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  • Data  (1,062)
  • Published Data from GFZ  (1,062)
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  • 1
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    Tsunami flow depth in Lima/Callao caused by a historic event for varying bottom roughness simulated with the models Tsunami-HySEA and TsunAWI (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-05-08
    Description: Abstract
    Description: This data collection contains inundation maps in Lima and Callao (Peru) based on tsunami simulations with two numerical wave propagation and run-up models (Tsunami-HySEA and TsunAWI) for a range of Manning values between 0.015 and 0.06, where constant values were applied in the whole model domain. The simulations were carried out in the framework of the RIESGOS project (https://www.riesgos.de/en/). The source is based on the historic event from October 1746, the parameters are derived from the study Jimenez et al. (2013). The moment magnitude is prescribed to Mw 9.0, the source area is split into five sub-faults, with inhomogeneous slip distribution and static deformation at time zero (this means no kinematic source model). The flow depth distribution in Lima/Callao after four hours simulation time obtained by the two models is interpolated to raster files and provided in geoTIFF format.
    Keywords: numerical modelling ; tsunami inundation ; Nonlinear prosesses ; bottom roughness ; Callao ; Peru ; EARTH SCIENCE 〉 OCEANS 〉 OCEAN WAVES 〉 TSUNAMIS ; EARTH SCIENCE SERVICES 〉 DATA ANALYSIS AND VISUALIZATION ; environmental data ; experiment 〉 simulation 〉 modelling
    Type: Dataset , Dataset
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    DATA GFZ
  • 2
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    Bohrlochgeophysikalische Messungen an den Geothermiebohrungen Gt Khn 1/88 und Gt Khn 2/87 (Karlshagen, MV) (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-05-08
    Description: Abstract
    Description: In diesem Bericht werden die durch das GFZ Potsdam am 29. und 30. November 2023 durchgeführte bohrlochgeophysikalische Messungen in den Bohrungen Gt Khn 1/88 und Gt Khn 2/87 in Karlshagen (Mecklenburg-Vorpommern) dokumen-tiert. Die Messungen wurden mit dem Ziel der Gewinnung hochaufgelöster und un-gestörter Temperatur-Tiefen-Profile durchgeführt. Die Stillstandszeiten seit Erstel-lung liegen bei mehreren Jahrzehnten; jene seit letzter Befahrung bei fünfzehn Jahren, weshalb von ungestörten Gebirgstemperaturen ausgegangen werden kann. In der Bohrung Gt Khn 2/87 wurde bei 1786,5 m Teufe eine Temperatur von 57,8 °C, welches einem mittleren Temperaturgradienten von 27,8 °C/km entspricht, ge-messen. Die Bohrung Gt Khn 1/88 konnte bis zu einer Teufe von 325,1 m befahren werden, die gemessene Temperatur betrug 16,2 °C, der entsprechende mittlere ge-othermische Gradient beträgt ca. 23,6 °C/km. This report documents the borehole geophysical logging performed by GFZ Potsdam in the Gt Khn 1/88 and Gt Khn 2/87 boreholes in Karlshagen (Mecklenburg-Western Pomerania) on the 29th and 30th of November 2023. The measurements were conducted to achieve high-resolution and undisturbed temperature-depth pro-files. The shut-in times since the boreholes were drilled are several decades; the shut-in time since last activities in the boreholes are in the order of 15 years. There-fore, undisturbed formation temperatures can be expected in the boreholes. In the Gt Khn 2/87 borehole, a temperature of 57.8 °C was measured at a depth of 1786.5 m, which corresponds to an average temperature gradient of 27.8 °C/km. The Gt Khn 1/88 borehole could be logged to a depth of 325.1 m and the measured temperature at this depth was 16.2 °C, corresponding to an average geothermal gradient of approx. 23.6 °C/km.
    Keywords: borehole logging ; undisturbed formation temperature ; North German Basin ; Bohrlochmessungen ; ungestörte Formationstemperaturen ; Norddeutsches Becken ; EARTH SCIENCE 〉 SOLID EARTH 〉 GEOTHERMAL DYNAMICS 〉 GEOTHERMAL TEMPERATURE ; EARTH SCIENCE 〉 SOLID EARTH 〉 GEOTHERMAL DYNAMICS 〉 GEOTHERMAL TEMPERATURE 〉 TEMPERATURE PROFILES
    Type: Dataset , Dataset
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    DATA GFZ
  • 3
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    Catalogues of bulge and fountain formation at Strokkur geyser in 2017, 2020 and 2022: Heights, rising speeds and seismic signal (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-05-08
    Description: Abstract
    Description: Strokkur is a pool geyser in southwest Iceland that erupts every 3.7 minutes. Eruptions start with a blue water bulge that soon turns white (bulge phase) before the water bubble bursts into a jetting water fountain (jet phase). We measured the bulge rising velocity and height and fountain rising velocity and height using video cameras and drones from GFZ and the accompanying ground motion using seismometers from the University of Potsdam. We publish the derived products from video data and seismic data here.
