A5007972344- Cryospheric studies and observations
- Winter Sports Injuries and Performance
- Arctic and Antarctic ice dynamics
- Climate change and permafrost
- Remote Sensing in Agriculture
- Landslides and related hazards
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Fire effects on ecosystems
- Meteorological Phenomena and Simulations
- Polar Research and Ecology
- Geology and Paleoclimatology Research
- Atmospheric aerosols and clouds
- Ecosystem dynamics and resilience
- Ecology and Vegetation Dynamics Studies
- Land Use and Ecosystem Services
- Plant Water Relations and Carbon Dynamics
- Hydrology and Watershed Management Studies
- Precipitation Measurement and Analysis
- Remote Sensing and LiDAR Applications
- Atmospheric chemistry and aerosols
- Remote Sensing and Land Use
- Rangeland and Wildlife Management
- Remote-Sensing Image Classification
- Methane Hydrates and Related Phenomena
Delft University of Technology
2016-2025
KU Leuven
2010-2025
Stony Brook University
2024
Research Institute for Nature and Forest
2024
Utrecht University
2017-2022
Swiss Federal Institute for Forest, Snow and Landscape Research
2022
Environmental Analysis and Remote Sensing (Netherlands)
2021
Royal Netherlands Meteorological Institute
2011-2014
Centro de Recursos Educativos Avanzados
2011-2014
University of La Serena
2009-2012
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. 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...
Since the early 1990s, Greenland ice sheet (GrIS) has been losing mass at an accelerating rate, primarily due to enhanced meltwater runoff following atmospheric warming. Here, we show that a pronounced latitudinal contrast exists in GrIS response recent The ablation area north expanded by 46%, almost twice as much south (+25%), significantly increasing relative contribution of total loss. This originates from different change large-scale Arctic summertime circulation, promoting southwesterly...
Significance Pine Island Glacier and Thwaites in the Amundsen Sea Embayment are among fastest changing outlet glaciers Antarctica. Yet, projecting future of these remains a major uncertainty for sea level rise. Here we use satellite imagery to show development damage areas with crevasses open fractures on ice shelves. These first signs their structural weakening as they precondition shelves disintegration. Model results that include mechanism highlight importance shelf stability, grounding...
Abstract The Greenland ice sheet has become one of the main contributors to global sea level rise, predominantly through increased meltwater runoff. drivers runoff, however, remain poorly understood. Here we show that clouds enhance runoff by about one-third relative clear skies, using a unique combination active satellite observations, climate model data and snow simulations. This impact results from cloud radiative effect 29.5 (±5.2) W m −2 . Contrary conventional wisdom, responds this...
Abstract Although the African Great Lakes are important regulators for East climate, their influence on atmospheric dynamics and regional hydrological cycle remains poorly understood. This study aims to assess this impact by comparing a climate model simulation that resolves individual lakes explicitly computes lake temperatures without lakes. The Consortium Small-Scale Modelling in mode (COSMO-CLM) coupled Freshwater Lake (FLake) Community Land Model (CLM) is used dynamically downscale from...
Abstract Aim In order to mitigate the ecological, economical and social consequences of future climate change, we must understand quantify response vegetation short‐term anomalies. There is currently no model that quantifies resistance resilience at a global scale while simultaneously taking variability into account. The goals this study were therefore develop standardized indicator drought temperature anomalies, improve our understanding in drought‐sensitive areas by linking metrics...
Abstract. This study presents a data set of daily, 1 km resolution Greenland ice sheet (GrIS) surface mass balance (SMB) covering the period 1958–2015. Applying corrections for elevation, bare albedo and accumulation bias, high-resolution product is statistically downscaled from native daily output polar regional climate model RACMO2.3 at 11 km. The includes all individual SMB components projected to down-sampled version Ice Mapping Project (GIMP) digital elevation mask. mask better resolves...
Runoff has recently become the main source of mass loss from Greenland Ice Sheet and is an important contributor to global sea level rise. Linking runoff surface meltwater production complex, as can be retained within firn by refreezing or perennial liquid water storage. To constrain these uncertainties, outputs two offline snow/firn models different complexity (IMAU-FDM SNOWPACK) are compared assess sensitivity retention model formulation (e.g., densification, irreducible content, vertical...
