Jonas Van Breedam
A5012539967- Cryospheric studies and observations
- Geology and Paleoclimatology Research
- Landslides and related hazards
- Winter Sports Injuries and Performance
- Climate change and permafrost
- Climate variability and models
- Geophysics and Gravity Measurements
- Arctic and Antarctic ice dynamics
- Meteorological Phenomena and Simulations
- Polar Research and Ecology
- Methane Hydrates and Related Phenomena
- Geological Studies and Exploration
- Atmospheric and Environmental Gas Dynamics
- Scientific Research and Discoveries
- Geomagnetism and Paleomagnetism Studies
- Scientific Computing and Data Management
- Pleistocene-Era Hominins and Archaeology
- Paleontology and Stratigraphy of Fossils
- Geological and Geophysical Studies
- Isotope Analysis in Ecology
Vrije Universiteit Brussel
2019-2024
Laboratoire des Sciences du Climat et de l'Environnement
2023
CEA Paris-Saclay
2023
Université de Versailles Saint-Quentin-en-Yvelines
2023
Université Paris-Saclay
2023
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2023
Centre National de la Recherche Scientifique
2023
Bioengineering Center
2015-2020
University of Bremen
2020
Abstract. Ice flow models of the Antarctic ice sheet are commonly used to simulate its future evolution in response different climate scenarios and assess mass loss that would contribute sea level rise. However, there is currently no consensus on estimates balance sheet, primarily because differences representation physical processes, forcings employed initial states models. This study presents results from model simulations 13 international groups focusing during period 2015–2100 as part...
Abstract. The sea level contribution of the Antarctic ice sheet constitutes a large uncertainty in future projections. Here we apply linear response theory approach to 16 state-of-the-art models estimate from basal shelf melting within 21st century. purpose this computation is Antarctica's global rise that arises oceanic forcing and associated melting. Ice considered be major if not largest perturbation sheet's flow into ocean. However, by computing only melting, our study neglecting number...
Abstract Projections of the sea level contribution from Greenland and Antarctic ice sheets (GrIS AIS) rely on atmospheric oceanic drivers obtained climate models. The Earth System Models participating in Coupled Model Intercomparison Project phase 6 (CMIP6) generally project greater future warming compared with previous 5 (CMIP5) effort. Here we use four CMIP6 models a selection CMIP5 to force multiple sheet as part Ice Sheet for (ISMIP6). We find that projected at 2100 model ensemble under...
Abstract. Ice sheet numerical modeling is an important tool to estimate the dynamic contribution of Antarctic ice sea level rise over coming centuries. The influence initial conditions on model simulations, however, still unclear. To better understand this influence, state intercomparison exercise (initMIP) has been developed compare, evaluate, and improve initialization procedures their impact century-scale simulations. initMIP first set experiments Sheet Model Intercomparison Project for...
Abstract The Ice Sheet Model Intercomparison Project for CMIP6 (ISMIP6) is the primary effort of (Coupled Project–Phase 6) focusing on ice sheets, designed to provide an ensemble process‐based projections ice‐sheet contribution sea‐level rise over twenty‐first century. However, behavior Antarctic beyond 2100 remains largely unknown: several instability mechanisms can develop longer time scales, potentially destabilizing large parts Antarctica. Projections evolution until 2300 are presented...
It is generally believed that a large scale Antarctic ice sheet formed at the Eocene-Oligocene transition (34.44-33.65 Ma). However, oxygen isotope excursions during late Eocene (38-34 Ma) and geomorphic evidence of glacial erosion suggest there were ephemeral continental glaciations before Oi-1 event. Here, we investigate evolution over multi-million year timescale up to early Oligocene with most recent estimates carbon dioxide this time period different bedrock elevation reconstructions. A...
Abstract. The Antarctic Ice Sheet represents the largest source of uncertainty in future sea level rise projections, with a contribution to by 2100 ranging from −5 43 cm equivalent under high carbon emission scenarios estimated recent Model Intercomparison for CMIP6 (ISMIP6). ISMIP6 highlighted different behaviors East and West ice sheets, as well possible role increased surface mass balance offsetting dynamic loss response changing oceanic conditions shelf cavities. However, detailed...
Abstract. The emphasis for informing policy makers on future sea-level rise has been projections by the end of 21st century. However, due to long lifetime atmospheric CO2, thermal inertia climate system and slow equilibration ice sheets, global sea level will continue a multi-millennial timescale even when anthropogenic CO2 emissions cease completely during coming decades centuries. Here we present change melting land combined with steric effects next 10 000 years calculated in fully...
Abstract. The surface mass balance (SMB) of a glacier provides the link between and local climate. For this reason, it is intensively studied monitored. However, major efforts are required to determine point SMB at sufficient number locations capture heterogeneity pattern. Furthermore, because time-consuming costly nature these measurements, detailed measurements carried out on only limited glaciers. In study, we investigate how accurately in ablation zone Vadret da Morteratsch Pers...
