A5090961494- Cryospheric studies and observations
- Climate change and permafrost
- Winter Sports Injuries and Performance
- Arctic and Antarctic ice dynamics
- Landslides and related hazards
- Geology and Paleoclimatology Research
- Atmospheric and Environmental Gas Dynamics
- Methane Hydrates and Related Phenomena
- Geological Studies and Exploration
- Phytochemicals and Antioxidant Activities
- Smart Materials for Construction
- Scientific Computing and Data Management
- Drilling and Well Engineering
- Genomics, phytochemicals, and oxidative stress
- Scientific Research and Discoveries
- Plant pathogens and resistance mechanisms
- Geological Modeling and Analysis
Geological Survey of Denmark and Greenland
2009-2024
University of Copenhagen
2016-2023
The Programme for Monitoring of the Greenland Ice Sheet (PROMICE) has been measuring climate and ice sheet properties since 2007. Currently, PROMICE automatic weather station network includes 25 instrumented sites in Greenland. Accurate measurements surface near-surface atmospheric conditions a changing are important reliable present future assessment changes Sheet. Here, we vision, methodology, each link production chain obtaining sharing quality-checked data. In this paper, mainly focus on...
ABSTRACT Glacier surface mass-balance measurements on Greenland started more than a century ago, but no compilation exists of the observations from ablation area ice sheet and local glaciers. Such data could be used in evaluation modelled mass balance, or to document changes glacier melt independently model output. Here, we present comprehensive database The spans 123 1892 2015, contains total ~3000 46 sites, is openly accessible through PROMICE web portal ( http://www.promice.dk ). For each...
Abstract The Greenland ice sheet has been one of the largest sources sea-level rise since early 2000s. However, basal melt not included explicitly in assessments ice-sheet mass loss so far. Here, we present first estimate total and regional produced by recent change through time. We find that sheet’s production is 21.4 +4.4/−4.0 Gt per year, generated friction responsible for about half this volume. melting increased 2.9 ± 5.2 during decade As Arctic warms, anticipate will continue to...
Abstract. We present the Programme for Monitoring of Greenland Ice Sheet (PROMICE) Velocity product (https://doi.org/10.22008/promice/data/sentinel1icevelocity/greenlandicesheet, Solgaard and Kusk, 2021), which is a time series ice velocity mosaics spanning September 2016 through to present. The based on Sentinel-1 synthetic aperture radar data has 500 m grid spacing. A new mosaic available every 12 d spans two consecutive cycles (24 d). made within ∼ 10 last acquisition includes all...
Abstract The long-term response of Greenland’s peripheral glaciers to climate change is widely undocumented. Here we use historical aerial photographs and satellite imagery document length fluctuations >1,000 land-terminating in Greenland over more than a century. We find that their rate retreat the last two decades double twentieth century, indicating ubiquitous transition into new, accelerated state downwasting.
The glaciers of North Greenland are hosting enough ice to raise sea level by 2.1 m, and have long considered be stable. This part is buttressed the last remaining shelves sheet. Here, we show that since 1978, in lost more than 35% their total volume, three them collapsing completely. For floating remain observe a widespread increase shelf mass losses, dominated enhanced basal melting rates. Between 2000 2020, there was melt rates closely follows rise ocean temperature. These showing direct...
Greenland’s peripheral glaciers and ice caps are particularly sensitive to a warming climate often respond more rapidly than the Greenland Ice Sheet. These smaller bodies also play vital role in local ecosystems. End-of-winter distribution of snow cover is key driver glacier mass balance, but predicting accumulation complex terrain challenging due interplay topography wind that influences snowfall deposition re-distribution. Accurate balance estimates must therefore rely on in-situ...
Abstract In order to model and predict future behavior of marine terminating glaciers, it is essential understand the different factors that control a glaciers response climate change. Here we present detailed study asynchronous changes in dynamic four adjacent marine‐terminating at Upernavik Isstrøm (UI), northwest Greenland, between 1992 2013. Velocities were stable for all outlets UI 2005. The northernmost glacier started accelerate thin 2006 continued do so into 2011 after which time...
The Greenland ice sheet has been losing mass in response to increased surface melting (Khan et al. 2015; van den Broeke 2017) as well discharge of from marine terminating outlet glaciers (van 2009; Box 2018). Marine flow the ocean where they lose by e.g. iceberg calving. Currently, loss is largest Arctic contributor global sea-level rise 2009, 2017; Therefore, monitoring changes essential provide policy makers with reliable data.
 There a consensus that most have retreated recent...
Abstract. Climate warming and the resulting acceleration of freshwater discharge from Greenland Ice Sheet are impacting Arctic marine coastal ecosystems, with implications for their biological productivity. To accurately project future ecosystems place recent trends into perspective, palaeo-records essential. Here, we show runoff estimates late 19th century to present day a large sub-Arctic fjord system (Nuup Kangerlua, southwest Greenland) influenced by both marine- land-terminating...
Abstract. We present the Programme for Monitoring of Greenland Ice Sheet (PROMICE) ice velocity product (https://doi.org/10.22008/promice/data/sentinel1icevelocity/greenlandicesheet) (Solgaard and Kusk, 2021)) which is a September 2016 through time series ice-velocity mosaics. The based on Sentinel-1 synthetic aperture radar data has 500 m spatial resolution. A new mosaic available every 12 days span two consecutive cycles (24 days). made within ~10 last acquisition includes all possible 6...