    Keywords: geyser ; eruption ; geothermal ; geothermal tremor ; Earth Remote Sensing Instruments 〉 Passive Remote Sensing 〉 Photon/Optical Detectors 〉 Cameras 〉 VIDEO CAMERA ; EARTH SCIENCE 〉 SOLID EARTH 〉 GEOTHERMAL DYNAMICS ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 VOLCANIC ACTIVITY 〉 ERUPTION DYNAMICS ; science 〉 natural science 〉 earth science 〉 geophysics
    Type: Dataset , Dataset
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  • 4
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    Major and trace element concentrations in hydrological Critical Zone compartments in the Conventwald (Black Forest, Germany) (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-05-03
    Description: Abstract
    Description: This dataset contains element concentrations of six different hydrological compartments sampled on a daily basis over the course of one year in two neighboured first order headwater catchments located in the Conventwald (Black Forest, Germany). Critical Zone water compartments include above-canopy precipitation (bulk precipitation including rainwater, snow and fog water), below-canopy precipitation (throughfall), subsurface flow from three distinct soil layers (organic layer, upper mineral soil, deep mineral soil), groundwater, creek water and spring water. Element concentrations include major elements (Ca, K, Mg, Na, Si, S), trace elements (Al, Ba, Cr, Cu, Fe, Li, Mn, P, Sr, Zn), anion (Cl), and dissolved organic elements (DOC, DON). The data were used to explore concentration (C) - discharge (Q) relationships and to calculate short-term element-specific chemical weathering fluxes, which were compared with previously published long-term element-specific chemical weathering fluxes. The ratio of both weathering fluxes, described by the so-called “Dissolved Export Efficiency” (DEE) metric revealed deficits in the stream dissolved load. These deficits were attributed to colloid-bound export and either storage in re-growing forest biomass or export in biogenic particulate form. Tables supplementary to the article, including data quality control, are provided in .pdf and .xlsx formats. In addition, data measured in the course of the study are also provided as machine readable ASCII files.
    Keywords: Critical Zone ; Major element concentration ; Trace element concentration ; Anion concentration ; Dissolved organic element concentration ; Stream water ; Groundwater ; Subsurface flow ; Throughfall ; Precipitation ; Spring water ; Time series ; EARTH SCIENCE 〉 TERRESTRIAL HYDROSPHERE 〉 GROUND WATER 〉 GROUNDWATER CHEMISTRY ; EARTH SCIENCE 〉 TERRESTRIAL HYDROSPHERE 〉 SURFACE WATER 〉 DISCHARGE/FLOW ; EARTH SCIENCE 〉 TERRESTRIAL HYDROSPHERE 〉 SURFACE WATER 〉 SURFACE WATER CHEMISTRY ; EARTH SCIENCE 〉 TERRESTRIAL HYDROSPHERE 〉 WATER QUALITY/WATER CHEMISTRY 〉 NUTRIENTS ; EARTH SCIENCE 〉 TERRESTRIAL HYDROSPHERE 〉 WATER QUALITY/WATER CHEMISTRY 〉 TRACE METALS
    Type: Dataset , Dataset
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    DATA GFZ
  • 5
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    Preprint: Understanding the consequences of refaunation in coexistence landscapes: integrating social and ecological dimensions (2024)
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    Details
    Publication Date: 2024-05-03
    Description: Abstract
    Description: Human-wildlife conflict poses a significant challenge to 21st-century conservation, with a limited understanding of these interactions within the broader social and ecological context of coexistence. Specifically, the impact of large-scale refaunation efforts on social-ecological dynamics in landscapes shared by humans and wildlife remains poorly understood. This study aims to enhance this understanding by jointly analyzing the consequences of refaunation involving wildlife and cattle in a mixed-use landscape in sub-Saharan Africa. Applying an interdisciplinary approach encompassing ecology, soil science, agricultural economics, and environmental anthropology, we reconstruct the coupling processes in social-ecological systems triggered by refaunation over the last five decades in Namibia&039;s portion of the Kavango-Zambezi Transfrontier Conservation Area (KAZA TFCA). To assess ecological impacts of refaunation with cattle or elephants, space-for-time substitutions are used. The findings demonstrate that post-1960s increases in cattle numbers, and the surge in wildlife numbers since the 1990s have shaped the coexistence landscape. Elephant refaunation positively impacted herbaceous vegetation and soil conditions at intermediate elephant densities but negatively affected vegetation at higher densities. Wildlife refaunation, achieved through conservation and tourism, reduced income inequality. However, this effect was outweighed by the concentration of wealth among affluent cattle owners. Increasing rural inequality contributed challenges of local resource governance. Our study highlights that refaunation has profound ecological and socio-economic repercussions, challenging existing forms of resource governance in KAZA-TFCA and similar coexistence landscapes in Africa, and emphasizing the need for further research on the simultaneous increase of wildlife and cattle and its socio-ecological consequences.