The Last Glacial Maximum (LGM) Antarctic ice sheet extent is relatively well constrained with an reaching to the continental shelf edge in most places. mass stored and especially loss evolution since more debated. Reconstructed relative sea-level (RSL) variations along coast capture interplay between changes, isostatic response gravitational forces ocean water therefore, can aid reconstruct from LGM present day.Here we use model AISMPALEO that includes a spatially variable Elastic...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Geophysical Research Letters. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]Future sea level change CMIP5 CMIP6 scenarios from Greenland Antarctic ice sheetsAuthorsAntony JPayneiDSophieNowickiAyakoAbe-OuchiCécileAgostaiDPatrick...
Abstract. Ice flow models of the Antarctic ice sheet are commonly used to simulate its future evolution in response different climate scenarios and inform on mass loss that would contribute sea level rise. However, there is currently no consensus estimated balance sheet, primarily because differences representation physical processes forcings employed. This study presents results from 18 simulations 15 international groups focusing during period 2015–2100, forced with Coupled Model...
Abstract. The Antarctic Ice Sheet represents the largest source of uncertainty in future sea level rise projections, with a contribution to by 2100 ranging from -5 43 cm equivalent under high carbon emission scenarios estimated recent Model Intercomparison for CMIP6 (ISMIP6). ISMIP6 highlighted different behaviors East and West ice sheets, as well possible role increased surface mass balance offsetting dynamic loss response changing oceanic conditions shelf cavities. However, detailed...
Abstract Glaciers in the Tien Shan mountains contribute considerably to fresh water used for irrigation, households and energy supply dry lowland areas of Kyrgyzstan its neighbouring countries. To date, reconstructions current ice volume thickness distribution remain scarce, accurate data are largely lacking at local scale. Here, we present a detailed Ashu-Tor, Bordu, Golubin Kara-Batkak glaciers derived from radio-echo sounding measurements modelling. All calibrate three individual models...
Abstract. The sea level contribution of the Antarctic ice sheet constitutes a large uncertainty in future projections. Here we apply linear response theory approach to 16 state-of-the-art models estimate from basal shelf melting within 21st century. purpose this computation is that arises external forcing warming may exert onto sheet. While considered be major if not largest perturbation sheet's flow into ocean, neglecting number processes such as surface mass balance related contributions...
Abstract. Ice sheet numerical modeling is the best approach to estimate dynamic contribution of Antarctica sea level rise over coming centuries. The influence initial conditions on ice model simulations, however, still unclear. To better understand this influence, an state intercomparison exercise (initMIP) has been developed compare, evaluate, and improve initialization procedures their impact century-scale simulations. initMIP first set experiments Sheet Model Intercomparison Project for...
Abstract. The hysteresis behaviour of ice sheets arises because the different thresholds for growth and decline a continental-scale sheet depending on initial conditions. In this study, effect early Cenozoic Antarctic to bedrock elevations is investigated with an improved sheet–climate coupling method that accurately captures ice–albedo feedback. It shown ∼180 ppmv or between 3.5 5 ∘C, only weakly elevation dataset. Excluding isostatic adjustment decreases significantly towards ∼40...
Abstract. On multi-million-year timescales, fully coupled ice sheet–climate simulations are hampered by computational limitations, even at coarser resolutions and when using asynchronous coupling schemes. In this study, a novel method CLISEMv1.0 (CLimate–Ice Sheet EMulator version 1.0) is presented, where Gaussian process emulator applied to the climate model HadSM3 sheet AISMPALEO. The temperature precipitation fields from emulated feed mass balance in sensitivity of evolution over time...
Abstract. The emphasis for informing policy makers on future sea-level rise has been projections by the end of 21st century. However, due to long lifetime atmospheric CO2, thermal inertia climate system and slow equilibration ice sheets, global sea level will continue a multi-millennial timescale even when anthropogenic CO2 emissions cease completely during coming decades centuries. Here we present change melting land combined with steric effects next 10 000 years calculated in fully...
At the Eocene-Oligocene Transition (~34 Ma), ephemeral ice sheets grew into a large continental-scale Antarctic sheet. During late Eocene there is evidence for short-lived, glaciations in benthic oxygen isotope record, as well geomorphic pointing towards large-scale on Antarctica. Here, modelled mean ratio of these early Cenozoic presented. Since isotopes are proxy both deep sea temperature and volume stored land, it possible to estimate change once content sheet known.The strongly dependent...
Abstract. The hysteresis behaviour of ice sheets arises because the different thresholds for growth and decline a continental-scale sheet depending on initial conditions. In this study, effect early Cenozoic Antarctic is investigated with an improved sheet-climate coupling method that accurately captures ice-albedo feedback. It shown about ~180 ppmv or between 3.5 °C 5.5 °C, only weakly bedrock elevation dataset. Excluding solid Earth feedback decreases significantly towards ~40 ppmv,...