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  • Data  (2,232)
  • Published Data from (DKRZ) Deutsches Klimarechenzentrum  (1,157)
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  • Data  (2,232)
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  • 1
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    GFZ Thermal Petrophysics Lab – Data Report 2024-01: Thermal properties of the shaly Jurassic (Upper Toarcian) formation at the Tournemire underground research lab (Tournemire, France) (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-06-04
    Description: Abstract
    Description: This data publication provides the results of the investigations and measurements of thermal rock properties conducted on site in the Tournemire field laboratory and at the Thermal Petrophysics Lab at GFZ. The thermal characterization of the clayey Jurassic (Upper Toarcian, ca. 180 My old) is contributing to the site characterization of the Tournemire Underground Research Lab (URL), located in Southern France. This URL is installed in a former railway tun-nel to better understand the physical processes resulting from thermal and hydrau-lic loading in a small fault zone in a highly consolidated shale formation (Bonnelye et al., 2023). At the Tournemire site, faults and fractures of different sizes extend from the surface (sedimentary cover) to the crystalline basement. At one specific gallery (Gallery East 03) installed in the former tunnel, thermally controlled in-situ fluid injection experiments are scheduled on a strike-slip fault zone outcropping at the URL (Bonnelye et al., 2023). In 2022, we visited the URL for baseline characteri-zation of thermal properties and to study the heterogeneity of the clay-dominated formation. Therefore, we took the chance to collect data and samples for a laborato-ry measurement campaign and to measure thermal conductivity in-situ in the tun-nel wall of Gallery East 03. The thermal data shall provide the baseline for the pa-rameterization of future numerical 3D models to better understand the thermal-hydraulic processes related to the experiment. This data publication provides the results of the investigations and measurements conducted on-site in the field la-boratory and at the Thermal Petrophysics Lab at GFZ.
    Keywords: thermal conductivity ; claystone ; host rocks ; URL ; compound material 〉 sedimentary material 〉 sedimentary rock 〉 generic mudstone 〉 mudstone 〉 claystone ; EARTH SCIENCE 〉 SOLID EARTH 〉 ROCKS/MINERALS/CRYSTALS 〉 SEDIMENTARY ROCKS 〉 SEDIMENTARY ROCK FORMATION
    Type: Dataset , Dataset
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  • 2
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    Operational Dataset about drilling in the Moodies Group of the Barberton Greenstone Belt (BASE – Barberton Archean Surface Environments) (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-06-03
    Description: Abstract
    Description: All datasets provided in the operational dataset (Heubeck et al., 2024) of the ICDP project BASE (ICDP 5069) consist of metadata, data and/or images. Here, a summary of explanations of the tables, data and images exported from the database of the project (mDIS BASE) are given and are complemented by additional information on data from measurements done in the laboratory prior to the sampling party. Finally, the sampling data from the first two sampling parties are added. Some basic definitions of identifiers used in ICDP, depths corrections and measurements are also introduced. The BASE (Barberton Archean Surface Environments) scientific drilling project focused on recovering unweathered continuous core through strata of the Paleoarchean Moodies Group (ca. 3.2 Ga), central Barberton Greenstone Belt (BGB), South Africa. They comprise some of the oldest well-preserved sedimentary strata on Earth, deposited within only a few million years in alluvial, fluvial, coastal-deltaic, tidal, and prodeltaic settings; they represent a very-high-resolution record of Paleoarchean surface conditions and processes. Moodies Group strata consist of polymict conglomerates, widespread quartzose, lithic and arkosic sandstones, siltstones, shales, and rare BIFs and jaspilites, interbedded with tuffs and several thin lavas. This report describes operations from preparations to the sampling workshop and complements the related scientific report. Eight inclined boreholes between 280 and 495 m length, drilled during November 2021 through July 2022, obtained a total of 2903 m of curated core of variable quality through steeply to subvertically dipping, in part overturned stratigraphic sections. All drilling objectives were reached. Boreholes encountered a variety of conglomerates, diverse and abundant, mostly tuffaceous sandstones, rhythmically laminated shale-siltstone and banded-iron formations, and several horizons of early-diagenetic sulfate concretions. Oxidative weathering reached far deeper than expected; fracturing was more intense, and BIFs and jaspilites were thicker than anticipated. Two km-long mine adits and a water tunnel, traversing four thick stratigraphic sections within the upper Moodies Group in the central BGB, were also sampled. All boreholes were logged by geophysical instruments. Core was processed (oriented, slabbed, photographed, described, and archived) in a large, publicly accessible hall in downtown Barberton. An exhibition provided background explanations for visitors and related the drilling objectives to the recently established Barberton-Makhonjwa Mountains World Heritage Site. A substantial education, outreach and publicity program addressed the information needs of the local population and of local and regional stakeholders.