Abstract. We present a sensitivity study of the surface mass balance (SMB) Greenland Ice Sheet, as modeled using regional atmospheric climate model, to various parameter settings in albedo scheme. The snow scheme uses grain size prognostic variable and further depends on cloud cover, solar zenith angle black carbon concentration. For control experiment overestimation absorbed shortwave radiation (+6%) at K-transect (west Greenland) for period 2004–2009 is considerably reduced compared...
Abstract Surface meltwater ponding has been implicated as a major driver for recent ice shelf collapse well the speedup of tributary glaciers in northeast Antarctic Peninsula. melt on NAP is impacted by strength and frequency westerly winds, which result sporadic foehn flow. We estimate changes flow associated impact snow melt, density, percolation depth over period 1982–2017 using regional climate model passive microwave data. The first two methods extracts spatial patterns occurrence...
Abstract Weather extremes have harmful impacts on communities around Lake Victoria, where thousands of fishermen die every year because intense night-time thunderstorms. Yet how these thunderstorms will evolve in a future warmer climate is still unknown. Here we show that Victoria projected to be hotspot extreme precipitation intensification by using new satellite-based observations, high-resolution projection for the African Great Lakes and coarser-scale ensemble projections. Land previous...
Abstract. Quantitative assessment of glacier contribution to present-day streamflow is a prerequisite the anticipation climate change impact on water resources in Dry Andes. In this paper we focus two glaciated headwater catchments Huasco Basin (Chile, 29° S). The combination monitoring data for five glaciers (Toro 1, Toro 2, Esperanza, Guanaco, Estrecho and Ortigas) with automatic records at sites coverage 0.4 11 % allows estimation mean annual discharge between 2003/2004 2007/2008...
Abstract Increasing frequency of extreme climate events is likely to impose increased stress on ecosystems and jeopardize the services that provide. Therefore, it major importance assess effects temporal stability (i.e., resistance, resilience, variance) ecosystem properties. Most time series properties are, however, affected by varying data characteristics, uncertainties, noise, which complicate comparison metrics ( ESM s) between locations. there a strong need for more comprehensive...
The Canadian Arctic Archipelago comprises multiple small glaciers and ice caps, mostly concentrated on Ellesmere Baffin Islands in the northern (NCAA, Northern Archipelago) southern parts (SCAA, Southern of archipelago, respectively. Because these are show complex geometries, current regional climate models, using 5‐ to 20‐km horizontal resolution, do not properly resolve surface mass balance patterns. Here we present a 58‐year (1958–2015) reconstruction daily Archipelago, statistically...
Abstract Melting of the Greenland ice sheet (GrIS) and its peripheral glaciers caps (GICs) contributes about 43% to contemporary sea level rise. While patterns GrIS mass loss are well studied, spatial temporal evolution GICs acting processes have remained unclear. Here we use a novel, 1 km surface balance product, evaluated against in situ remote sensing data, identify 1997 (±5 years) as tipping point for balance. That year marks onset rapid deterioration capacity firn refreeze meltwater....
ABSTRACT Mass loss from the Greenland Ice Sheet (GrIS) has accelerated over past two decades, coincident with rapid Arctic warming and increasing moisture transport by atmospheric rivers (ARs). Summer ARs affecting western trigger GrIS melt events, but physical mechanisms through which induce are not well understood. This study elucidates coupled surface–atmosphere processes force analysis of surface energy balance (SEB), cloud properties, local- to synoptic-scale conditions during strong...
Abstract Clouds play a pivotal role in the surface energy budget of polar regions. Here we use two largely independent data sets cloud and downwelling radiation observations derived by satellite remote sensing (2007–2010) to evaluate simulated clouds over both ice sheets oceans state‐of‐the‐art atmospheric reanalyses (ERA‐Interim Modern Era Retrospective‐Analysis for Research Applications‐2) Coupled Model Intercomparison Project Phase 5 (CMIP5) climate model ensemble. First, show that,...
Abstract Compared to other Arctic ice masses, Svalbard glaciers are low-elevated with flat interior accumulation areas, resulting in a marked peak their current hypsometry (area-elevation distribution) at ~450 m above sea level. Since summer melt consistently exceeds winter snowfall, these low-lying can only survive by refreezing considerable fraction of surface and rain the porous firn layer covering zones. We use high-resolution climate model show that modest atmospheric warming mid-1980s...