A5026706188- Geology and Paleoclimatology Research
- Climate variability and models
- Isotope Analysis in Ecology
- Tree-ring climate responses
- Cryospheric studies and observations
- Atmospheric and Environmental Gas Dynamics
- Meteorological Phenomena and Simulations
- Atomic and Subatomic Physics Research
- Astro and Planetary Science
- Geological formations and processes
- Aeolian processes and effects
- Parallel Computing and Optimization Techniques
- Methane Hydrates and Related Phenomena
- Distributed and Parallel Computing Systems
- Pleistocene-Era Hominins and Archaeology
- Plant responses to elevated CO2
- Embedded Systems Design Techniques
- Cloud Computing and Resource Management
- Paleontology and Stratigraphy of Fossils
- Ionosphere and magnetosphere dynamics
- Geological and Geophysical Studies Worldwide
- Advanced Data Storage Technologies
- Tropical and Extratropical Cyclones Research
- Evolutionary Algorithms and Applications
- Sustainability and Ecological Systems Analysis
Laboratoire des Sciences du Climat et de l'Environnement
2014-2025
Institut Pierre-Simon Laplace
2010-2025
Centre National de la Recherche Scientifique
2008-2024
CEA Paris-Saclay
2004-2024
Université Paris-Saclay
2016-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2008-2024
Université de Versailles Saint-Quentin-en-Yvelines
2008-2024
Sorbonne Université
2019
Institut de Recherche pour le Développement
2019
Structure et Instabilité des Génomes
2019
Amplification of the northern hemisphere seasonal cycle insolation during mid‐Holocene causes a northward shift main regions monsoon precipitation over Africa and India in all 18 simulations conducted for Paleoclimate Modeling Intercomparison Project (PMIP). Differences among are related to differences model formulation. Despite qualitative agreement with paleoecological estimates biome shifts, magnitude increases underestimated by models.
Abstract. This paper is the first of a series four GMD papers on PMIP4-CMIP6 experiments. Part 2 (Otto-Bliesner et al., 2017) gives details about two interglacial experiments, 3 (Jungclaus last millennium experiment, and 4 (Kageyama Last Glacial Maximum experiment. The mid-Pliocene Warm Period experiment part Pliocene Model Intercomparison Project (PlioMIP) – Phase 2, detailed in Haywood al. (2016).The goal Paleoclimate Modelling (PMIP) to understand response climate system different...
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...
Abstract. The Last Glacial Maximum (LGM, 21 000 years ago) is one of the suite paleoclimate simulations included in current phase Coupled Model Intercomparison Project (CMIP6). It an interval when insolation was similar to present, but global ice volume at a maximum, eustatic sea level or close minimum, greenhouse gas concentrations were lower, atmospheric aerosol loadings higher than today, and vegetation land-surface characteristics different from today. LGM has been focus for Paleoclimate...
Abstract. The mid-Holocene (6000 years ago) is a standard time period for the evaluation of simulated response global climate models using palaeoclimate reconstructions. latest simulations are entry card Palaeoclimate Model Intercomparison Project (PMIP4) component current phase Coupled (CMIP6) – hereafter referred to as PMIP4-CMIP6. Here we provide an initial analysis and results experiment mid-Holocene. We show that state-of-the-art produce changes broadly consistent with theory...
Mid-latitude eddies are an important component of the climatic system due to their role in transporting heat, moisture and momentum from tropics poles, also for precipitation associated with fronts, especially winter. We study northern hemisphere storm-tracks at Last Glacial Maximum (LGM) influence on using ocean-atmosphere general circulation model (OAGCM) simulations second phase Paleoclimate Modelling Intercomparison Project (PMIP2). The difference PMIP1 results terms sea-surface...
Abstract. We describe the creation of a data set describing changes related to presence ice sheets, including ice-sheet extent and height, ice-shelf extent, distribution elevation ice-free land at Last Glacial Maximum (LGM), which were used in LGM experiments conducted as part fifth phase Coupled Modelling Intercomparison Project (CMIP5) third Palaeoclimate (PMIP3). The CMIP5/PMIP3 sets created from reconstructions made by three different groups, all obtained using model-inversion approach...
Abstract. The data request of the Coupled Model Intercomparison Project Phase 6 (CMIP6) defines all quantities from CMIP6 simulations that should be archived. This includes both general interest needed most CMIP6-endorsed model intercomparison projects (MIPs) and are more specialized only to a single endorsed MIP. complexity has increased early days intercomparisons, as volume. In contrast with CMIP5, requires distinct sets highly tailored variables saved each than 200 experiments. places...
Abstract. Two interglacial epochs are included in the suite of Paleoclimate Modeling Intercomparison Project (PMIP4) simulations Coupled Model (CMIP6). The experimental protocols for Tier 1 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...
Paleoclimate information has played a key role in demonstrating how the Earth System responds to variety of external forcings and earth’s climate is tightly related atmospheric greenhouse gas concentrations. Although no strict analogue possible future states exists, testing our understanding earth system, as embedded system models, for conditions widely different from historical period, made by existence paleoclimate paleoenvironmental reconstructions. Since its start 1995, PMIP,...