    Description: Other
    Description: Article impact statement: Simultaneous refaunation with cattle and elephants poses both ecological and governance challenges, emphasizing the need for balanced conservation policies.
    Keywords: Ecology ; Environment ; Carbon ; Conservation Areas ; Ecology ; National Park ; Vegetation Structure ; Wildlife ; Livestock Grazing ; Future-making ; Economy ; Anthropology ; Human-Environment Interactions ; Tree-Grass Interactions ; Rewilding ; Refaunation
    Type: DataPaper , Scientific Publication
    Format: PDF
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    DATA GFZ
  • 6
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    The Uruguayan gravimetric quasi-geoid: UruQGeoide110 (2023)
    GFZ Data Services
    Details
    Publication Date: 2024-05-02
    Description: Abstract
    Description: The Uruguayan gravimetric quasi-geoid model UruQGeoide110 was calculated by the Military Geographic Institute (IGM) in 2023. The extent is from 29.5° S to 35.5° S in latitude, and 52.5° W to 59.5° W in longitude, covering parts of Argentina and Brazil, with a grid resolution of 1´ x 1´. The geodetic reference system is SIRGAS ROU-98 (the reference ellipsoid is GRS80). The model is a combination of the EIGEN-6C4 geopotential model up to degree and order of 720, 10,429 land gravimetric stations plus 10,089 free air gravity anomalies in marine areas, based on the DTU13 model. The terrain data at the final 90 m resolution was taken from a 2017 Lidar survey in Uruguay with a 2.5 m initial resolution and SRTM (V2) for the external terrestrial data. The DT18 bathymetry model was used for the marine areas. Due to the total terrain data points (about 104 million), the overall area was divided into 4 overlapped blocks in the framework of the remove-compute-restore procedure. The reduced height anomalies were computed from the reduced gravity anomalies with Stokes 1D FFT and Wong Gore´s kernel modification (170-180 degrees) and the quasi-geoid model was finally obtained by adding back the residual terrain model effects and the contribution of the global geopotential model. The geoid model is provided in ISG format 2.0 (ISG Format Specifications), while the file in its original data format is available at the model ISG webpage.
    Description: Other
    Description: The International Service for the Geoid (ISG) was founded in 1992 (as International Geoid Service - IGeS) and it is now an official service of the International Association of Geodesy (IAG), under the umbrella of the International Gravity Field Service (IGFS). The main activities of ISG consist in collecting, analysing and redistributing local and regional geoid models, as well as organizing international schools on the geoid determination (Reguzzoni et al., 2021).
    Keywords: Geodesy ; Geoid model ; ISG ; Fast Fourier Transform ; Wong-Gore Stokes kernel modification ; Uruguay ; EARTH SCIENCE 〉 SOLID EARTH 〉 GEODETICS 〉 GEOID CHARACTERISTICS ; EARTH SCIENCE 〉 SOLID EARTH 〉 GRAVITY/GRAVITATIONAL FIELD 〉 GRAVITY
    Type: Dataset , Dataset
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    DATA GFZ
  • 7
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    The Uruguayan hybrid geoid: IGM110 (2023)
    GFZ Data Services
    Details
    Publication Date: 2024-05-02
    Description: Abstract
    Description: The official Uruguayan geoid model, called IGM110, was calculated by the Military Geographic Institute (IGM) in 2023 and consists of a grid of 1´ x 1´ geoidal undulations with a total of 151,981 points. The geodetic reference system is SIRGAS ROU-98 (the reference ellipsoid is GRS80). The extent is from 29.5° S to 35.5° S in latitude, and 52.5° W to 59.5° W in longitude, covering parts of Argentina and Brazil. The model is a combination of the EIGEN-6C4 geopotential model up to degree and order of 720, 10,429 land gravimetric stations plus 10,089 free air gravity anomalies in marine areas, based on the DTU13 model. The terrain data at the final 90 m resolution was taken from a 2017 Lidar survey in Uruguay with a 2.5 m initial resolution and SRTM (V2) for the external terrestrial data. The DT18 bathymetry model was used for the marine areas. Due to the total terrain data points (about 104 million), the overall area was divided into 4 overlapped blocks in the framework of the remove-compute-restore procedure. The reduced height anomalies were computed from the reduced gravity anomalies with Stokes 1D FFT and Wong Gore´s kernel modification (170-180 degrees). After adding back the residual terrain model effects and the contribution of the global geopotential model, the obtained quasi-geoid was transformed into a geoid model via Bouguer anomalies, even if the difference between the two models is just a few mm. A comparison with 51 GNSS/levelling stations shows a standard deviation of 10 cm. The resulting geoid was also adapted by a bias and a tilt to the national vertical system, Cabildo 1948, by fitting GNSS/levelling observations, with a mean of 1 cm and a standard deviation of 7 cm. The geoid model is provided in ISG format 2.0 (ISG Format Specifications), while the file in its original data format is available at the model ISG webpage.
