A5051649125- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Methane Hydrates and Related Phenomena
- Pleistocene-Era Hominins and Archaeology
- Isotope Analysis in Ecology
- Climate change and permafrost
- Tree-ring climate responses
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Arctic and Antarctic ice dynamics
- Marine and environmental studies
- Archaeology and ancient environmental studies
- Winter Sports Injuries and Performance
- Ionosphere and magnetosphere dynamics
- Geophysics and Gravity Measurements
- Polar Research and Ecology
- Landslides and related hazards
- Astro and Planetary Science
- Geological Studies and Exploration
- Atmospheric chemistry and aerosols
- Meteorological Phenomena and Simulations
- Peatlands and Wetlands Ecology
- Magnetic confinement fusion research
- Atmospheric Ozone and Climate
- Scientific Research and Discoveries
Institut des Géosciences de l'Environnement
2021-2025
Centre National de la Recherche Scientifique
2010-2025
Institut polytechnique de Grenoble
2023-2025
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2023-2025
Université Grenoble Alpes
2021-2025
Institut de Recherche pour le Développement
2021-2025
Laboratoire des Sciences du Climat et de l'Environnement
2009-2023
University of Copenhagen
2013-2021
ORCID
2021
British Antarctic Survey
2011-2020
Interglacials, including the present (Holocene) period, are warm, low land ice extent (high sea level), end-members of glacial cycles. Based on a level definition, we identify eleven interglacials in last 800,000 years, result that is robust to alternative definitions. Data compilations suggest despite spatial heterogeneity, Marine Isotope Stages (MIS) 5e (last interglacial) and 11c (~400 ka ago) were globally strong (warm), while MIS 13a (~500 was cool at many locations. A step change...
Abstract. The deep polar ice cores provide reference records commonly employed in global correlation of past climate events. However, temporal divergences reaching up to several thousand years (ka) exist between over the last climatic cycle. In this context, we are hereby introducing Antarctic Ice Core Chronology 2012 (AICC2012), a new and coherent timescale developed for four cores, namely Vostok, EPICA Dome C (EDC), Dronning Maud Land (EDML) Talos (TALDICE), alongside Greenlandic NGRIP...
Abstract. Two interglacial epochs are included in the suite of Paleoclimate Modeling Intercomparison Project (PMIP4) simulations Coupled Model (CMIP6). The experimental protocols for mid-Holocene (midHolocene, 6000 years before present) and Last Interglacial (lig127k, 127 000 described here. These equilibrium designed to examine impact changes orbital forcing at times when atmospheric greenhouse gas levels were similar those preindustrial period continental configurations almost identical...
The Last Interglacial (LIG, 129–116 thousand of years BP, ka) represents a test bed for climate model feedbacks in warmer-than-present high latitude regions. However, mainly because aligning different palaeoclimatic archives and from parts the world is not trivial, spatio-temporal picture LIG temperature changes difficult to obtain. Here, we have selected 47 polar ice core sub-polar marine sediment records developed strategy align them onto recent AICC2012 chronology. We provide first...
All together then Many geographically dispersed records from across the globe reveal occurrence of abrupt climate changes, called interstadial events, during last glacial period. These events appear to have happened at same time, but difficulty determining absolute dates in many made that proposition difficult prove. Corrick et al. present results 63 precisely dated speleothems confirm synchrony those events. Their also provide a tool with which validate model simulations change and...
Abstract. The modeling of paleoclimate, using physically based tools, is increasingly seen as a strong out-of-sample test the models that are used for projection future climate changes. New to Coupled Model Intercomparison Project (CMIP6) Tier 1 Last Interglacial experiment 127 000 years ago (lig127k), designed address responses stronger orbital forcing than midHolocene experiment, same state-of-the-art and following common experimental protocol. Here we present first analysis multi-model...
The Last Interglacial (LIG) represents an invaluable case study to investigate the response of components Earth system global warming. However, scarcity absolute age constraints in most archives leads extensive use various stratigraphic alignments different reference chronologies. This feature sets limitations accuracy assignment climatic sequence events across globe during LIG. Here, we review strengths and methods that are commonly used date or develop chronologies for time span (∼140–100...