Surface topography within the marginal zone of Greenland Ice Sheet continually evolves in response to varying weather, season, climate and ice dynamics. However, existing sheet Digital Elevation Models (DEMs) usually rely on multi-year data, obscuring these changes over time. We have here developed an annual series (2019-2023) summer DEMs 500m resolution for zone, referred as PRODEMs. Encompassing all outlet glaciers from sheet, PRODEMs result fusing CryoSat-2 radar altimetry ICESat-2 laser...
Abstract. Greenland's peripheral glaciers are losing mass at an accelerated rate and contributing significantly to sea level rise, but only a few direct observations available. In this study, we use the unique combination of high-resolution remote sensing data balance quantify contribution singular avalanche event Freya Glacier (74.38° N, 20.82° W), small (5.5 km2, 2021) mountain glacier in Northeast Greenland. Elevation changes calculated from repeated photogrammetric surveys August 2013...
Terrestrial freshwater runoff strongly influences physical and biogeochemical processes at the fjord scale can have global impacts when considered Greenland scale. We investigate performance of HIRHAM5 regional climate model over catchments delivering to Tyrolerfjord Young Sound by comparing unique Ecological Monitoring database in situ observations from this region. Based on these findings, we estimate discuss fraction originating glacierized non-glacierized land delivered daily between...
Abstract. Tidewater glacier velocity and mass balance are known to be highly responsive terminus position change. Yet it remains challenging for ice flow models reproduce observed margin changes. Here, using the Ice Sheet System Model (Larour et al., 2012), we simulate thickness changes of Upernavik Isstrøm (north-western Greenland) by prescribing a collection 27 positions spanning 164 years (1849–2012). The simulation shows increased during 1930s, late 1970s between 1995 2012 when retreat...
Phytoalexins are antimicrobial plant metabolites elicited by microbial attack or abiotic stress. We investigated phytoalexin profiles after foliar elicitation in the crucifer Barbarea vulgaris and interactions with glucosinolate-myrosinase system. The treatment for was a spray CuCl
Abstract. The climate in Northeast Greenland is shaped by complex topography and interaction with the cryosphere. Since regional ecosystem processes are sensitive to atmospheric stability conditions, it crucial capture this complexity including adequate cryosphere coupling. This study uses an observational dataset from Zackenberg region (Northeast Greenland) investigate local- large-scale factors that determine slope temperature gradient (STG), i.e., along mountain slope. A synthesis of...
Meeting the technical challenges posed by Arctic environment is a key issue in development of Greenland’s economy, particularly light increasing interest developing mineral resources both on- and offshore. This paper describes some results glaciological investigations carried out at Malmbjerg.
The loss of mass from the Greenland ice sheet causes an increasing influx freshwater to Greenlandic fjords and oceans. Freshwater fluxes marine-terminating glaciers are important understand fjord circulation ecosystem dynamics. Here, we present a data set constructed by reformulating existing products into shared temporal spatial framework. We combine three publicly available sets solid-ice discharge (iceberg), liquid-surface runoff (runoff) basal melt cohesive overview flow fjords. also...
Abstract. Greenland's peripheral glaciers are losing mass at an accelerated rate and contributing significantly to sea level rise, but only a few direct observations available. Here, we use the unique combination of high-resolution remote sensing data balance separate quantify contribution singular avalanche event Freya Glacier (74.38° N, 20.82 W), small (5.5 km², 2021) mountain glacier in Northeast Greenland. Elevation changes calculated from repeated photogrammetric surveys on 11th–18th...
Abstract. The negative surface mass balance of glaciers and ice caps under a warming climate impacts local ecosystems, influencing the volume timing water flow in catchments while also contributing to global sea level rise. Peripheral distinct Greenland sheet respond faster change than main sheet. Accurate assessment depends on situ observations near-surface ablation, but very few ablation are freely available for Greenland's peripheral glaciers. transect three automated weather stations A....
Abstract. Surface topography across the marginal zone of Greenland Ice Sheet is constantly evolving in response to changing weather, season, climate, and ice dynamics. However, current digital elevation models (DEMs) for sheet are usually based on data from a multi-year period, thus obscuring these changes over time. Here we present four 500 m resolution summer DEMs (PRODEMs) 2019 through 2022. The PRODEMs cover edge 50 km inland, hence capturing all outlet glaciers. Each PRODEM fusion...
The dynamics of the Greenland Ice Sheet are affected by surface meltwater reaching base ice, altering ice contact with bedrock. Lack understanding this evolution hampers ability to predict effects increasing temperatures on mass balance. Here we present a unique high-resolution study velocity response melting based data from COSMO-SkyMed satellite campaign over Upernavik Isstrøm (Northwest Greenland) for two months around end 2014 melt season. We show that variations, due both short-term...
Abstract. Surface topography across the marginal zone of Greenland Ice Sheet is constantly evolving in response to changes weather, season, climate and ice dynamics. Yet current Digital Elevation Models (DEMs) for sheet are usually based on data from a multi-year period, thus obscuring these over time. We here present four 500-meter resolution annual (2019–2022) summer DEMs (PRODEMs). The PRODEMs cover 50 km wide band edge, they capture all outlet glaciers sheet. Each PRODEM fusion CryoSat-2...