Late Miocene global cooling and the rise of modern ecosystems

Herbert, Timothy D; Lawrence, K. T.; Tzanova, Alexandrina; Peterson, L. C.; Caballero-Gill, Rocio P; Kelly, Christopher S

doi:10.1038/ngeo2813

Cited by 758 publications

(855 citation statements)

References 58 publications

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“…This was also the case in an earlier study using the same ice sheet model but with parameterised deep sea temperatures (De Boer et al, 2010). The trend we model in sea surface temperatures is also lower than what is suggested by proxy data (Herbert et al, 2016) (not shown). The modelled relation between logarithmic CO 2 and sea level is also sigmoidal.…”

Section: Comparison To Proxy Co 2 Datamentioning

confidence: 53%

“…This finding may be compared to the hybrid data-model results for climate sensitivity of Köhler et al (2015) and to the modelled climate sensitivity of Friedrich et al (2016). Köhler et al (2015) investigated the relation between the radiative forcing of proxy data CO 2 (Petit et al, 1999;Siegenthaler et al, 2005;Lüthi et al, 2008;Hönisch et al, 2009), which is linearly related to logarithmic CO 2 (Myhre et al, 1998), and Figure 8. Relation between the logarithm of CO 2 divided by the PI value of 280 ppm and global temperature anomalies with respect to PI (of the reference run) for the reference simulation (red dots), the simulation with uncoupled ice (blue dots), and the simulation with only surface height (orange dots) or albedo (black dots) coupled.…”

Section: Results and Discussion Ii: Ice Sheet-climate Interactionmentioning

confidence: 99%

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The influence of ice sheets on temperature during the past 38 million years inferred from a one-dimensional ice sheet–climate model

et al. 2017

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Abstract. Since the inception of the Antarctic ice sheet at the Eocene-Oligocene transition ( ∼ 34 Myr ago), land ice has played a crucial role in Earth's climate. Through feedbacks in the climate system, land ice variability modifies atmospheric temperature changes induced by orbital, topographical, and greenhouse gas variations. Quantification of these feedbacks on long timescales has hitherto scarcely been undertaken. In this study, we use a zonally averaged energy balance climate model bidirectionally coupled to a one-dimensional ice sheet model, capturing the ice-albedo and surface-height-temperature feedbacks. Potentially important transient changes in topographic boundary conditions by tectonics and erosion are not taken into account but are briefly discussed. The relative simplicity of the coupled model allows us to perform integrations over the past 38 Myr in a fully transient fashion using a benthic oxygen isotope record as forcing to inversely simulate CO 2 . Firstly, we find that the results of the simulations over the past 5 Myr are dependent on whether the model run is started at 5 or 38 Myr ago. This is because the relation between CO 2 and temperature is subject to hysteresis. When the climate cools from very high CO 2 levels, as in the longer transient 38 Myr run, temperatures in the lower CO 2 range of the past 5 Myr are higher than when the climate is initialised at low temperatures. Consequently, the modelled CO 2 concentrations depend on the initial state. Taking the realistic warm initialisation into account, we come to a best estimate of CO 2 , temperature, ice-volume-equivalent sea level, and benthic δ 18 O over the past 38 Myr. Secondly, we study the influence of ice sheets on the evolution of global temperature and polar amplification by comparing runs with ice sheet-climate interaction switched on and off. By passing only albedo or surface height changes to the climate model, we can distinguish the separate effects of the ice-albedo and surfaceheight-temperature feedbacks. We find that ice volume variability has a strong enhancing effect on atmospheric temperature changes, particularly in the regions where the ice sheets are located. As a result, polar amplification in the Northern Hemisphere decreases towards warmer climates as there is little land ice left to melt. Conversely, decay of the Antarctic ice sheet increases polar amplification in the Southern Hemisphere in the high-CO 2 regime. Our results also show that in cooler climates than the pre-industrial, the ice-albedo feedback predominates the surface-heighttemperature feedback, while in warmer climates they are more equal in strength.

