Publicaties
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The biogeochemical role of a microbial biofilm in sea ice: Antarctic landfast sea ice as a case study Vrije Universiteit Brussel
A paradox is commonly observed in productive sea ice in which an accumulation in the macro-nutrients nitrate and phosphate coincides with an accumulation of autotrophic biomass.This paradox requires a new conceptual understanding of the biogeochemical processes operating in sea ice. In this study, we investigate this paradox using three time series in Antarctic landfast sea ice, in which massive algal blooms are reported (with particulate ...
A visual analytic approach for the identification of ICU patient subpopulations using ICD diagnostic codes KU Leuven Universiteit Hasselt
A large number of clinical concepts are categorized under standardized formats that ease the manipulation, understanding, analysis, and exchange of information. One of the most extended codifications is the International Classification of Diseases (ICD) used for characterizing diagnoses and clinical procedures. With formatted ICD concepts, a patient profile can be described through a set of standardized and sorted attributes according to the ...
From ice core to ground-penetrating radar: representativeness of SMB at three ice rises along the Princess Ragnhild Coast, East Antarctica Vrije Universiteit Brussel
The future contributions of the Antarctic Ice Sheet to sea level rise will depend on the evolution of its surface mass balance (SMB), which could amplify/dampen mass losses increasingly observed at the ice sheet's edge. In situ constraints of SMB over annual-to-decadal timescales consist mostly of firn/ice cores that have a surface footprint $\sim$cm$^{2}$. SMB constraints also come from climate models, which have a higher temporal resolution ...
A model of Greenland ice sheet deglaciation constrained by observations of relative sea level and ice extent Vrije Universiteit Brussel KU Leuven
An ice sheet model was constrained to reconstruct the evolution of the Greenland Ice Sheet (GrIS) from the Last Glacial Maximum (LGM) to present to improve our understanding of its response to climate change. The study involved applying a glaciological model in series with a glacial isostatic adjustment and relative sea-level (RSL) model. The model reconstruction builds upon the work of Simpson et al. (2009) through four main extensions: (1) a ...
Basal debris of the NEEM ice core, Greenland: a window into sub-ice-sheet geology, basal ice processes and ice-sheet oscillations Vrije Universiteit Brussel
We present new data from the debris-rich basal ice layers of the NEEM ice core (NW Greenland). Using mineralogical observations, SEM imagery, geochemical data from silicates (meteoric 10Be, εNd, 87Sr/86Sr) and organic material (C/N, δ13C), we characterize the source material, succession of previous glaciations and deglaciations and the paleoecological conditions during ice-free episodes. Meteoric 10Be data and grain features indicate that the ...
Physical and biological controls on DMS,P dynamics in ice shelf-influenced fast ice during a winter-spring and a spring-summer transitions. Vrije Universiteit Brussel
We report the seasonal and vertical variations of dimethylsulfide (DMS) and its precursor dimethylsulfoniopropionate(DMSP) in fast ice at Cape Evans, McMurdo Sound (Antarctica) during the springsummer transition in 2011 and winter-spring transition in 2012. We compare the variations of DMS,P
observed to the seasonal evolution of the ice algal biomass and of the physical properties of the ice cover,with emphasis on the ice texture and brine ...
observed to the seasonal evolution of the ice algal biomass and of the physical properties of the ice cover,with emphasis on the ice texture and brine ...
High Arctic Holocene temperature record from the Agassiz ice cap and Greenland ice sheet evolution Vrije Universiteit Brussel KU Leuven
We present a revised and extended high Arctic air temperature reconstruction from a single proxy that spans the past ∼12,000 y (up to 2009 CE). Our reconstruction from the Agassiz ice cap (Ellesmere Island, Canada) indicates an earlier and warmer Holocene thermal maximum with early Holocene temperatures that are 4–5 °C warmer compared with a previous reconstruction, and regularly
exceed contemporary values for a period of ∼3,000 y. Our ...
exceed contemporary values for a period of ∼3,000 y. Our ...
Ice fraction estimation for ice slurries through impedance measurements Universiteit Gent
A new approach to ice concentration measurement for ice slurries is proposed and investigated in this work. The technique is based on in-line measuring of the impedance of an ice slurry flow. An impedance sensor was designed and built to conduct experiments. The sensor measures the impedance of the ice slurry flow in a frequency domain ranging from 20 to 120 kHz. Using this broad range of measurements, multiple parameters are determined which ...