    Keywords: Africa ; South Africa ; Barberton ; Early Life Ecology ; Greenstone Belt ; Moodies ; ocean and atmosphere ; oxygen ; ICDP ; International Continental Scientific Drilling Programme ; EARTH SCIENCE 〉 PALEOCLIMATE 〉 LAND RECORDS 〉 BOREHOLES ; EARTH SCIENCE 〉 SOLID EARTH 〉 GEOCHEMISTRY 〉 GEOCHEMICAL PROPERTIES ; Precambrian 〉 Archean
    Type: Dataset , Dataset
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  • 3
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    PRESSurE River Chemistry Time Series (Nepal) (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-05-30
    Description: Abstract
    Description: River water and suspended sediment samples were collected between 2015 and 2018 from the Narayani, Saptakoshi and Sunkoshi rivers in Nepal. Samples formed part of the Perturbations of Earth Surface Processes by Large Earthquakes PRESSurE Project (https://www.gfz-potsdam.de/en/section/geomorphology/projects/pressure/). This project aims to better understand the role of earthquakes on earth surface processes. Hydrological stations were installed on the rivers draining the epicentral area following the April 2015 Gorkha earthquake (Mw 7.9). The stations were operated for four consecutive monsoon seasons. All stations were equipped with river stage height measurements and manned daily for sampling. A small batch of river water samples were also collected from the Narayani River. These samples were collected upstream of Narayanghat using a raft between 2015 and 2017. These samples were collected at varying depths in the river. Dissolved river water ion concentrations (N=672) and sediment-adsorbed cation concentrations (N=74) were determined. Radiogenic strontium isotopes (87Sr/86Sr) of both phases were measured for a small number of paired samples (N=9). Dissolved river water anion concentrations were measured at the GFZ German Research Centre for Geosciences, Potsdam, Germany. Dissolved river water cation concentrations were measured at GFZ German Research Centre for Geosciences, Potsdam, Germany and the Department of Earth Sciences, University of Cambridge, Cambridge, UK. Sediment-adsorbed cation concentrations and radiogenic strontium isotope ratios were measured at the Department of Earth Sciences, University of Cambridge, Cambridge, UK.
    Description: Other
    Description: This data set forms part of the Perturbations of Earth Surface Processes by Large Earthquakes PRESSurE Project (https://www.gfz-potsdam.de/en/section/geomorphology/projects/pressure/). Strong earthquakes cause transient perturbations to the near Earth’s surface system. These include widespread land-sliding, subsequent mass movement, and the loading of rivers with sediments. In addition, brittle-rock deformation occurs during the event, forming cracks that affect rock strength and hydrological conductivity. Often overlooked in the immediate aftermath of an earthquake, these perturbations can represent a major part of the overall disaster with impacts that can persist for years before restoring to background conditions. This relaxation phase is therefore part of seismically induced earthquake changes and needs to be monitored to understand the full impact on the Earth system. The fundamental questions motivating the PRESSurE project are ‘How do earthquakes impact erosion during and following seismic activity?’ and ‘What is the role of earthquakes on Himalayan landscape evolution?’. In early June, shortly after the April 2015 Gorkha earthquake, we installed twelve hydrological stations covering all rivers draining the epicentral area. Each station was equipped for daily river water and suspended sediment sampling. Samples are filtered and packed in Nepal, before being shipped to the sediment lab at GFZ for further analysis (SedLab: https://labinfrastructure.geo-x.net/laboratories/91). The sampling network is complemented by an array of seismometers, repeated satellite image observations, and on-side stage high recording. This array is optimized for the monitoring of Earth surface processes (land-sliding, mass wasting and debris flows) and for the monitoring of properties of the shallow subsurface by coda analysis. The monitoring network is the first and most complete observatory to monitor the perturbation of Earth surface process by a major earthquake.
