Assessing late Pliocene climate variability over glacial-interglacial timescales (PlioVAR) - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2022

Assessing late Pliocene climate variability over glacial-interglacial timescales (PlioVAR)

Assessing late Pliocene climate variability over glacial-interglacial timescales (PlioVAR)

Résumé

The Pliocene epoch (~2.6-5.3 million years ago) is one of the best resolved examples of a climate state in long-term equilibrium with current or predicted near-future atmospheric CO2 concentrations, characterised by a globally warmer climate, reduced continental ice volume, and reduced ocean/atmosphere circulation intensity compared to today. Towards the end of the Pliocene, there was a marked increase in glaciation in the northern hemisphere and atmospheric CO2 concentrations declined. The Past Global Changes (PAGES) PlioVAR working group aimed to co-ordinate a synthesis of terrestrial and marine data to characterise spatial and temporal variability of Pliocene climate, underpinned by high quality data sets supported by robust stratigraphies. Here we present some of the main findings of this synthesis effort, including new assessments of ocean temperatures during the KM5c interglacial, and recent work assessing orbital-scale climate variability across the late Pliocene-early Pleistocene northern hemisphere ice-sheet growth. We outline our approaches to integrating multi-proxy data recording ocean temperatures, d18O and sea-level variability from a globally distributed suite of marine sediment cores. We explore regional expressions of environmental change across this transition, identifying asynchronous trends and patterns in climate changes. We consider how these results might inform our understanding of past climate forcings and feedbacks during both warm intervals of the past and the development of larger ice sheets in the northern hemisphere.
McClymont et al 2022 PLIOVAR EGU.pdf (294.68 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03811883 , version 1 (12-10-2022)

Identifiants

Citer

Erin Mcclymont, Sze Ling Ho, Heather Ford, Sarah White, Jeroen Groenveld, et al.. Assessing late Pliocene climate variability over glacial-interglacial timescales (PlioVAR). European Geophysical Union Galileo Conference, Aug 2022, Leeds, United Kingdom. ⟨10.5194/egusphere-gc10-pliocene-52⟩. ⟨hal-03811883⟩
20 Consultations
32 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More