summer. The associated teleconnections contribute to the development of a cyclonic circulation mainly influencing southeastern South America (SESA) circulation to the north of 30°S from summer to winter, and further south in spring.

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Can Indian Ocean SST anomalies influence South American rainfall?

Cited by 54 publications

References 45 publications

Climate Change Amplifications of Climate‐Fire Teleconnections in the Southern Hemisphere

Climate Change Amplifications of Climate‐Fire Teleconnections in the Southern Hemisphere

Precipitation extremes over La Plata Basin – Review and new results from observations and climate simulations

Influence of the large-scale climate variability on daily rainfall extremes over Argentina

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