    Type: Collection , Collection
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  • 4
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    Machine learning based aftershock catalogs of the Mw 7.8, February 6th, 2023, Karamanmaras earthquake (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-05-30
    Description: Abstract
    Description: The dataset contains three seismicity catalogs covering the first 5 days of the aftershock sequence of the Mw 7.8 Karamanmaraş and Mw 7.6 Elbistan earthquakes that occurred in Türkiye on February 6th, 2023. The catalogs are derived from machine learning (ML) approaches operating on continuous data from 38 permanent seismological stations covering the area of the aftershock sequence and span the time interval 06.02.2023-10.02.2023. The seismological stations are operated by AFAD (Disaster and Emergency Management Presidency of Turkey) and KOERI (Kandilli Observatory and Earthquake Research Institute). Automatic P- and S-phase picks were obtained using the deep learning PhaseNet software (Zhu & Beroza, 2019), and either GaMMA (Zhu et al., 2022) or GENIE (McBrearty & Beroza, 2023) routines were used to associate these phases into seismic events. The probabilitic NLLoc earthquake location software (Lomax et al., 2009) was used to produce single event locations and final relative relocations were obtained after applying the hypoDD software (Waldhauser & Ellsworth, 2000). This resulted in two single event location NLLoc aftershock catalogs based on GaMMA and GENIE event association and containing 17,550 and 14,805 event detections in the time interval 06.02.2023 01:18 UTC - 11.02.2023 00:00 UTC, respectively. The hypoDD based catalog of better constrained relative relocations contains 5,215 events. The magnitude range is between M-0.1 and M6.9 with time-variable magnitude of completeness. The catalog covers the area 36.00S-39.00S and 35.40E-40.00E. The full description of the data and methods is provided in the data description file.
    Keywords: East Anatolian Fault Zone ; Kahramanmaraş earthquake ; enhanced seismicity catalog ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 EARTHQUAKES ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 EARTHQUAKES 〉 EARTHQUAKE OCCURRENCES ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 PLATE TECTONICS 〉 PLATE BOUNDARIES
    Type: Dataset , Dataset
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  • 5
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    W isotope, Nd isotope, major and trace element data from the Badampahar and Onverwacht Groups, Kaapvaal and Singhbhum Cratons (2023)
    GFZ Data Services
    Details
    Publication Date: 2024-05-29
    Description: Other
    Description: The DIGIS geochemical data repository is a research data repository in the Earth Sciences domain with a specific focus on geochemical data. The repository archives, publishes and makes accessible user-contributed, peer-reviewed research data in standardised form (EarthChem Team, 2022) that fall within the scope of the GEOROC database. All submissions of new data will be considered for inclusion in the GEOROC database. It is hosted at GFZ Data Services through a collaboration between the Digital Geochemical Data Infrastructure (DIGIS) for GEOROC 2.0 (http://digis.geo.uni-goettingen.de) and the GFZ German Research Centre for Geosciences.
    Description: Abstract
    Description: The dataset contains major and trace element data as well as radiogenic W isotope data for 〉3.5 Ga felsic to ultramafic volcanic rocks from the Kaapvaal and Singhbhum Cratons. For the Kaapvaal Craton additional 143Nd data is provided. Major elements were analysed by XRF at Würzburg University and the School of Geological Sciences, University of KwaZulu-Natal; trace elements by ICP:MS at Georg-August Universität Göttingen, Department for Geochemistry and Isotope Geology; radiogenic W and 143Nd isotopic data were measured by ICP:MS-MC at Georg-August Universität Göttingen, Department for Geochemistry and Isotope Geology. These data are published as a supplement to Messling et al. (submitted), Mobilization of Tungsten in Greenstone Belts of the Archaean Kaapvaal and Singhbhum Cratons, Geochemistry, Geophysics, Geosystems. A subset of these data were previously published in Jodder (2021), The geology of the Daitari Greenstone Belt, Singhbhum Craton, India - insights into early life 3.5 Ga ago, Doctoral thesis, University of Johannesburg, https://hdl.handle.net/10210/477262. This work was funded by the German Research Foundation (DFG Grant WI 3579/3-1).