Abstract. Since its discovery in Greenland ice cores, the millennial scale climatic variability of last glacial period has been increasingly documented at all latitudes with studies focusing mainly on Marine Isotopic Stage 3 (MIS 3; 28–60 thousand years before present, hereafter ka) and characterized by short Dansgaard-Oeschger (DO) events. Recent new results obtained EPICA NorthGRIP cores now precisely describe rapid variations Antarctic temperature during MIS 5 (73.5–123 ka), a time...
Abstract. Although the Last Interglacial (LIG) is often considered as a possible analogue for future climate in high latitudes, its precise evolution and associated causes remain uncertain. Here we compile high-resolution marine sediment records from North Atlantic, Labrador Sea, Norwegian Sea Southern Ocean. We document delay establishment of peak interglacial conditions Seas compared to In particular, observe persistent iceberg melting at northern latitudes beginning LIG. It with (1)...
Abstract. The last glacial period is characterized by a number of millennial climate events that have been identified in both Greenland and Antarctic ice cores are abrupt records. mechanisms governing this variability remain puzzle requires precise synchronization from the two hemispheres to be resolved. Previously, synchronized primarily via their common records gas concentrations or isotopes trapped air cosmogenic measured on ice. In work, we apply core volcanic proxies annual layer...
Abstract. During the last glacial cycle, Greenland temperature showed many rapid variations, so-called Dansgaard–Oeschger (DO) events. The past atmospheric methane concentration closely followed these which implies that warmings recorded in were probably hemispheric extent. Here we substantially extend and complete North Ice Core Project (NGRIP) record from Preboreal Holocene (PB) back to end of interglacial period with a mean time resolution 54 yr. We relate amplitudes increases associated...
Several recent studies from both Greenland and Antarctica have reported significant changes in the water isotopic composition of near-surface snow between precipitation events. These been linked to exchange with atmospheric vapor sublimation-induced fractionation, but processes are poorly constrained by observations. Understanding quantifying these crucial interpretation ice core climate proxies formulation isotope-enabled general circulation models. Here, we present continuous measurements...
Data availability and temporal resolution make it challenging to unravel the anatomy (duration phasing) of Last Glacial abrupt climate changes. Here, we address these limitations by investigating changes using sub-decadal-scale records from Greenland ice cores. We highlight absence a systematic pattern in as recorded different parameters. This diversity sequence seen ice-core data is also observed parameters derived numerical simulations which exhibit self-sustained variability arising...
Abstract The Mid-Pleistocene Transition (~1.2–0.8 million years) corresponds to a time interval when high-amplitude ~100,000 years glacial–interglacial cycles replaced the more subdued ~40,000 cycles. Whether it was triggered by physical processes affecting climate system at specific or gradually over course of Pleistocene, is still an open question. Here we use original approach based on conceptual modelling identify temporal structure controlling factors. By comparing our new simulations...
Abstract. A new deep ice core drilling program, TALDICE, has been successfully handled by a European team at Talos Dome, in the Ross Sea sector of East Antarctica, down to 1620 m depth. Using stratigraphic markers and inverse method, we produce first official chronology core, called TALDICE-1. We show that it notably improves an priori resulting from one-dimensional flow model. It is agreement with posteriori controls accumulation rate thinning function along core. An absolute uncertainty...
Abstract. Insoluble trace gases are trapped in polar ice at the firn-ice transition, approximately 50 to 100 m below surface, depending primarily on site temperature and snow accumulation. Models of gas transport firn used relate air core records their atmospheric history. We propose a new model based following contributions. First, is revised poromechanics framework with emphasis non-homogeneous properties treatment gravitational settling. then derive nonlinear least square multi-gas...
Abstract. Air and water stable isotope measurements from four Greenland deep ice cores (GRIP, GISP2, NGRIP NEEM) are investigated over a series of Dansgaard–Oeschger events (DO 8, 9 10), which representative glacial millennial scale variability. Combined with firn modeling, air data allow us to quantify abrupt temperature increases for each drill site (1σ = 0.6 °C NEEM, GRIP 1.5 NGRIP). Our show that the magnitude stadial–interstadial increase is up 2 larger in central North than northwest...