A5041133130- Cryospheric studies and observations
- Climate change and permafrost
- Geology and Paleoclimatology Research
- Arctic and Antarctic ice dynamics
- Climate variability and models
- Landslides and related hazards
- Oceanographic and Atmospheric Processes
- Winter Sports Injuries and Performance
- Meteorological Phenomena and Simulations
- Geophysics and Gravity Measurements
- Environmental Monitoring and Data Management
- Ocean Waves and Remote Sensing
- Atmospheric aerosols and clouds
- Tree-ring climate responses
- Marine and coastal ecosystems
- Seismic Imaging and Inversion Techniques
- Scientific Computing and Data Management
- Plant Water Relations and Carbon Dynamics
- Geological formations and processes
- Aerospace Engineering and Energy Systems
- Geographic Information Systems Studies
- Marine and fisheries research
- Precipitation Measurement and Analysis
- Ocean Acidification Effects and Responses
- Soil Moisture and Remote Sensing
Royal Netherlands Meteorological Institute
2020-2024
Utrecht University
2011-2022
Hydrologic Research Center
2017-2019
HydroLogic (Netherlands)
2017-2019
ABSTRACT Global-scale 21st-century glacier mass change projections from six published global models are systematically compared as part of the Glacier Model Intercomparison Project. In total 214 annual and area forced by 25 General Circulation Models (GCMs) four Representative Concentration Pathways (RCP) emission scenarios aggregated into 19 regions considered. Global loss all glaciers (outside Antarctic Greenland ice sheets) 2100 relative to 2015 averaged over model runs varies 18 ± 7%...
Abstract The automatic weather station (AWS) on the snout of Vadret da Morteratsch, Switzerland, has delivered a unique 12 year meteorological dataset from ablation zone temperate glacier. This can be used to study multi-annual trends in character surface energy budget. Since 2003 there been substantial darkening glacier tongue due accumulation mineral and biogenic dust. typical albedo summer dropped 0.32 0.15. We have analysed implications lowered for balance annual ablation. For 4 period...
Chapter 1: CMEMS OSR5 1 1.1 IntroductionKarina von Schuckmann and Pierre-Yves Le Traon 1 1.2 Knowledge data for international Ocean governancePaula Kellett, Brittany E. Alexander Jo...
We present a record of almost six years data (2000–2006) from an automatic weather station (AWS) in the ablation zone Midtdalsbreen, glacier southern Norway. Measured incoming longwave radiation is used to estimate cloudiness, revealing that high cloud fractions occur 50% time all seasons. wind speeds and humidity are higher for cloudy conditions, especially winter. Net solar dominates surface energy balance summer, contributing on average 75% melt energy. The turbulent fluxes supply 35%...
The ocean surface wind plays a key role in the exchange of heat, gases and momentum at atmosphere-ocean interface. High-quality records from scatterometers are available 1991 onwards. Care has been taken to account for changes scatterometer instrument types spatial coverage over time, such that these can be used assess past 30 years. On other hand, modelled winds global climate reanalyses (e.g. ERA) suffer density observational timeseries data assimilation process. Still, numerical weather...
Abstract. This study suggests that cold-ice processes may be more widespread than previously assumed, even within temperate glacial systems. We present the first systematic mapping of cold ice at snout glacier Midtdalsbreen, an outlet Hardangerjøkulen icefield (Norway), from 43 line kilometres ground-penetrating radar data. Results show a 40 m wide zone majority snout, where thickness is <10 m. interpret to cold-based across this zone, consistent with basal freeze-on involved in...
Abstract A 5 year record of data from an automatic weather station (AWS) operating in the ablation zone Storbreen, Norway, has been used to calculate local surface energy and mass balance. The AWS observations cover five mass-balance years with unusually strong deficit on Storbreen. average flux ( Q ) contributing melt for period 2001–06 is 113 W m −2 . Of this, net shortwave radiation dominant contributor (92 ), followed by sensible heat (20 latent (9 ). longwave (–6 subsurface (–2...
Abstract. Glaciers respond to mass balance changes by adjusting their surface elevation and area. These properties in turn affect the local area-averaged balance. To incorporate this interdependence response of glaciers climate change, models should include an interactive scheme coupling ice dynamics. In study, a spatially distributed model, comprising energy calculations, was coupled vertically integrated ice-flow model based on shallow approximation. The applied cap Hardangerjøkulen...
Abstract. We compare 5 years of meteorological records from automatic weather stations (AWSs) on Storbreen and Midtdalsbreen, two glaciers in southern Norway, located approximately 120 km apart. The are obtained identical AWSs with an altitude difference m cover the period September 2001 to 2006. Air temperature at AWS locations is found be highly correlated, even seasonal cycle removed. most striking between sites wind climate. Midtdalsbreen much more under influence large-scale circulation...
