Seasonal climate summary for the southern hemisphere (autumn 2016): El Niño slips into neutral and a negative Indian Ocean Dipole develops

Rosemond, Katie; Tobin, Skie

doi:10.22499/3.6801.007

Cited by 2 publications

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References 10 publications

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“…Following a strong El Niño during 2015-2016 (Rosemond and Tobin, 2018), the ENSO remained in a neutral phase into mid-2017. From mid-2017 the tropical Pacific cooled (Martin and Tobin, 2019), and atmospheric and oceanic indicators began to consolidate in October.…”

Section: Climate Drivers 21 El Niñ O-southern Oscillation (Enso)mentioning

confidence: 99%

Seasonal climate summary for the southern hemisphere (spring 2017): equal-fifth warmest spring on record, with rainfall mixed

Tobin¹

2020

J. South. Hemisph. Earth Syst. Sci.

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This is a summary of the southern hemisphere atmospheric circulation patterns and meteorological indices for spring 2017; an account of seasonal rainfall and temperature for the Australian region and the broader southern hemisphere is also provided. The tropical Pacific Ocean cooled from midwinter , with an unusually late La Niña becoming established by the end of spring. Spring was the equal-fifth warmest on record, in terms of area-averaged national mean temperature, and was characterised by exceptional September warmth over eastern Australia, while rainfall was mixed geographically and from month-to-month, but below average overall.

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Section: Climate Drivers 21 El Niñ O-southern Oscillation (Enso)mentioning

confidence: 99%

Seasonal climate summary for the southern hemisphere (spring 2017): equal-fifth warmest spring on record, with rainfall mixed

Tobin¹

2020

J. South. Hemisph. Earth Syst. Sci.

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“…This was the eighth-warmest value on record in the NOAA data set for austral autumns 1901-2019. Though warmer than autumn 2017, it was cooler (-0.218C) than the record warm SSTs experienced during the austral autumn of 2016 (þ0.788C) (Rosemond and Tobin 2018). The global SST anomalies for autumn 2018, relative to 1961-2000, are shown in Fig.…”

Section: Sea Surface Temperatures (Ssts)mentioning

confidence: 90%

Seasonal climate summary for the southern hemisphere (autumn 2018): a weak La Niña fades, the austral autumn remains warmer and drier

Chapman

Rosemond

2020

J. South. Hemisph. Earth Syst. Sci.

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This is a summary of the austral autumn 2018 atmospheric circulation patterns and meteorological indices for the southern hemisphere, including an exploration of the season’s rainfall and temperature for the Australian region. The weak La Niña event during summer 2017–18 was in retreat as the southern hemisphere welcomed the austral autumn, and before midseason, it had faded. With the El Niño Southern Oscillation and the Indian Ocean Dipole in neutral phases, their influence on the climate was weakened. Warmer than average sea surface temperatures dominated much of the subtropical South Pacific Ocean and provided favourable conditions for the formation of a rare subtropical cyclone over the southeast Pacific Ocean in May. The southern hemisphere sea ice extent was slightly below the autumn seasonal average. The southern hemisphere overall during autumn was drier and warmer than the seasonal average. The season brought warmer than average temperatures and average rains to parts of the continents of Africa and South America. Australia recorded its fourth-warmest autumn, partly due to an intense, extensive and persistent heatwave, which occurred during the midseason. An extraordinary and record-breaking rainfall event occurred over Tasmania’s southeast, under the influence of a negative Southern Annular Mode. The mainland’s northeastern tropical region was wetter than average as a result of tropical cyclones, which formed during an active monsoon. These areas, however, were in contrast to the rest of the continent, which followed the trend of the previous season and remained drier than average; consequently, rainfall deficiencies emerged across the southern half of Australia, and some areas witnessed an increase in extent and severity of these deficiencies.

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Seasonal climate summary for the southern hemisphere (autumn 2016): El Niño slips into neutral and a negative Indian Ocean Dipole develops

Cited by 2 publications

References 10 publications

Seasonal climate summary for the southern hemisphere (spring 2017): equal-fifth warmest spring on record, with rainfall mixed

Seasonal climate summary for the southern hemisphere (spring 2017): equal-fifth warmest spring on record, with rainfall mixed

Seasonal climate summary for the southern hemisphere (autumn 2018): a weak La Niña fades, the austral autumn remains warmer and drier

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