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ENSO Atmospheric Teleconnections

2020; American Geophysical Union; Linguagem: Inglês

10.1002/9781119548164.ch14

2328-8779

Andréa S. Taschetto, Caroline C. Ummenhofer, Malte F. Stuecker, Dietmar Dommenget, Karumuri Ashok, Regina R. Rodrigues, Sang‐Wook Yeh,

Atmospheric and Environmental Gas Dynamics

Chapter 14 ENSO Atmospheric Teleconnections Andréa S. Taschetto, Andréa S. Taschetto Climate Change Research Centre, University of New South Wales, Sydney, NSW, Australia ARC Centre of Excellence for Climate Extremes, University of New South Wales, Sydney, NSW, AustraliaSearch for more papers by this authorCaroline C. Ummenhofer, Caroline C. Ummenhofer ARC Centre of Excellence for Climate Extremes, University of New South Wales, Sydney, NSW, Australia Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, MA, USASearch for more papers by this authorMalte F. Stuecker, Malte F. Stuecker Department of Oceanography and International Pacific Research Center, University of Hawai'i at Mānoa, Honolulu, HI, USA Center for Climate Physics, Institute for Basic Science, and Pusan National University, Busan, Republic of Korea (now at the University of Hawai'i at Mānoa, HI, USA)Search for more papers by this authorDietmar Dommenget, Dietmar Dommenget ARC Centre of Excellence for Climate Extremes, University of New South Wales, Sydney, NSW, Australia School of Earth, Atmosphere and Environment, Monash University, VIC, AustraliaSearch for more papers by this authorKarumuri Ashok, Karumuri Ashok Centre for Earth, Ocean and Atmospheric Sciences (CEOAS), University of Hyderabad, Hyderabad, IndiaSearch for more papers by this authorRegina R. Rodrigues, Regina R. Rodrigues Department of Oceanography, Federal University of Santa Catarina, Florianópolis, Santa Catarina, BrazilSearch for more papers by this authorSang-Wook Yeh, Sang-Wook Yeh Department of Marine Science and Convergent Technology, Hanyang University, Ansan, Republic of KoreaSearch for more papers by this author Andréa S. Taschetto, Andréa S. Taschetto Climate Change Research Centre, University of New South Wales, Sydney, NSW, Australia ARC Centre of Excellence for Climate Extremes, University of New South Wales, Sydney, NSW, AustraliaSearch for more papers by this authorCaroline C. Ummenhofer, Caroline C. Ummenhofer ARC Centre of Excellence for Climate Extremes, University of New South Wales, Sydney, NSW, Australia Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, MA, USASearch for more papers by this authorMalte F. Stuecker, Malte F. Stuecker Department of Oceanography and International Pacific Research Center, University of Hawai'i at Mānoa, Honolulu, HI, USA Center for Climate Physics, Institute for Basic Science, and Pusan National University, Busan, Republic of Korea (now at the University of Hawai'i at Mānoa, HI, USA)Search for more papers by this authorDietmar Dommenget, Dietmar Dommenget ARC Centre of Excellence for Climate Extremes, University of New South Wales, Sydney, NSW, Australia School of Earth, Atmosphere and Environment, Monash University, VIC, AustraliaSearch for more papers by this authorKarumuri Ashok, Karumuri Ashok Centre for Earth, Ocean and Atmospheric Sciences (CEOAS), University of Hyderabad, Hyderabad, IndiaSearch for more papers by this authorRegina R. Rodrigues, Regina R. Rodrigues Department of Oceanography, Federal University of Santa Catarina, Florianópolis, Santa Catarina, BrazilSearch for more papers by this authorSang-Wook Yeh, Sang-Wook Yeh Department of Marine Science and Convergent Technology, Hanyang University, Ansan, Republic of KoreaSearch for more papers by this author Book Editor(s):Michael J. McPhaden, Michael J. McPhadenSearch for more papers by this authorAgus Santoso, Agus SantosoSearch for more papers by this authorWenju Cai, Wenju CaiSearch for more papers by this author First published: 23 October 2020 https://doi.org/10.1002/9781119548164.ch14Citations: 8Book Series:Geophysical Monograph Series AboutPDFPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShareShare a linkShare onFacebookTwitterLinked InRedditWechat Summary The El Niño Southern Oscillation (ENSO) causes climatic fluctuations in the tropics and extratropics via atmospheric teleconnections. The anomalous Pacific sea surface temperatures associated with ENSO modulate the Walker and Hadley circulations, causing profound impacts on rainfall and temperature over land and oceans. Globally, El Niño events usually lead to a short-term rise in averaged temperatures while global-mean temperatures typically decrease during La Niña events. In addition, during El Niño events, anomalously dry conditions are generally observed in the Maritime Continent, Australia, northern South America, southern Asia, and southern Africa, while anomalously wet conditions typically occur in southwestern North America, western Antarctica, and eastern Africa. While the global effects of La Niña are roughly of opposite sign, this is not true for all regions. This nonlinearity of ENSO atmospheric teleconnections is caused by variations in the location of the anomalous equatorial warming superimposed on the Pacific mean state and interactions of ENSO with off-equatorial regions and other ocean basins, as well as with the annual cycle and other modes of climate variability. Furthermore, nonstationary behavior of ENSO teleconnections can occur either due to stochastic variability or deterministic low-frequency modulations. As the world warms in response to greenhouse gas forcing, climate model projections suggest changes of the Pacific mean state that can intensify ENSO-driven precipitation variability in the Pacific and many regions beyond. Citing Literature El Niño Southern Oscillation in a Changing Climate RelatedInformation