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Section: Comparison To Proxy Co 2 Datamentioning

confidence: 53%

Section: Results and Discussion Ii: Ice Sheet-climate Interactionmentioning

confidence: 99%

The influence of ice sheets on temperature during the past 38 million years inferred from a one-dimensional ice sheet–climate model

et al. 2017

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“…Miocene cooling interval associated with declining atmospheric CO 2 concentrations identified by Herbert et al (2016).…”

Section: B) This High-δ 18 O High-variability Interval Coincides Wimentioning

confidence: 99%

“…North Atlantic Ocean Drilling Programme (ODP) Site 982, situated on the Rockall Plateau, was recovered to document the evolution of intermediate water circulation in the North Atlantic Basin (Shipboard Scientific Party Leg 162, 1996). Palaeoclimate records generated at this location have been fundamental to improving our understanding of climate for the past 12 Ma (Venz et al, 1999;Hodell et al, 2001;Venz and Hodell, 2002;Lisiecki and Raymo, 2005;Hodell and Venz-5 Curtis, 2006;Lawrence et al, 2009;Bolton et al, 2011;Khélifi et al, 2014;Herbert et al, 2016). In particular, the late Miocene benthic stable isotope stratigraphy and astrochronology (Hodell et al, 2001) has been used as the basic stratigraphy and/or age model for a wide range of studies (Bickert et al, 2004;Hodell and Venz-Curtis, 2006;Drury et al, 2016;Herbert et al, 2016;Kontakiotis et al, 2016;De Vleeschouwer et al, 2017).…”

mentioning

confidence: 99%

“…Palaeoclimate records generated at this location have been fundamental to improving our understanding of climate for the past 12 Ma (Venz et al, 1999;Hodell et al, 2001;Venz and Hodell, 2002;Lisiecki and Raymo, 2005;Hodell and Venz-5 Curtis, 2006;Lawrence et al, 2009;Bolton et al, 2011;Khélifi et al, 2014;Herbert et al, 2016). In particular, the late Miocene benthic stable isotope stratigraphy and astrochronology (Hodell et al, 2001) has been used as the basic stratigraphy and/or age model for a wide range of studies (Bickert et al, 2004;Hodell and Venz-Curtis, 2006;Drury et al, 2016;Herbert et al, 2016;Kontakiotis et al, 2016;De Vleeschouwer et al, 2017). However, there is an ongoing debate about the presence of potential stratigraphic issues in the Pliocene successions of Site 982 (Khelifi et al, 2012;Lawrence et al, 2013) and 10 concerns exist that individual cycles may be missing from the late Miocene isotope stratigraphy (Bickert et al, 2004;van der Laan et al, 2005;van der Laan et al, 2012); however, these concerns have not yet been resolved.…”

mentioning

confidence: 99%

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Reinforcing the North Atlantic backbone: revision and extension of the composite splice at ODP Site 982

Drury¹,

Westerhold²,

Hodell³

et al. 2017

Preprint

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Abstract. Ocean Drilling Programme (ODP) Site 982 represents a key location for understanding the evolution of climate in the North Atlantic over the past 12 Ma. However, concerns exist about the validity and robustness of the underlying stratigraphy and astrochronology, which currently limits the adequacy of this site for high-resolution climate studies. To resolve this uncertainty, we verify and extend the early Pliocene to late Miocene shipboard composite splice at Site 982 10 using high-resolution XRF core scanning data and establish a robust high-resolution stable isotope stratigraphy and astrochronology between 4.5 and 8.

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Indonesian Throughflow drove Australian climate from humid Pliocene to arid Pleistocene

Christensen

Renema

Henderiks

et al. 2017

Geophysical Research Letters

108

182

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Late Miocene to mid‐Pleistocene sedimentary proxy records reveal that northwest Australia underwent an abrupt transition from dry to humid climate conditions at 5.5 million years (Ma), likely receiving year‐round rainfall, but after ~3.3 Ma, climate shifted toward an increasingly seasonal precipitation regime. The progressive constriction of the Indonesian Throughflow likely decreased continental humidity and transferred control of northwest Australian climate from the Pacific to the Indian Ocean, leading to drier conditions punctuated by monsoonal precipitation. The northwest dust pathway and fully established seasonal and orbitally controlled precipitation were in place by ~2.4 Ma, well after the intensification of Northern Hemisphere glaciation. The transition from humid to arid conditions was driven by changes in Pacific and Indian Ocean circulation and regional atmospheric moisture transport, influenced by the emerging Maritime Continent. We conclude that the Maritime Continent is the switchboard modulating teleconnections between tropical and high‐latitude climate systems.

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Late Miocene global cooling and the rise of modern ecosystems

Cited by 758 publications

References 58 publications

The influence of ice sheets on temperature during the past 38 million years inferred from a one-dimensional ice sheet–climate model

The influence of ice sheets on temperature during the past 38 million years inferred from a one-dimensional ice sheet–climate model

Reinforcing the North Atlantic backbone: revision and extension of the composite splice at ODP Site 982

Indonesian Throughflow drove Australian climate from humid Pliocene to arid Pleistocene

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