A5081257608- Cryospheric studies and observations
- Winter Sports Injuries and Performance
- Climate change and permafrost
- Arctic and Antarctic ice dynamics
- Geology and Paleoclimatology Research
- Landslides and related hazards
- Polar Research and Ecology
- Climate variability and models
- Atmospheric and Environmental Gas Dynamics
- Meteorological Phenomena and Simulations
- Geophysics and Gravity Measurements
- High Altitude and Hypoxia
- Atmospheric aerosols and clouds
- Adventure Sports and Sensation Seeking
- Atmospheric Ozone and Climate
- Advanced Image Fusion Techniques
- Aerospace Engineering and Energy Systems
- Advanced Image Processing Techniques
- Smart Materials for Construction
- Science and Climate Studies
- Image and Signal Denoising Methods
- Marine and coastal ecosystems
- Forest ecology and management
- Radiomics and Machine Learning in Medical Imaging
- Atmospheric chemistry and aerosols
Utrecht University
2014-2023
Delft University of Technology
2022
Centre National de la Recherche Scientifique
2018
Laboratoire des Sciences du Climat et de l'Environnement
2018
CEA Paris-Saclay
2018
Université de Versailles Saint-Quentin-en-Yvelines
2018
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2018
Institut des Géosciences de l'Environnement
2018
Université Grenoble Alpes
2018
We use updated drainage inventory, ice thickness, and velocity data to calculate the grounding line discharge of 176 basins draining Antarctic Ice Sheet from 1979 2017. compare results with a surface mass balance model deduce sheet balance. The total loss increased 40 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mo>±</mml:mo></mml:math> 9 Gt/y in 1979–1990 50 14 1989–2000, 166 18 1999–2009, 252 26 2009–2017. In 2009–2017, was dominated by...
Abstract. We evaluate modelled Antarctic ice sheet (AIS) near-surface climate, surface mass balance (SMB) and energy (SEB) from the updated polar version of regional atmospheric climate model, RACMO2 (1979–2016). The referred to as RACMO2.3p2, incorporates upper-air relaxation, a revised topography, tuned parameters in cloud scheme generate more precipitation towards AIS interior modified snow properties reducing drifting sublimation increasing snowmelt. Comparisons model output with several...
Abstract This study evaluates the impact of a recent upgrade in physics package regional atmospheric climate model RACMO2 on simulated surface mass balance (SMB) Antarctic ice sheet. The modelled SMB increases, particular over grounded sheet East Antarctica (+44 Gt –1 ), with small change West Antarctica. mainly results from an increase precipitation, which is explained by changes cloud microphysics, including new parameterization for supersaturation, and large-scale circulation patterns,...
Abstract. The Antarctic ice sheet mass balance is a major component of the sea level budget and results from difference two fluxes similar magnitude: flow discharging in ocean net snow accumulation on surface, i.e. surface (SMB). Separately modelling dynamics SMB only way to project future trends. In addition, studies frequently use regional climate models (RCMs) outputs as an alternative observed fields because observations are particularly scarce sheet. Here we evaluate new simulations...
Abstract. We evaluate modelled Greenland ice sheet (GrIS) near-surface climate, surface energy balance (SEB) and mass (SMB) from the updated regional climate model RACMO2 (1958–2016). The new version, referred to as RACMO2.3p2, incorporates glacier outlines, topography albedo fields. Parameters in cloud scheme governing conversion of condensate into precipitation have been tuned correct inland snowfall underestimation: snow properties are modified reduce drifting melt production percolation...
Abstract We examine data continuity between the Gravity Recovery and Climate Experiment (GRACE) GRACE Follow‐On (FO) missions over Greenland Antarctica using independent from mass budget method, which calculates difference ice sheet surface balance discharge at periphery. For both sheets, we find consistent GRACE/GRACE‐FO time series across gap, continental regional scales, gap is confidently filled with method data. In Greenland, GRACE‐FO reveal an exceptional summer loss of 600 Gt in 2019...
Abstract. Here we present Antarctic snow accumulation variability at the regional scale over past 1000 years. A total of 79 ice core records were gathered and assigned to seven geographical regions, separating high-accumulation coastal zones below 2000 m elevation from dry central Plateau. The composites annual evaluated against modelled surface mass balance (SMB) RACMO2.3p2 precipitation ERA-Interim reanalysis. With exception Weddell Sea coast, low-elevation capture SMB as defined by...
Increasingly rapid ice sheet melting Glaciers on the Southern Antarctic Peninsula have begun losing mass at a and accelerating rate. Wouters et al. documented dramatic thinning of land-based ice, which began in 2009, using satellite altimetry gravity observations. The weakening shelves reduce their buttressing effect, allowing glaciers to flow more quickly sea. Science , this issue p. 899
Abstract. We compare the performance of five different regional climate models (RCMs) (COSMO-CLM2, HIRHAM5, MAR3.10, MetUM, and RACMO2.3p2), forced by ERA-Interim reanalysis, in simulating near-surface surface mass balance (SMB) Antarctica. All simulate Antarctic well when compared with daily observed temperature pressure, nudged matching observations slightly better than free-running models. The ensemble mean annual SMB over ice sheet (AIS) including shelves is 2329±94 Gt yr−1 common...
