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SICEv2.3.2 Greenland snow and ice broadband albedo and surface optical properties from Sentinel-3’s OLCI at 1000 m resolution, 2017-2023
No full textProcessing scripts:
https://github.com/GEUS-SICE/SICE
https://github.com/GEUS-SICE/pySIC
Greenland Petroleum Seep and Stain Inventory
No full textThis data product is a website. The page you are looking at is just the DOI reference to the website. The website can be found at Greenland Petroleum Seep and Stain Inventory.
The inventory provides an overview over petroleum seeps and stains in Greenland. At present the inventory includes the following features: (1) Oil seeps, (2) Gas seeps, (3) Mud diapirs, pingos and gas-rich springs, (4) Oil stains in volcanic rocks, carbonates and sandstones, (5) Solid macroscopic bitumen, and (6) Fluid inclusions and other evidence of micro-seepage. The inventory comprises detailed information on samples and localities together with description of features and geology and includes references to data, reports and publications. All information is summarised in either a minerals or petroleum systems context. Petroleum seeps and stains have been reported from most Palaeozoic, Mesozoic and Cenozoic basins in Greenland where they add important information on petroleum systems, especially distribution and facies variation of source rocks, petroleum generation and later migration, accumulation, and degradation. The inventory is designed to be updated with additional localities, descriptions and new organic geochemical data
PROMICE perimeter airborne laser and radar altimetry survey
No full textAirborne surveys were carried out in 2007, 2011 and 2015 along the PROMICE perimeter, which approximately circumscribing the 1700 m elevation contour of the Greenland Ice Sheet. Ice-sheet surface elevation was measured by laser altimetry and bedrock elevation was measured by radar sounding. These airborne data files are level-two data products, meaning that along- and across-track averaging has been applied to the primary sensor data
Holocene ecosystem changes at the North Water polynya: marine and lake sediment core data and analysis code
No full textSource data and code share for Ribeiro et al. 2021 "Vulnerability of the North Water ecosystem to climate change", Nature Comunications 12: 447
SICE implementation of the Simple Cloud Detection Algorithm (SCDA) v2.0
No full textThe Programme for Monitoring of the Greenland Ice Sheet (PROMICE) provides surface meteorological and glaciological measurements from widespread on-ice automatic weather stations since mid-2007. In this study, we use 105 PROMICE ice-ablation time series to identify the timing of seasonal bare-ice onset preceded by snow cover conditions. From this collection, we find a bare-ice albedo at ice-ablation onset (here called bare-ice-onset albedo) of 0.565 ± 0.109 that has no apparent spatial dependence among 20 sites across Greenland. We then apply this snow-to-ice albedo transition value to measure the variations in daily Greenland bare-ice area in Sentinel-3 optical satellite imagery covering the extremely low and high respective melt years of 2018 and 2019. Daily Greenland bare-ice area peaked at 153 489 km² in 2019, 1.9 times larger than in 2018 (80 220 km²), equating to 9.0% (in 2019) and 4.7% (in 2018) of the ice sheet area
Metamodel transferability dataset
No full textThe dataset contains all input covariates and target variable for the random forest model presented in the manuscript "A Random Forest Metamodel for Predicting Drainage Fraction and Assessment of Model Transferability to New Spatial Domains" submitted to Water Resources Researc
Replication data for Hydrocarbon Play Maps in the Danish Central Graben
No full textHydrocarbon play maps in the Danish North Sea. Maps in the format of: Arcgis package version 10.
