Evidence for active El Niño Southern Oscillation variability in the Late Miocene greenhouse climate

Galeotti, Simone; Heydt, Anna S. von der; Huber, Matthew; Bice, David M.; Dijkstra, Henk A.; Jilbert, Tom; Lanci, L.; Reichart, Gert‐Jan

doi:10.1130/g30629.1

Cited by 44 publications

(37 citation statements)

References 28 publications

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“…Our work, based on a much longer time series (1200 yr vs. 250 yr of Galeotti et al 2010) confirms previous findings. Moreover, it also documents that climate forcing other than the ENSO-like oscillations and not previously considered were active in the late Miocene and played an important role in controlling the Messinian evaporite systems.…”

Section: Modern Vs Msc Climate-regulation Mechanismssupporting

confidence: 92%

“…The influence of the El Niño Southern Oscillation (ENSO) has been suggested as a main forcing mechanism for Messinian evaporitic deposits (Galeotti et al 2010), thus implying ENSO variability during the late Miocene and its possible teleconnections. Our work, based on a much longer time series (1200 yr vs. 250 yr of Galeotti et al 2010) confirms previous findings.…”

Section: Modern Vs Msc Climate-regulation Mechanismsmentioning

confidence: 99%

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High-Frequency Cyclicity In the Mediterranean Messinian Evaporites: Evidence For Solar-Lunar Climate Forcing

Manzi¹,

Gennari²,

Lugli³

et al. 2012

Journal of Sedimentary Research

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The deposition of varved sedimentary sequences is usually controlled by climate conditions. The study of two late Miocene evaporite successions (one halite and the other gypsum) consisting of annual varves has been carried out to reconstruct the paleoclimatic and paleoenvironmental conditions existing during the acme of the Messinian salinity crisis, , 6 Ma, when thick evaporite deposits accumulated on the floor of the Mediterranean basin. Spectral analyses of these varved evaporitic successions reveal significant periodicity peaks at around 3-5, 9, 11-13, 20-27 and 50-100 yr. A comparison with modern precipitation data in the western Mediterranean shows that during the acme of the Messinian salinity crisis the climate was not in a permanent evaporitic stage, but in a dynamic situation where evaporite deposition was controlled by quasi-periodic climate oscillations with similarity to modern analogs including Quasi-Biennial Oscillation, El Niño Southern Oscillation, and decadal to secular lunar-and solar-induced cycles. Particularly we found a significant quasi-decadal oscillation with a prominent 9-year peak that is commonly also found in modern temperature records and is present in the contemporary Atlantic Multidecadal Oscillation (AMO) index and Pacific Decadal Oscillation (PDO) index. These cyclicities are common to both ancient and modern climate records because they can be associated with solar and solar-lunar tidal cycles.During the Messinian the Mediterranean basin as well as the global ocean were characterized by different configurations than at present, in terms of continent distribution, ocean size, geography, hydrological connections, and ice-sheet volumes. The recognition of modern-style climate oscillations during the Messinian suggests that, although local geographic factors acted as pre-conditioning factors turning the Mediterranean Sea into a giant brine pool, external climate forcings, regulated by solarlunar cycles and largely independent from local geographic factors, modulated the deposition of the evaporites.

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Section: Modern Vs Msc Climate-regulation Mechanismssupporting

confidence: 92%

Section: Modern Vs Msc Climate-regulation Mechanismsmentioning

confidence: 99%

High-Frequency Cyclicity In the Mediterranean Messinian Evaporites: Evidence For Solar-Lunar Climate Forcing

Manzi¹,

Gennari²,

Lugli³

et al. 2012

Journal of Sedimentary Research

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“…In the MSC sedimentary record, short-term (annual to pluriannual) climate oscillations were inferred from the study of evaporitic deposits (gypsum cumulates and halite) formed at insolation minima (Galeotti et al, 2010;. These oscillations are recorded by small-scale lithologic cycles, consisting of alternating shaly (more humid climate) and evaporitic (more arid climate) laminae.…”