    Keywords: XRF ; ICPMS ; MC-ICP-MS ; metakomatiite ; metabasalt ; rhyolite ; felsic agglomerate ; quartz schist ; trondhjemite ; EARTH SCIENCE 〉 SOLID EARTH 〉 GEOCHEMISTRY
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  • 6
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    DEEPEN, Western DAS Branch (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-05-28
    Description: Abstract
    Description: From June to August 2021 the DEEPEN project deployed a dense seismic network across the Hengill geothermal area in southwest Iceland to image and characterize faults and high-temperature zones at high resolution. The nodal network comprised 498 geophone nodes spread across the northern Nesjavellir and southern Hverahlíð geothermal fields and was complemented by an existing permanent and temporary backbone seismic network of a total of 44 short-period and broadband stations. In addition, two fiber optic telecommunication cables near the Nesjavellir geothermal power plant were interrogated with commercial DAS-interrogators. The here published dataset contains a subset of the downsampled DAS-recordings from the western fiber optic array. The original data were downsampled from 2000Hz to 250 Hz using the das-convert tool (https://doi.org/10.5880/GFZ.2.1.2021.005). Note that there was a problem with the GNSS timing in the original recorded data which caused significant temporal drift. This has mostly been corrected in the downsampled data, but some residual timing error may exist. Waveform data is available from the GEOFON data centre, under network code 1D, and is fully open.
    Keywords: EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 EARTHQUAKES ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 VOLCANIC ACTIVITY ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS 〉 SEISMOLOGICAL STATIONS ; Passive seismic ; Seismometers ; Velocity ; MiniSEED ; DAS
    Type: Dataset , Seismic Network
    Format: 1700GB
    Format: .mseed
    Format: XML
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  • 7
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    Site amplifications for European stations obtained by a spectral decomposition approach (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-05-28
    Description: Abstract
    Description: This repository contains the site amplification functions obtained by Bindi et al. (2023). The site amplifications were obtained through a Generalized Inversion Technique (GIT) applied to seismic recordings downloaded from EIDA (Strollo et al., 2021) and EarthScope (https://service.iris.edu/) using stream2segment software (Zaccarelli, 2018). We computed the Fourier spectra of S-waves windows considering the square root of the sum of the two horizontal components squared. The site amplifications are relative to the station CH.LSS (station Linth-Limmern of the Swiss network, https://stations.seismo.ethz.ch/en/station-information/station-details/station-given-networkcode-and-stationcode/index.html?networkcode=CH&stationcode=LLS), installed on rock with shear wave velocity averaged over the top 30 m equal to vs30=2925 m/s (Fäh et al. 2009). The site amplification at the reference station LLS is constrained to be equal to 1 for frequencies f below 10 Hz and to the function exp[−0.015π(f−10)] above 10 Hz, to account for near-surface attenuation effects at high frequencies. Details about the decomposition can be found in Bindi et al (2023). The file siteAmp_repo.csv uses as field separator the semicolon (;). It contains: - column freq: values of frequency between 0.5 and 20 Hz; - columns with site amplifications: 3001 columns with column name given by network_station_channel (e.g. GR_MOX_HH indicated station MOX of network GR, channel HH). The R script (R Core Team, 2024) plotRepo.R shows how to read and plot the site amplification for a given station.
    Keywords: Site amplification ; Europe ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 EARTHQUAKES ; geological process 〉 seismic activity 〉 earthquake
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  • 8
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    Drone-based photos, 3D models, DSM and orthomosaics and ground-based catalogues of lava fountain times, shape, and amplitude during the Geldingadalir 2021 eruption, Iceland (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-05-27
    Description: Abstract
    Description: The Geldingadalir 2021 eruption in Iceland started on 19 March and ended on 18 September. It featured nearly 9000 lava fountain episodes of minute to day duration that were all accompanied by seismic tremor. We measured the duration, repose time, tremor amplitude and shape using seismometers from the University of Potsdam. We publish the corresponding catalogs that contain information about these episodes. Periodically, aerial surveys were conducted by the University of Iceland using unoccupied aerial systems (UAS). These surveys lead to digital surface models (DSM), orthomosaics, and 3D models. These products were used to supplement the seismic observations.
