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Altena, Bas (author), Kääb, Andreas (author), Wouters, B. (author)In recent years a vast amount of glacier surface velocity data from satellite imagery has emerged based on correlation between repeat images. Thereby, much emphasis has been put on the fast processing of large data volumes and products with complete spatial coverage. The metadata of such measurements are often highly simplified when the...journal article 2022
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Fricker, Helen Amanda (author), Arndt, Philipp (author), Brunt, Kelly M. (author), Datta, Rajashree Tri (author), Fair, Zachary (author), Jasinski, Michael F. (author), Kingslake, Jonathan (author), Magruder, Lori A. (author), Wouters, B. (author)Surface melting occurs during summer on the Antarctic and Greenland ice sheets, but the volume of stored surface meltwater has been difficult to quantify due to a lack of accurate depth estimates. NASA's ICESat-2 laser altimeter brings a new capability: photons penetrate water and are reflected from both the water and the underlying ice; the...journal article 2021
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Pronk, J. B. (author), Bolch, T. (author), King, O. (author), Wouters, B. (author), Benn, D. I. (author)Meltwater from Himalayan glaciers sustains the flow of rivers such as the Ganges and Brahmaputra on which over half a billion people depend for day-to-day needs. Upstream areas are likely to be affected substantially by climate change, and changes in the magnitude and timing of meltwater supply are expected to occur in coming decades. About 10 %...journal article 2021
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van Tiggelen, Maurice (author), Smeets, Paul C. J. P. (author), Reijmer, Carleen H. (author), Wouters, B. (author), Steiner, Jakob F. (author), Nieuwstraten, Emile J. (author), Immerzeel, Walter W. (author), van den Broeke, Michiel R. (author)The aerodynamic roughness of heat, moisture, and momentum of a natural surface are important parameters in atmospheric models, as they co-determine the intensity of turbulent transfer between the atmosphere and the surface. Unfortunately this parameter is often poorly known, especially in remote areas where neither high-resolution elevation...journal article 2021
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Datta, R. T. (author), Wouters, B. (author)We introduce an algorithm (Watta) which automatically calculates supraglacial lake bathymetry and detects potential ice layers along tracks of the ICESat-2 (Ice, Cloud, and Land Elevation Satellite) laser altimeter. Watta uses photon heights estimated by the ICESat-2 ATL03 product and extracts supraglacial lake surface, bottom, and depth...journal article 2021
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Willen, M.O. (author), Broerse, D.B.T. (author), Groh, A. (author), Wouters, B. (author), Kuipers Munneke, P. (author), Horwath, M. (author), van den Broeke, M.R. (author), Schröder, L. (author)Satellite gravimetry and altimetry measurements record gravity and elevation changes, respectively, which are useful for determining mass and volume change of the Antarctic Ice Sheet. Common methods employ products from regional climate modeling and firn modeling to aid interpretation and to link volume changes to mass changes. Estimating...journal article 2021
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King, Michalea D. (author), Howat, Ian M. (author), Candela, Salvatore G. (author), Noh, Myoung J. (author), Jeong, Seongsu (author), Noël, Brice P. Y. (author), van den Broeke, Michiel R. (author), Wouters, B. (author), Negrete, Adelaide (author)The Greenland Ice Sheet is losing mass at accelerated rates in the 21st century, making it the largest single contributor to rising sea levels. Faster flow of outlet glaciers has substantially contributed to this loss, with the cause of speedup, and potential for future change, uncertain. Here we combine more than three decades of remotely...journal article 2020
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Noël, Brice (author), Van Kampenhout, Leonardus (author), Jan Van De Berg, Willem (author), Lenaerts, Jan T.M. (author), Wouters, B. (author), R. Van Den Broeke, Michiel (author)We present a reconstruction of historical (1950–2014) surface mass balance (SMB) of the Greenland ice sheet (GrIS) using a high-resolution regional climate model (RACMO2; ∼ 11 km) to dynamically downscale the climate of the Community Earth System Model version 2 (CESM2; ∼ 111 km). After further statistical downscaling to 1 km spatial resolution,...journal article 2020
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Fettweis, Xavier (author), Hofer, Stefan (author), Krebs-Kanzow, Uta (author), Amory, Charles (author), Aoki, Teruo (author), Berends, Constantijn J. (author), Born, Andreas (author), Box, Jason E. (author), Wouters, B. (author)Observations and models agree that the Greenland Ice Sheet (GrIS) surface mass balance (SMB) has decreased since the end of the 1990s due to an increase in meltwater runoff and that this trend will accelerate in the future. However, large uncertainties remain, partly due to different approaches for modelling the GrIS SMB, which have to weigh...journal article 2020
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- Richter-Menge, Jacqueline (author), Druckenmiller, Matthew L. (author), Andersen, J. K. (author), Andreassen, Liss M. (author), Baker, Emily H. (author), Ballinger, Thomas J. (author), Berner, Logan T. (author), Bernhard, Germar H. (author), Wouters, B. (author) journal article 2020
