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SUBWATER domain: Urban catchments and sewer network
No full textThe data sets were developed for a specific model domain of the City of Odense in Denmark based on information from the local water utility company VandCenter Syd A/S in 2019. The domain is referred to as the SUBWATER model domain. The SUBWATER model domain covers approximately 10 km2 of the City of Odense in Denmark. The data set of urban catchments is a shape file of the urban stormwater catchments that drain to the combined storm and sewer network. This file includes the estimated percentage of imperviousness in the attribute column “ ImpArea”. The data set of the sewer network is a shape file of the sewer network within the model domain
Retreat rates of land-terminating glaciers in Greenland in the twentieth and twenty–first centuries
No full textThe dataset contains data published in this paper by Larocca et al.
"Greenland–wide accelerated retreat of peripheral glaciers in the twenty–first century
Two-Way Time (TWT) grids from the Rødby project
No full textGEUS’ gridded interpretations in two-way time of the Rødby structure from the CCS2022–2024 project.
The grids in two-way time from key seismic horizons of this folder are based on 2D seismic data acquired in 2023 (the GEUS2023-ROEDBY survey) and legacy seismic data and published as of December 11th, 2023.
The work will be reported in a GEUS report in 2024. The grids of key horizons are provided for reference of the initial maturation of the structure.
GEUS disclaims any responsibility of the grids, their exactness as well as the applicability of the data to the customer’s purpose. Any use of the interpretations from this folder are not the responsibility of GEUS. Please also refer to GEUS terms of delivery (GEUS_Terms_of_Delivery_20230919.pdf, available in this folder).
The seismic interpreted grids are made in Petrel (2022 version) in two-way time (negative values as standard of Petrel), with a grid size of 250 X 250 meter, and exported from Petrel (Zmap+) as .dat (ASCII) files. All grids are unsmoothed.
Contents of this folder (TWT grids and GEUS’ terms of delivery):
Roedby_Top Oerslev Fm_twt_250x250mGrid_geus2023.dat
Roedby_Top Bunter Sandstone Fm_twt_250x250mGrid_geus2023.dat
Roedby_Top Bunter Shale Fm_twt_250x250mGrid_geus2023.dat
GEUS_Terms_of_Delivery_20230919.pd
Supplementary files for: Petrology of the Skaergaard Layered Series
No full textThe Skaergaard intrusion is a layered, ferrobasaltic intrusion emplaced during the Early Eocene into the rifting volcanic margin of East Greenland. The magma chamber crystallised in response to cooling from the roof and margins upwards and inward, forming upper, marginal and bottom series, the latter referred to as the Layered Series. The phase layering in the bottom series suggests an evolved, olivine-normative tholeiitic melt saturated in plagioclase and olivine, followed by augite, and then simultaneously by ilmenite and magnetite forming primocrysts. Pigeonite appears in the lower parts and continues until the centre of the series. Apatite appears in the upper part concurrently with liquid immiscibility. Cryptic variations of the individual primocrysts record a systematic upward increase in iron and decrease in magnesium for the mafic minerals and a systematic increase in sodium and decrease in calcium for plagioclase. The appearance of pigeonite is caused by reactions and crystallisation in the trapped melt and by subsolidus adjustments without this phase reaching liquidus saturation. The high mode of olivine at the base of the upper part with the appearance of apatite is interpreted to mark the onset of liquid immiscibility. This may have led to the separation of conjugate melts with granophyre migrating upward and the basic component largely staying stationary or sinking. Petrologic and geochemical observations indicate differentiation in the lower part of the intrusion, principally controlled by crystal fractionation with the efficiency of fractionation controlled by the evolution and escape of liquid from the solidifying mush. During the final stages of solidification, the onset of liquid immiscibility and termination of melt convection impeded differentiation. Modelling by perfect Rayleigh fractionation shows that major and included trace elements conform reasonably to observations, while excluded elements deviate from model predictions. This decoupling is caused by the mobility of a granophyre component formed in the trapped melt and in the main residual magma chamber. Consequently, the