Supplementary files for: Peneplains and tectonics in North-East Greenland after opening of the North-East Atlantic
No full textElevated plateaus with deeply incised valleys characterise elevated passive continental margins (EPCMs) in all climate zones. These features are, however, a topic of debate regarding when and how the large-scale landscapes formed. We have investigated and mapped the partly glaciated landscape of North-East Greenland (70–78°N). The area consists of crystalline basement and Palaeozoic–Mesozoic rift basins, capped by Palaeogene basalts that erupted during the North-East Atlantic break-up. Our stratigraphic landscape analysis reveals a typical EPCM dominated by two elevated erosion surfaces, extending 200 km east–west and 900 km north–south. A low-relief Upper Planation Surface (UPS; c. 2 km above sea level) cuts across basement and Paleogene basalts, indicating that it was graded to base level defined by the Atlantic Ocean in post-basalt times and subsequently uplifted. The UPS formed prior to the deposition of mid-Miocene lavas that rest on it, south of the study area. In the interior basement terrains, a Lower Planation Surface (LPS) forms fluvial valley benches at c. 1 km above sea level, incised below the UPS. The LPS is thus younger than the UPS, which implies that it formed post mid-Miocene. Towards the coast, the valley benches merge to form a coherent surface that define flat-topped mountains. This shows that the LPS was graded to near sea level and was subsequently uplifted. Hence, both the UPS and the LPS formed as peneplains – erosion surfaces graded to base level. The fluvial valley benches associated with the LPS further indicates that full glacial conditions were only established after uplift of the LPS in the early Pliocene (c. 5 Ma). The uplift of the LPS led to re-exposure of a Mesozoic etch surface. We conclude that episodes of late Neogene tectonic uplift shaped the stepped landscape and elevated topography in North-East Greenland
Supplementary files for: Thermo-tectonic development of the Wandel Sea Basin, North Greenland
No full textThe Carboniferous–Palaeogene Wandel Sea Basin of eastern North Greenland (north of 80⁰N, east of 40⁰W) is an important piece in the puzzle of Arctic geology. It is particularly important for understanding how the Paleocene–Eocene convergence between Greenland, the Canadian Arctic and Svalbard relates to the compressional tectonics in the High Arctic, collectively known as the Eurekan Orogeny. Here, we present apatite fission-track analysis (AFTA) and review published vitrinite reflectance data combined with observations from the stratigraphic record to place firmer constraints on the timing of key tectonic events. Our study reveals a long history of episodic burial and exhumation since the collapse of the Palaeozoic fold belts in Greenland. Our results define pre-Cenozoic exhumation episodes in early Permian, Late Triassic, Late Jurassic and mid-Cretaceous times, each involving removal of kilometre-scale sedimentary covers. Mid-Paleocene exhumation defines the timing of compression along the major fault zones during the first stage of the Eurekan Orogeny, after the onset of sea-floor spreading west of Greenland. Regional exhumation that began at the end of the Eocene led to the removal of most of a kilometre-thick cover that had accumulated during Eocene subsidence and involved a major reverse movement along the Harder Fjord Fault Zone, northern Peary Land. These events took place after the end of sea-floor spreading west of Greenland and thus represents post-Eurekan tectonics. Mid–late Miocene exhumation is most likely a consequence of uplift and incision across most of the Wandel Sea Basin study area. The preserved sedimentary sequences of the Wandel Sea Basin represent remnants of thicker strata that likely extended substantially beyond the present-day outline of the basin. We find that the present-day outline of the basin with scattered sedimentary outliers is primarily the result of fault inversion during Eurekan compression followed by deposition and removal of a kilometre-thick overburden
Winter Ice Velocity Mosaics for the Greenland Ice Sheet from Sentinel-1 Edition 1
No full textThe PROMICE Winter Ice Velocity product is a series of ice velocity mosaics for the Greenland Ice Sheet based on the ESA Sentinel-1 SAR offset tracking.
Each mosaic includes all 6 and 12 day pairs between November 1 and February 28 the following year.
The product includes the winters: 2016/2017, 2017/2018, 2018/2019, 2019/2020, 2020/2021
Spatial resolution: 500 m
Each mosaic is supplied as a NetCDF file.
Projection: Polar Stereographic projection (EPSG: 3413)
To see and post comments/recommendations please check out: github.com/GEUS-PROMICE/Sentinel-1_Greenland_Ice_Velocity
When using the dataset please use: Solgaard, Anne; Kusk, Anders, 2021, "Winter Ice Velocity Mosaics for the Greenland Ice Sheet from Sentinel-1 Edition 1", https://doi.org/10.22008/FK2/8BM1IZ, GEUS Dataverse
Literature citation: Solgaard, A., Kusk, A., Merryman Boncori, J. P., Dall, J., Mankoff, K. D., Ahlstrøm, A. P., Andersen, S. B., Citterio, M., Karlsson, N. B., Kjeldsen, K. K., Korsgaard, N. J., Larsen, S. H., and Fausto, R. S.: Greenland ice velocity maps from the PROMICE project, Earth Syst. Sci. Data, 13, 3491–3512, https://doi.org/10.5194/essd-13-3491-2021, 2021.
Please add the following to your acknowledgements: "Ice velocity maps were produced as part of the Programme for Monitoring of the Greenland Ice Sheet (PROMICE) using Copernicus Sentinel-1 SAR images distributed by ESA, and were provided by the Geological Survey of Denmark and Greenland (GEUS) at http://www.promice.dk."
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