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Lhermitte, S.L.M. (author), Sun, Sainan (author), Shuman, Christopher (author), Wouters, B. (author), Pattyn, Frank (author), Wuite, Jan (author), Berthier, Etienne (author), Nagler, Thomas (author)Pine Island Glacier and Thwaites Glacier in the Amundsen Sea Embayment are among the fastest changing outlet glaciers in West Antarctica with large consequences for global sea level. Yet, assessing how much and how fast both glaciers will weaken if these changes continue remains a major uncertainty as many of the processes that control their...journal article 2020
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Noël, Brice (author), Jakobs, C. L. (author), van Pelt, W. J.J. (author), Lhermitte, S.L.M. (author), Wouters, B. (author), Kohler, J. (author), Hagen, J. O. (author), Luks, B. (author), Reijmer, C. H. (author), van de Berg, W. J. (author), van den Broeke, M. R. (author)Compared to other Arctic ice masses, Svalbard glaciers are low-elevated with flat interior accumulation areas, resulting in a marked peak in their current hypsometry (area-elevation distribution) at ~450 m above sea level. Since summer melt consistently exceeds winter snowfall, these low-lying glaciers can only survive by refreezing a...journal article 2020
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Sasgen, Ingo (author), Wouters, B. (author), Gardner, Alex S. (author), King, Michalea D. (author), Tedesco, Marco (author), Landerer, Felix W. (author), Dahle, Christoph (author), Save, Himanshu (author), Fettweis, Xavier (author)Between 2003-2016, the Greenland ice sheet (GrIS) was one of the largest contributors to sea level rise, as it lost about 255 Gt of ice per year. This mass loss slowed in 2017 and 2018 to about 100 Gt yr−1. Here we examine further changes in rate of GrIS mass loss, by analyzing data from the GRACE-FO (Gravity Recovery and Climate Experiment –...journal article 2020
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Box, Jason Eric (author), Colgan, William T (author), Røjle Christensen, Torben (author), Schmidt, Niels Martin (author), Lund, Magnus (author), Parmentier, Frans-Jan W (author), Brown, Ross (author), Bhatt, Uma S (author), Wouters, B. (author)Key observational indicators of climate change in the Arctic, most spanning a 47 year period (1971–2017) demonstrate fundamental changes among nine key elements of the Arctic system. We find that, coherent with increasing air temperature, there is an intensification of the hydrological cycle, evident from increases in humidity, precipitation,...review 2019
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Wouters, B. (author), Gardner, Alex S. (author), Moholdt, Geir (author)Glaciers outside of the ice sheets are known to be important contributors to sea level rise. In this work, we provide an overview of changes in the mass of the world's glaciers, excluding those in Greenland and Antarctica, between 2002 and 2016, based on satellite gravimetry observations of the Gravity Recovery and Climate Experiment (GRACE)....journal article 2019
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Lenaerts, J.T.M. (author), Medley, Brooke (author), van den Broeke, Michiel R. (author), Wouters, B. (author)Surface mass balance (SMB) provides mass input to the surface of the Antarctic and Greenland Ice Sheets and therefore comprises an important control on ice sheet mass balance and resulting contribution to global sea level change. As ice sheet SMB varies highly across multiple scales of space (meters to hundreds of kilometers) and time (hourly...journal article 2019
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Groh, Andreas (author), Horwath, Martin (author), Horvath, Alexander (author), Meister, Rakia (author), Wouters, B. (author), Ditmar, P.G. (author), Ran, J. (author), Klees, R. (author), Schrama, Ernst (author)Satellite gravimetry data acquired by the Gravity Recovery and Climate Experiment (GRACE) allows to derive the temporal evolution in ice mass for both the Antarctic Ice Sheet (AIS) and the Greenland Ice Sheet (GIS). Various algorithms have been used in a wide range of studies to generate Gravimetric Mass Balance (GMB) products. Results from...journal article 2019
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Box, Jason E. (author), Colgan, William T. (author), Wouters, B. (author), Burgess, David O. (author), O'Neel, Shad (author), Thomson, Laura I. (author), Mernild, Sebastian H. (author)The Arctic Monitoring and Assessment Program (AMAP 2017) report identifies the Arctic as the largest regional source of land ice to global sea-level rise in the 2003-2014 period. Yet, this contextualization ignores the longer perspective from in situ records of glacier mass balance. Here, using 17 (>55°N latitude) glacier and ice cap mass...journal article 2018
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King, M. D. (author), Howat, I. M. (author), Jeong, S. (author), Noh, M. J. (author), Wouters, B. (author), Noël, B. (author), van den Broeke, M. R. (author)Rapid changes in thickness and velocity have been observed at many marine-terminating glaciers in Greenland, impacting the volume of ice they export, or discharge, from the ice sheet. While annual estimates of ice-sheet-wide discharge have been previously derived, higher-resolution records are required to fully constrain the temporal response of...journal article 2018
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Noël, Brice (author), van den Berg, J.W. (author), Lhermitte, S.L.M. (author), Wouters, B. (author), Machguth, Horst (author), Howat, Ian (author), Citterio, M. (author), Moholdt, G (author), Lenaerts, Jan T M (author), van den Broeke, Michiel R. (author)Melting of the Greenland ice sheet (GrIS) and its peripheral glaciers and ice caps (GICs) contributes about 43% to contemporary sea level rise. While patterns of GrIS mass loss are well studied, the spatial and temporal evolution of GICs mass loss and the acting processes have remained unclear. Here we use a novel, 1 km surface mass balance...journal article 2017