sampled gabbros may not be representative of the final solid-melt mush. By restoring the gabbros to their original mush compositions, it is possible to constrain granophyre migration pathways. We suggest that the granophyre formed in the trapped melt in the lower part of the intrusion mostly migrated laterally through pressure release pathways to form lenses and pockets with only limited upward migration into the main magma reservoir. Near the end stage of differentiation, the residual magma exsolved and formed complex mixtures of ferrobasaltic and granophyric melts. Estimates predict that a substantial amount of the granophyric melt penetrated as sills into the downward crystallising, upper part of the body as well as into the host rocks. The redistribution of granophyric melts within the solidifying crystal mush complicates predictions of trapped-melt content and mass-balance calculations but helps to explain apparent decoupling of included and excluded trace elements, especially towards the end stages of evolution. Final crystallisation was controlled mostly by in situ crystallisation leaving complex mixtures of ferrodiorite and granophyre components
Geochemical analyses of Soil samples from Greenland
No full textSamples of surface material, i.e. stream sediment, soil, and scree have been collected over large parts of Greenland from 1974 onwards mainly as part of mineral exploration programmes and more broadly for geochemical mapping by means of stream sediment (Steenfelt 1999, 2001). Following various sample preparation procedures, like drying and screening, making concentrates of heavy minerals from stream sediment or soil, certain fractions of the samples have been chemically analysed at diverse laboratories where a range of analytical methods were applied as they became available over the years. The present dataset contains the analytical data from soil samples as they were received from the laboratories together with administrative data, including sample location and grain-size fraction analysed.
Many samples have been analysed at more than one laboratory and by more than one method and the analytical data for each sample and grain size fraction are listed lab by lab and method by method in the same row. Five samples are used in the Geochemical Atlas of Stream sediment samples of South-West Greenland (Steenfelt, 1999). 204 samples from North Greenland have been used in the Geochemical Atlas of Stream sediment samples for North Greenland (Thrane 2011). In addition soil samples were collected in the SEGMENT project (Kolb et al. 2016
Greenland Ice Sheet Surface Elevation Change
No full textDescription
Annual (April to April) elevation change rates of the Greenland Ice Sheet from April 2011 to April 2020 from CryoSat-2, ICESat-2 and NASA’s ATM flights on a 1x1 km grid.
Methods
We have used radar altimetry data from ESA’s Earth Explorer CryoSat-2 mission (Wingham et al., 2006) to estimate annual mass changes of the GrIS from April 2011 to April 2020. We supplemented CryoSat-2 data with laser altimetry observations from NASA’s Operation IceBridge Airborne Topographic Mapper (ATM) flights from April 2011 to April 2019 (Studinger et al., 2020). NASA ended its Operation IceBridge measurement over Greenland in spring 2019, so to fill the gap in laser altimetry data, we used Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) data from April 2019 to April 2020.
We applied corrections for the Earth’s immediate elastic response to contemporary ice mass changes and a correction for glacial isostatic adjustment (GIA) using a recent model entitled “GNET-GIA” (Khan et al., 2016). We converted the observed ice volume changes to mass changes and considered firn compaction obtained using the Regional Atmospheric Climate Model (RACMO2.3p2) (Ligtenberg et al., 2018). Data is analyzed in Khan et al. 2022.
References
Khan, S. A., Bamber, J. L., Rignot, E., Helm, V., Aschwanden, A., Holland, D. M., et al. (2022). Greenland mass trends from airborne and satellite altimetry during 2011–2020. Journal of Geophysical Research: Earth Surface, 127, e2021JF006505.
Khan, S. A. et al. (2016). Geodetic measurements reveal similarities between post-Last Glacial Maximum and present-day mass loss from the Greenland ice sheet. Sci. Adv. 2, e1600931, https://doi.org/10.1126/sciadv.1600931
Ligtenberg, S. R. M., Kuipers Munneke, P., Noël, B. P. Y., and van den Broeke, M. R. (2018). Brief communication: Improved simulation of the present-day Greenland firn layer (1960–2016), The Cryosphere, 12, 1643–1649, https://doi.org/10.5194/tc-12-1643-2018.