Abstract. Ice losses from the Greenland and Antarctic ice sheets have accelerated since 1990s, accounting for a significant increase in global mean sea level. Here, we present new 29-year record of sheet mass balance 1992 to 2020 Sheet Mass Balance Inter-comparison Exercise (IMBIE). We compare combine 50 independent estimates derived satellite observations temporal changes flow, volume, Earth's gravity field. Between 2020, contributed 21.0±1.9 mm level, with rate loss rising 105 Gt yr−1...
Abstract. This study presents a high-resolution (∼ 5.5 km) estimate of surface mass balance (SMB) over the period 1979–2014 for Antarctic Peninsula (AP), generated by regional atmospheric climate model RACMO2.3 and firn densification (FDM). is used to force FDM, which calculates processes in snowpack, such as meltwater percolation, refreezing runoff. We evaluate output with 132 situ SMB observations discharge rates from six glacier drainage basins, find that realistically simulates strong...
Abstract This study uses output of a high-resolution (5.5 km) regional atmospheric climate model to describe the present-day (1979–2012) Patagonia, with particular focus on surface mass balance (SMB) Patagonian ice fields. Through comparison available in situ observations, it is shown that able simulate sharp gradients western Patagonia. The southern Andes are an efficient barrier for prevalent flow, generating strong orographic uplift and precipitation throughout entire year. suggests...
Abstract Atmospheric warming is increasing surface melting across the Antarctic Peninsula, with unknown impacts upon glacier dynamics at ice-bed interface. Using high-resolution satellite-derived ice velocity data, optical satellite imagery and regional climate modelling, we show that drainage of meltwater to bed outlet glaciers on Peninsula occurs triggers rapid flow accelerations (up 100% greater than annual mean). This provides a mechanism for this sector Ice Sheet respond rapidly...
Abstract We compare four independent estimates of the mass balance Amundsen Sea Embayment West Antarctica, an area experiencing rapid retreat and loss to sea. use ICESat Operation IceBridge laser altimetry, Envisat radar GRACE time‐variable gravity, RACMO2.3 surface balance, ice velocity from imaging radars, thickness sounders. The methods agree in terms acceleration at regional scale. Over 1992–2013, is 83 ± 5 Gt/yr with 6.1 0.7 2 . During common period 2003–2009, 84 10 16.3 5.6 , nearly 3...
The substantial retreat or disintegration of numerous ice shelves has been observed on the Antarctic Peninsula. shelf in Prince Gustav Channel retreated gradually since late 1980s and broke up 1995. Tributary glaciers reacted with speed-up, surface lowering increased discharge, consequently contributing to sea level rise. We present a detailed long-term study (1993-2014) dynamic response Sjögren Inlet Ice Shelf. analyzed various remote sensing datasets identify reactions loss buttressing...
Abstract The latest polar version of the Regional Atmospheric Climate Model (RACMO2.3) has been applied to Antarctic Peninsula (AP). In this study, authors present results a climate run at 5.5 km for period 1979–2013, in which RACMO2.3 is forced by ERA-Interim atmospheric and ocean surface fields, using an updated AP topography. model are evaluated with near-surface temperature wind measurements from 12 manned automatic weather stations vertical profiles balloon soundings made three...
Abstract The Larsen B ice shelf collapsed in 2002 losing an area twice the size of Greater London to sea (3,000 km 2 ), event associated with widespread supraglacial lake drainage. Here we use optical and radar satellite imagery investigate evolution shelf's lakes decades preceding collapse. We find (1) that spread southward at a rate commensurate meltwater saturation surface; (2) no trend size, suggesting active drainage network which evacuated excess water off shelf; (3) mostly refreeze...
Abstract We compare measurements of the turbulent and radiative surface energy fluxes from an automatic weather station (AWS) on Larsen C Ice Shelf, Antarctica with corresponding three high‐resolution atmospheric models over a 1 month period during austral summer. All produce reasonable simulation (relatively small) at AWS site. However, biases in modeled fluxes, which dominate budget, are significant. There is significant positive bias net shortwave radiation all models, together negative...
Abstract In this study, 3265 multiyear averaged in situ observations and 29 observational records at annual time scale are used to examine the performance of recent reanalysis regional atmospheric climate model products [ERA-Interim, JRA-55, MERRA, Polar version MM5 (PMM5), RACMO2.1, RACMO2.3] for their spatial interannual variability Antarctic surface mass balance (SMB), respectively. Simulated precipitation seasonality is also evaluated using three intercomparison. All qualitatively...
Abstract Surface melt on the coastal Antarctic ice sheet (AIS) determines viability of its shelves and stability grounded sheet, but very few in situ rate estimates exist to date. Here we present a benchmark dataset surface rates energy balance from nine sites eastern Peninsula (AP) Dronning Maud Land (DML), East Antarctica, seven which are located AIS shelves. Meteorological time series eight automatic one staffed weather station (Neumayer), ranging length 15 months almost 24 years, serve...