    Keywords: eruption ; seismic tremor ; EARTH SCIENCE 〉 HUMAN DIMENSIONS 〉 NATURAL HAZARDS 〉 VOLCANIC ERUPTIONS ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 VOLCANIC ACTIVITY 〉 ERUPTION DYNAMICS ; monitoring 〉 seismic monitoring
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  • 9
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    Demmin, Germany (2015) - a (hyperspectral) dataset for active participation in the HYPERedu MOOC on soil applications (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-05-27
    Description: Abstract
    Description: This dataset accompanying the MOOC on soil applications contains an airborne hyperspectral HySpex image over the study site Demmin in Northern Germany which was recorded in October 2015. The surrounding area of Demmin is characterized by its glacial past and is largely used for agriculture. Here you can find relics of the ice age such as kettle holes - small, completely closed hollow shapes whose formation is attributed to the burial and subsequent thawing of an ice lens. Mostly overgrown nowadays by vegetation, SOC accumulates in these areas and higher contents are measured. The image dataset is fully pre-processed – all non-soil pixels are masked, the spectra were smoothed using a Savitzky-Golay Filter and transformed to first derivatives – and provided in BSQ format. In addition to the HySpex image, this dataset contains a point data shapefile with 27 sampling locations, as well as information on the soil organic carbon (SOC) contents [g/kg]. The dataset is made publicly available as part of the Massive Open Online Course (MOOC) "Beyond the Visible - Imaging Spectroscopy for Soil Applications ", available from Spring 2023. Guidance on how to derive quantitative soil maps (SOC content) using the EnMAP-Box (QGIS plugin) are provided as videos at the HYPERedu YouTube channel, the soil MOOC course pages and the regression workflow documentation.
    Description: Other
    Description: HYPERedu is an education initiative within the Environmental Mapping and Analysis Program (EnMAP), a German hyperspectral satellite mission that aims at monitoring and characterizing the Earth’s environment on a global scale. EnMAP serves to measure and model key dynamic processes of the Earth’s ecosystems by extracting geochemical, biochemical and biophysical variables, which provide information on the status and evolution of various terrestrial and aquatic ecosystems.
    Keywords: hyperspectral ; hyperspectral imagery ; imaging spectroscopy ; HySpex airborne imagery ; Demmin ; Germany ; soil ; SOC ; Earth Remote Sensing Instruments 〉 Passive Remote Sensing 〉 Spectrometers/Radiometers ; EARTH SCIENCE 〉 SPECTRAL/ENGINEERING
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  • 10
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    Cabo de Gata-Nίjar Natural Park, Spain (2005) - a (hyperspectral) dataset for active participation in the HYPERedu MOOC on soil applications (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-05-27
    Description: Abstract
    Description: The dataset contains a subset of an airborne hyperspectral HyMap image over the Cabo de Gata-Nίjar Natural Park in Spain from 15.06.2005, and soil wet chemistry data based on in-situ soil sampling. The Cabo de Gata-Nίjar Natural Park is a semi-arid mediterranean area in Southern Spain, sparsely populated and with a range of landscape patterns. The soils in this area are developed on volcanic and carbonatic bedrocks and are highly variable in their textural and mineralogical composition, offering interesting spectral variability. The airborne survey was acquired during a DLR / HyVista HyEurope campaign. The image dataset is fully processed for atmospheric and geometric correction with PARGE and ATCOR and is provided as orthorectified reflectance in BSQ format. Spatial resolution is 5 m and spectral coverage is 0.45-2.45 μm with 12-17 nm spectral sampling. In addition to the HyMap imagery, this dataset contains two soil reference datasets as CSV files, namely in-situ data for clay content and iron content. The dataset is made publicly available as part of the Massive Open Online Course (MOOC) "Beyond the Visible - Imaging Spectroscopy for Soil Applications ", available from Spring 2024. Guidance on how to derive semiquantitative and quantitative soil maps (clay and iron content) using the EnMAP-Box (QGIS plugin) EnSoMAP tool are provided as videos at the HYPERedu YouTube channel (https://www.youtube.com/@HYPERedu_GFZ/playlists) and the soil MOOC course pages (https://eo-college.org/courses/beyond-the-visible-imaging-spectroscopy-for-soil-applications/).
    Description: Other
    Description: HYPERedu is an education initiative within the Environmental Mapping and Analysis Program (EnMAP), a German hyperspectral satellite mission that aims at monitoring and characterizing the Earth’s environment on a global scale. EnMAP serves to measure and model key dynamic processes of the Earth’s ecosystems by extracting geochemical, biochemical and biophysical variables, which provide information on the status and evolution of various terrestrial and aquatic ecosystems.
    Keywords: hyperspectral ; hyperspectral imagery ; imaging spectroscopy ; HyMap airborne imagery ; Cabo de Gata-Nίjar ; Spain ; Mediterranean ; soil ; clay ; DEM ; Earth Remote Sensing Instruments 〉 Passive Remote Sensing 〉 Spectrometers/Radiometers ; EARTH SCIENCE 〉 SPECTRAL/ENGINEERING
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