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Pacific Climate Change and ENSO activity in the mid-Holocene
John C. H. Chiang,Yue Fang,Ping Chang +2 more
- Vol. 2008
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TLDR
In this article, the authors argue that a reduction to the stochastic forcing of the El Nino-Southern Oscillation (ENSO) wrought by Pacific-wide climate changes in response to mid-Holocene (6000 BP) orbital forcing is a viable hypothesis for the observed reduction of ENSO activity during that time.Abstract:
The authors argue that a reduction to the stochastic forcing of the El Nino–Southern Oscillation (ENSO) wrought by Pacific-wide climate changes in response to mid-Holocene (6000 BP) orbital forcing is a viable hypothesis for the observed reduction of ENSO activity during that time. This conclusion is based on comprehensive analysis of an intermediate coupled model that achieves significant reduction to ENSO variance in response to mid-Holocene orbital forcing. The model’s excellent simulation of the tropical Pacific interannual variability lends credibility to the results. Idealized simulations demonstrate that the mid-Holocene influence is communicated to the tropical Pacific largely via climate changes outside of the tropical Pacific, rather than from insolation changes directly on the tropical Pacific. This is particularly true for changes to the ENSO, but also with changes to the cold tongue annual cycle. Previously proposed mechanisms for teleconnected mid-Holocene ENSO changes, including fo...read more
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Journal ArticleDOI
Evolution and forcing mechanisms of El Niño over the past 21,000 years
Zhengyu Liu,Zhengyu Liu,Zhengyao Lu,Xinyu Wen,Bette L. Otto-Bliesner,Axel Timmermann,Kim M. Cobb +6 more
TL;DR: A series of transient Coupled General Circulation Model simulations forced by changes in greenhouse gasses, orbital forcing, the meltwater discharge and the ice-sheet history throughout the past 21,000 years show an orbitally induced strengthening of ENSO during the Holocene epoch.
Journal ArticleDOI
The Tropics in Paleoclimate
TL;DR: A review of the role of the Tropics in paleoclimate changes can be found in this article, where three properties of tropical dynamics are highlighted: the sensitivity of the tropical climate to change, the ability of the Tropical Climate to reorganize, and the ability for the tropical Climate to project its influence globally.
Journal ArticleDOI
Southern Ocean wind response to North Atlantic cooling and the rise in atmospheric CO2: Modeling perspective and paleoceanographic implications
TL;DR: In this article, the authors explored the viability of the atmospheric teleconnection hypothesis using a modeling strategy, focusing on the atmospheric Teleconnection and found that the teleconnection appears to involve two distinct steps: first, the North Atlantic cooling shifts the Intertropical Convergence Zone southward, weakening the southern branch of the Hadley circulation, and second, the altered Hadley cycle in turn modifies the structure of midlatitude westerlies in the South Pacific via the former's influence on the Southern Hemisphere subtropical jet.
Journal ArticleDOI
Links between tropical Pacific seasonal, interannual and orbital variability during the Holocene
Julien Emile-Geay,Kim M. Cobb,Matthieu Carré,Pascale Braconnot,Julie Leloup,Yuxin Zhou,Sandy P. Harrison,Thierry Corrège,Helen McGregor,Matthew Collins,R. Driscoll,Mary Elliot,Birgit Schneider,Alexander W. Tudhope +13 more
TL;DR: In this paper, a reconstruction of seasonal and interannual surface conditions in the tropical Pacific Ocean from a network of high-resolution coral and mollusc records that span discrete intervals of the Holocene is presented.
Journal ArticleDOI
Large-scale features and evaluation of the PMIP4-CMIP6 midHolocene simulations
Chris Brierley,Anni Zhao,Sandy P. Harrison,Pascale Braconnot,Charles Williams,Charles Williams,David Thornalley,Xiaoxu Shi,Jean-Yves Peterschmitt,Rumi Ohgaito,Darrell S. Kaufman,Masa Kageyama,Julia C. Hargreaves,M. P. Erb,Julien Emile-Geay,Roberta D'Agostino,Deepak Chandan,Matthieu Carré,Matthieu Carré,Partrick J. Bartlein,Weipeng Zheng,Zhongshi Zhang,Qiong Zhang,Hu Yang,Evgeny Volodin,Robert A. Tomas,Cody C. Routson,W. Richard Peltier,Bette L. Otto-Bliesner,Polina Morozova,Nicholas P. McKay,Gerrit Lohmann,Allegra N. LeGrande,Chuncheng Guo,Jian Cao,Esther C. Brady,James D. Annan,Ayako Abe-Ouchi,Ayako Abe-Ouchi +38 more
TL;DR: The PMIP4-CMIP6 ensemble for the mid-Holocene has a global mean temperature change of −0.3 ǫK, which is − 0.2 ôK cooler than the previous generation (PMIP3 -CMIP5) of simulations as mentioned in this paper.
References
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TL;DR: A project to objectively analyze historical ocean temperature, salinity, oxygen, and percent oxygen saturation data for the world ocean has recently been completed at the National Oceanic and Atmospheric Administration's (NOAA) Geophysical Fluid Dynamics Laboratory, Princeton, New Jersey.
Book
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Stephen E. Zebiak,Mark A. Cane +1 more
TL;DR: In this article, a coupled atmosphere-ocean model is developed and used to study the ENSO (El Niñ/Southern Oscillation) phenomenon, which reproduces certain key features of the observed phenomenon including the recurrence of warm events at irregular intervals with a preference for three to four years.
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An Intercomparison of Methods for Finding Coupled Patterns in Climate Data
TL;DR: In this paper, the authors introduce a conceptual framework for comparing methods that isolate important coupled modes of variability between time series of two fields, including principal component analysis with the fields combined (CPCA), canonical correlation analysis (CCA), and singular value decomposition of the covariance matrix between the two fields (SVD).
Journal ArticleDOI
Results of PMIP2 coupled simulations of the Mid-Holocene and Last Glacial Maximum - Part 1: experiments and large-scale features
Pascale Braconnot,Bette L. Otto-Bliesner,Sandy P. Harrison,Sylvie Joussaume,J.-Y. Peterchmitt,Ayako Abe-Ouchi,Michel Crucifix,Michel Crucifix,E. Driesschaert,Thierry Fichefet,Chris Hewitt,Masa Kageyama,A. Kitoh,Alexandre Laîné,Marie-France Loutre,Olivier Marti,Ute Merkel,Gilles Ramstein,Paul J. Valdes,S. L. Weber,Yongqiang Yu,Yan Zhao +21 more
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