Section: Laminated Layers: Archives Of Short-term Climate Changesmentioning

confidence: 99%

Flocculent layers and bacterial mats in the mudstone interbeds of the Primary Lower Gypsum unit (Tertiary Piedmont basin, NW Italy): Archives of palaeoenvironmental changes during the Messinian salinity crisis

et al. 2014

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Terms of use:Open Access (Article begins on next page) Anyone can freely access the full text of works made available as "Open Access". Works made available under a Creative Commons license can be used according to the terms and conditions of said license. Use of all other works requires consent of the right holder (author or publisher) if not exempted from copyright protection by the applicable law. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Availability: This is the author's manuscript A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT

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“…Coupled global climate models generally do not show a transition into a permanent El Niño SST pattern in warmer climates Huber and Caballero, 2003;Galeotti et al, 2010). This motivated us to prescribe SSTs in the EEP because coupled models are usually unable to reach this equilibrium state.…”

Section: Permanent El Niño and A Connection To Past And Future Climatementioning

confidence: 99%

Implications of the permanent El Niño teleconnection "blueprint" for past global and North American hydroclimatology

Goldner¹,

Huber²,

Diffenbaugh

et al. 2011

Clim. Past

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Abstract. Substantial evidence exists for wetter-thanmodern continental conditions in North America during the pre-Quaternary warm climate intervals. This is in apparent conflict with the robust global prediction for future climate change of a northward expansion of the subtropical dry zones that should drive aridification of many semiarid regions. Indeed, areas of expected future aridification include much of western North America, where extensive paleoenvironmental records are documented to have been much wetter before the onset of Quaternary ice ages. It has also been proposed that climates previous to the Quaternary may have been characterized as being in a state with warmer-than-modern eastern equatorial sea surface temperatures (SSTs). Because equatorial Pacific SSTs exert strong controls on midlatitude atmospheric circulation and the global hydrologic cycle, the teleconnected response from this permanent El Niño-like mean state has been proposed as a useful analogue model, or "blueprint", for understanding global climatological anomalies in the past. The present study quantitatively explores the implications of this blueprint for past climates with a specific focus on the Miocene and Pliocene, using a global climate model (CAM3.0) and a nested high-resolution climate model (RegCM3) to study the hydrologic impacts on global and North American climate of a change in mean SSTs resembling that which occurs during modern El Niño events. We find that the global circulation response to a permanent El Niño resembles a large, long El Niño event. This state also exhibits equatorial super-rotation, which would represent a fundamental change to the tropical circulations. We also find a southward shift in winter storm tracks in the Pacific and Atlantic, which affects precipitation and temperature over the mid-latitudes. In addition, summertime precipitation increases over the majority of the continental UnitedCorrespondence to: A. Goldner (agoldner@purdue.edu)States. These increases in precipitation are controlled by shifts in the subtropical jet and secondary atmospheric feedbacks. Based on these results and the data proxy comparison, we conclude that a permanent El Niño like state is one potential explanation of wetter-than-modern conditions observed in paleoclimate-proxy records, particularly over the western United States.

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Evidence for active El Niño Southern Oscillation variability in the Late Miocene greenhouse climate

Cited by 44 publications

References 28 publications

High-Frequency Cyclicity In the Mediterranean Messinian Evaporites: Evidence For Solar-Lunar Climate Forcing

High-Frequency Cyclicity In the Mediterranean Messinian Evaporites: Evidence For Solar-Lunar Climate Forcing

Flocculent layers and bacterial mats in the mudstone interbeds of the Primary Lower Gypsum unit (Tertiary Piedmont basin, NW Italy): Archives of palaeoenvironmental changes during the Messinian salinity crisis

Implications of the permanent El Niño teleconnection "blueprint" for past global and North American hydroclimatology

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Evidence for active El Niño Southern Oscillation variability in the Late Miocene greenhouse climate

Cited by 44 publications

References 28 publications

High-Frequency Cyclicity In the Mediterranean Messinian Evaporites: Evidence For Solar-Lunar Climate Forcing

High-Frequency Cyclicity In the Mediterranean Messinian Evaporites: Evidence For Solar-Lunar Climate Forcing

Flocculent layers and bacterial mats in the mudstone interbeds of the Primary Lower Gypsum unit (Tertiary Piedmont basin, NW Italy): Archives of palaeoenvironmental changes during the Messinian salinity crisis

Implications of the permanent El Niño teleconnection &quot;blueprint&quot; for past global and North American hydroclimatology

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Implications of the permanent El Niño teleconnection "blueprint" for past global and North American hydroclimatology