Studinger, M. (2014), updated 2020. IceBridge ATM L2 Icessn Elevation, Slope, and Roughness, Version 2. [2011-2019]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center, https://doi.org/10.5067/CPRXXK3F39RV
Wingham, D. J., Francis, C. R., Baker, S., Bouzinac, C., Brockley, D., et al. (2006). CryoSat: A mission to 705 determine the fluctuations in Earth’s land and marine ice fields. In M. Singh, RP and Shea (Ed.), Natural Hazards and Oceanographic processes from satellite data, 37, pp. 841–871. Elsevier science ltd. https://doi.org/10.1016/j.asr.2005.07.02
Two-Way Time (TWT) grids from the Gassum project
No full textGEUS’ gridded interpretations in two-way time of the Gassum structure from the CCS2022–2024 project.
The grids in two-way time (TWT) from key seismic horizons of this folder are based on 2D seismic data acquired in 2023 (the GEUS2023-GASSUM survey and the reprocessing GEUS2023-GASSUM-RE2023) and legacy seismic data and published as of date: August 29th, 2024. Note that the present version of the interpretations replaces a previous version published on December 13th, 2023.
The work is finalised and reported in a published GEUS report (see reference below). The grids of key interpretations are provided for reference of the initial maturation of the structure.
GEUS disclaims any responsibility of the grids, their exactness as well as the applicability of the data to the customer’s purpose. Any use of the interpretations from this folder are not the responsibility of GEUS. Please also refer to GEUS terms of delivery (GEUS_Terms_of_Delivery_20230919.pdf, available in this folder).
The seismic interpreted grids are made in Petrel (2022 version) in two-way time (negative values), with a grid size of 250 x 250 meter, smoothed (with one iteration indicated by ‘1xsm’ in filename and filter width 5) and exported from Petrel (Zmap+) as .dat (ASCII) files
Two-Way Time (TWT) grids from the Stenlille project
No full textGEUS’ gridded interpretations in two-way time of the Stenlille structure from the CCS2022–2024 project.
The grids in two-way time from key seismic horizons of this folder are based on 2D seismic data acquired in 2022 (the GEUS2022-STENLILLE survey) and legacy seismic data and published as of date: November 20th, 2023.
The work is finalized and reported in a published GEUS report (see reference with link below) and the grids of key interpretations are provided for reference of the initial maturation of the structure.
The seismic interpreted grids are made in Petrel (2022 version) in two-way time (negative values as standard of Petrel), with a grid size of 250 X 250 meter, smoothed (1 Iiteration: ‘1xsm’ in filename), and exported from Petrel (Zmap+) as .dat (ASCII) files.
GEUS disclaims any responsibility of the grids, their exactness as well as the applicability of the data to the customer’s purpose. Any use of the interpretations from this folder are not the responsibility of GEUS
DK-model HIP - modelsetup 500- and 100m (DK4)
No full textThis .zip file contains DK-model HIP in 500 and 100m resolution. Simulated results with this model are shared and displayed at HIP and KAMP portals.
GEUS har ophavsretten til DK-modellen
Vi ønsker, at modellen bruges bredt ved løsning af opgaver eller nye undersøgelser, og giver derfor alle brugsret til modellen og data på følgende vilkår:
1.GEUS angives som kilde.
2.Brugen sker på eget ansvar, og dette skal fremgå overfor brugerens samarbejdspartnere.
3.For at sikre modellens udvikling informeres GEUS pr. email: [email protected] i tilfælde, hvor der sker ændringer i modelkonceptet eller justeringer af den konceptuelle model (herunder den hydrostratigrafiske model).
4.Brugeren accepterer endvidere, at GEUS benytter sådanne ændringer/justeringer til en fremtidig opdatering af DK-modellen.
National Vandressource Model udvikles og vedligeholdes løbende. Hvis man vil benytte versioner, der endnu ikke er frigivet, kan man henvende sig til os og få dem udleveret på ad hoc-basis.
Det skal bemærkes, at DK-model HIP primært er udviklet og kalibreret til at simulere det terrænnære grundvand og således ikke uden videre kan forventes at kunne bruges i vandressource-sammenhænge