Abstract Glaciers in northern and southern Norway are subject to different daily seasonal cycles of incoming solar radiation, which is presumably reflected the importance net radiation their surface energy balance. We present a 3 year continuous record from an automatic weather station ablation zone ice cap Langfjordjøkelen, one most northerly glaciers mainland Norway. Despite its location at 70º N, Langfjordjøkelen was found have maritime climate, with annual mean air temperature –1.08C,...
Abstract. Global applications of surface mass balance models have large uncertainties, as a result poor climate input data and limited availability measurements. This study addresses several possible consequences these limitations for the modelled balance. is done by applying simple model that only requires air temperature precipitation data, to glaciers in different regions. In contrast other used global applications, this separately calculates contributions net solar radiation...
Abstract. Understanding of long-term dynamics glaciers and ice caps is vital to assess their recent future changes, yet few reconstructions using flow models exist. Here we present simulations the maritime Hardangerjøkulen cap in Norway from mid-Holocene through Little Ice Age (LIA) day, a numerical model combined with glacier climate reconstructions. In our simulation, under linear forcing, find that grows ice-free conditions its maximum extent during LIA nonlinear, spatially asynchronous...
GROW Observatory is a project funded under the European Union's Horizon 2020 research and innovation program. Its aim to establish large scale (more than 20,000 participants), resilient integrated 'Citizen Observatory' (CO) community for environmental monitoring that self-sustaining beyond life of project. This article describes how initial framework tools were developed evolve, bring together train such community; raising interest, engaging participants, educating support reliable...
Abstract. In this paper, the Copernicus Ocean State Report offers detailed scientific analysis of ocean under climate change, variability, and extremes in northeastern Atlantic adjacent seas. Major results show that seas have experienced consistent warming, with sea surface temperatures increasing at a rate 0.25 ± 0.03 °C per decade since 1982, doubling global average trend. This warming is most pronounced Black Sea, Mediterranean Baltic Sea. Sea levels risen significantly over past 30...
Abstract Digital elevation models of the surface and bed Midtdalsbreen, Norway are used to calculate subglacial hydraulic potential infer drainage system structure for a series water pressure assumptions ranging from atmospheric ice overburden. A distributed degree‐day model is spatial distribution melt on glacier throughout typical summer, which accumulated along various structures fluxes beneath exiting portals different assumptions. In addition, 78 dye‐tracing tests were performed 33...
Abstract. We explore the climatic information contained in record of length fluctuations Glaciar Frías, north Patagonian Andes Argentina. This is one longest and most detailed glacier records southern South America, starting 1639. In order to interpret variations Frías since maximum Little Ice Age extent, we use a combination simplified surface energy-balance model calculate mass balance, flowline account for dynamical response changes forcing. The overall retreat observed over 1639–2009...
Abstract. Clouds are an important component of the climate system, yet our understanding how they directly and indirectly affect glacier melt in different climates is incomplete. Here we analyse high-quality datasets from 16 mountain glaciers diverse around globe to better understand relationships between clouds near-surface meteorology, radiation surface energy balance vary. The seasonal cycle cloud frequency varies markedly sites. During main season at each site, increase cover associated...
Abstract. Climate change has the potential to influence global mean sea level through a number of processes including (but not limited to) thermal expansion oceans and enhanced land ice melt. In addition their contribution change, these two (among others) lead local departures from mechanisms effect on spatial variations in water density transport, usually termed dynamic changes. this study, we focus component that might be given by additional freshwater inflow ocean under scenarios...
Abstract. Global applications of surface mass balance models have large uncertainties, as a result poor climate input data and limited availability measurements. This study addresses several possible consequences these limitations for the modelled balance. is done by applying simple model that only requires air temperature precipitation data, to glaciers in different regions. In contrast other used global applications, this separately calculates contributions net solar radiation...
Abstract. We compare 5 years of meteorological records from automatic weather stations (AWSs) on Storbreen and Midtdalsbreen, two glaciers in southern Norway, located approximately 120 km apart. The are obtained identical AWSs with an altitude difference 130 m cover the period September 2001 to 2006. Air temperature at AWS locations is found be highly correlated, even seasonal cycle removed. most striking between sites wind climate. Midtdalsbreen much more under influence large-scale...
The ocean surface wind plays a key role in the exchange of heat, gases and momentum at atmosphere-ocean interface. It is therefore crucial to accurately represent forcing physical model simulations. A comparison scatterometer observations global numerical weather prediction (NWP) fields revealed substantial local systematic errors vector components spatial derivatives. widespread use NWP winds computation processes implies that these biases propagate into modelled air-sea fluxes, waves...