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Paul J. Valdes
Researcher at University of Bristol
Publications - 384
Citations - 24048
Paul J. Valdes is an academic researcher from University of Bristol. The author has contributed to research in topics: Climate change & Climate model. The author has an hindex of 77, co-authored 344 publications receiving 20662 citations. Previous affiliations of Paul J. Valdes include University of Oxford & University of Reading.
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An efficient method to generate a perturbed parameter ensemble of a fully coupled AOGCM without flux-adjustment
TL;DR: In this paper, a perturbed parameter ensemble (PPE) of a fully-coupled atmosphere-ocean general circulation model (AOGCM), HadCM3, without requiring flux-adjustment was presented.
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The atmospheric impact of uncertainties in recent Arctic sea-ice reconstructions
TL;DR: In this paper, a set of simulations using the third Hadley Centre Coupled Atmospheric Model (HadAM3) was performed to investigate potential implications of sea ice inaccuracies for climate simulations.
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Quantifying the stability of planktic foraminiferal physical niches between the Holocene and Last Glacial Maximum
TL;DR: In this article, the authors quantitatively test the assumption of stable environmental niches in both space and time for six dominant planktic foraminiferal species (Globigerinoides ruber (pink), G. sacculifer and G. ruber) by contrasting reconstructions of species realized and optimum distributions in the modern and during the Last Glacial Maximum (LGM) using an ecological niche model (ENM; MaxEnt) and ordination framework.
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Assessing Mechanisms and Uncertainty in Modeled Climatic Change at the Eocene‐Oligocene Transition
TL;DR: In this article, the uncertainty in the Earth system response to various imposed forcings typical of changes at the Eocene-Oligocene Transition (EOT) is assessed using an ensemble of simulations from the fully coupled general circulation model, HadCM3L.
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Simulating the climate response to atmospheric oxygen variability in the Phanerozoic: a focus on the Holocene, Cretaceous and Permian
David C. Wade,Nathan Luke Abraham,Alexander Farnsworth,Paul J. Valdes,Fran Bragg,Alexander T. Archibald +5 more
TL;DR: In this article, the authors present the first 3D numerical model simulations to investigate the climate impacts of changes in O2 under different climate states using the coupled atmosphere-ocean HadGEM3-AO and Hadley Centre Coupled Model version 3 (HadCM3-BL) models.