The Paleoclimate Modelling Intercomparison Project (PMIP) was launched in 1995 and has since closely followed the phases of Coupled Model (CMIP) providing understanding past climate states based on latest Global Climate Models evaluation their capacity to represent climates very different from recent one. PMIP is planning its next phase, wake CMIP7 launch (Dunne et al., 2024). organised along two main phases: Fast Track, be delivered time for results analysed published seventh assessment...
Abstract. The goal of the Palaeoclimate Modelling Intercomparison Project (PMIP) is to understand response climate system changes in different forcings and feedbacks. Through comparison with observations environmental impacts these changes, or reconstructions based on physical, chemical biological records, PMIP also addresses issue how well state-of-the-art models simulate changes. states are radically from those recent past documented by instrumental record thus provide an out-of-sample...
Abstract. We investigate the climate impact of reduced dust during mid-Holocene using simulations with IPSL model. consider where is either prescribed from an PI simulation or CESM (Albani et al., 2015). In addition, we also extreme case suppressed. focus on estimation radiative effects and relative responses African Indian monsoon, showing how local forcing orography affect atmospheric temperature profiles, humidity precipitation. The simulated statistically different in many regions...
Abstract. The Last Glacial Maximum (LGM, 21,000 years ago) is one of the suite paleoclimate simulations included in current phase Coupled Model Intercomparison Project (CMIP6). It an interval when insolation was similar to present, but global ice volume at a maximum, eustatic sea level or close minimum, greenhouse gas concentrations were lower, atmospheric aerosol loadings higher than today, and vegetation land-surface characteristics different from today. LGM has been focus for Paleoclimate...
Abstract. Ice cores are exceptional archives which allow us to reconstruct a wealth of climatic parameters as well past atmospheric composition over the last 800 kyr in Antarctica. Inferring variations accumulation rate polar regions is essential both for documenting climate and ice core chronology. On East Antarctic Plateau, so small that annual layers cannot be identified mainly deduced from water isotopic assuming constant temporal relationships between temperature, rate. Such an...
Abstract Variations of Atlantic and Indian monsoon systems since the last glacial period are investigated by comparing eolian fluxes from two marine cores (ODP site 658 off western Africa core 74KL Arabian peninsula) with 2147 hydrological records (lacustrine, palustrine, spring fluvial, arid) gathered over a large continental area extending between 10 30°N across Africa, Arabia India. We show that response to Holocene humid phase in northern tropics strongly differs region another. The is...
Abstract. We describe the creation of boundary conditions related to presence ice sheets, including sheet extent and height, shelf extent, distribution altitude ice-free land, at Last Glacial Maximum (LGM) for use in LGM experiments conducted as part fifth phase Coupled Modelling Intercomparison Project (CMIP5) third Palaeoclimate (PMIP3). The CMIP5/PMIP3 data sets were created from reconstructions made by three different groups, which all obtained using a model-inversion approach but differ...
Abstract. Understanding the ocean circulation changes associated with abrupt climate events is key to better assessing variability and understanding its different natural modes. Sedimentary Pa∕Th, benthic δ13C Δ14C are common proxies used reconstruct past flow rate ventilation. To overcome limitations of each proxy taken separately, a approach produce multiproxy measurements on single sediment core. Yet, can provide conflicting information about circulation. Thus, modelling them in...
Abstract. Understanding the ocean circulation changes associated with last glacial abrupt climate events is key to better assess variability and understand its different natural modes. Sedimentary Pa / Th, benthic δ13C Δ14C are common proxies used reconstruct past flow rate ventilation. To overcome limitations of each proxy taken separately, a approach produce multi-proxy measurements on single sediment core. Yet, can provide conflicting information about circulation. Thus, modelling them in...
Abstract. The mid-Holocene (6000 years ago) is a standard experiment for the evaluation of simulated response global climate models using paleoclimate reconstructions. latest simulations are contribution by Palaeoclimate Model Intercomparison Project (PMIP4) to current phase Coupled (CMIP6). Here we provide an initial analysis and results mid-Holocene. We show that state-of-the-art produce changes broadly consistent with theory observations, including increased summer warming northern...
Abstract. The data request of the Coupled Model Intercomparison Project Phase 6 (CMIP6) defines all quantities from CMIP6 simulations that should be archived. This includes both general interest needed most CMIP6-endorsed Projects (MIPs) and are more specialised only to a single endorsed MIP. complexity has increased early days model intercomparisons, as volume. In contrast with CMIP5, requires distinct sets highly tailored variables saved each than 200 experiments. places new demands on...
Measurements of the air trapped in Antarctic ice cores reveal that atmospheric CO2 concentration (pCO2) during Last Glacial Maximum (LGM) was about 80 ppmv lower than recorded current Holocene interglacial (Bereiter et al., 2015). Studies also show a strong link between pCO2, volume and temperature, suggesting pCO2 as forcing or amplifying factor behind glacial/interglacial cycles (Petit 1999; Parrenin 2013). Despite such importance global climate changes, mechanisms rapid variations...
Abstract. Mediterranean ecosystems are significant carbon sinks but also particularly sensitive to climate change the dynamic in such ecosystem is still not fully understood. An improved understanding of drivers fixation by plants needed better predict how will respond change. Here, for first time, a large dataset collected through FLUXNET network used estimate gross primary production (GPP) different was affected air temperature and precipitation between years 1996 2013. We showed that...