    Description: Other
    Description: The International Service for the Geoid (ISG) was founded in 1992 (as International Geoid Service - IGeS) and it is now an official service of the International Association of Geodesy (IAG), under the umbrella of the International Gravity Field Service (IGFS). The main activities of ISG consist in collecting, analysing and redistributing local and regional geoid models, as well as organizing international schools on the geoid determination (Reguzzoni et al., 2021).
    Keywords: Geodesy ; Geoid model ; ISG ; Fast Fourier Transform ; Wong-Gore Stokes kernel modification ; Uruguay ; EARTH SCIENCE 〉 SOLID EARTH 〉 GEODETICS 〉 GEOID CHARACTERISTICS ; EARTH SCIENCE 〉 SOLID EARTH 〉 GRAVITY/GRAVITATIONAL FIELD 〉 GRAVITY
    Type: Dataset , Dataset
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    DATA GFZ
  • 8
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    The Uruguayan gravimetric geoid: UruGeoide110 (2023)
    GFZ Data Services
    Details
    Publication Date: 2024-05-02
    Description: Abstract
    Description: The Uruguayan gravimetric geoid model UruGeoide110 was calculated by the Military Geographic Institute (IGM) in 2023. The extent is from 29.5° S to 35.5° S in latitude, and 52.5° W to 59.5° W in longitude, covering parts of Argentina and Brazil, with a grid resolution of 1´ x 1´. The geodetic reference system is SIRGAS ROU-98 (the reference ellipsoid is GRS80). The model is a combination of the EIGEN-6C4 geopotential model up to degree and order of 720, 10,429 land gravimetric stations plus 10,089 free air gravity anomalies in marine areas, based on the DTU13 model. The terrain data at the final 90 m resolution was taken from a 2017 Lidar survey in Uruguay with a 2.5 m initial resolution and SRTM (V2) for the external terrestrial data. The DT18 bathymetry model was used for the marine areas. Due to the total terrain data points (about 104 million), the overall area was divided into 4 overlapped blocks in the framework of the remove-compute-restore procedure. The reduced height anomalies were computed from the reduced gravity anomalies with Stokes 1D FFT and Wong Gore´s kernel modification (170-180 degrees). After adding back the residual terrain model effects and the contribution of the global geopotential model, the obtained quasi-geoid was transformed into a geoid model via Bouguer anomalies, even if the difference between the two models is just a few mm. A comparison with 51 GNSS/levelling stations shows a standard deviation of 10 cm. The geoid model is provided in ISG format 2.0 (ISG Format Specifications), while the file in its original data format is available at the model ISG webpage.
    Description: Other
    Description: The International Service for the Geoid (ISG) was founded in 1992 (as International Geoid Service - IGeS) and it is now an official service of the International Association of Geodesy (IAG), under the umbrella of the International Gravity Field Service (IGFS). The main activities of ISG consist in collecting, analysing and redistributing local and regional geoid models, as well as organizing international schools on the geoid determination (Reguzzoni et al., 2021).
    Keywords: Geodesy ; Geoid model ; ISG ; Fast Fourier Transform ; Wong-Gore Stokes kernel modification ; Uruguay ; EARTH SCIENCE 〉 SOLID EARTH 〉 GEODETICS 〉 GEOID CHARACTERISTICS ; EARTH SCIENCE 〉 SOLID EARTH 〉 GRAVITY/GRAVITATIONAL FIELD 〉 GRAVITY
    Type: Dataset , Dataset
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    DATA GFZ
  • 9
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    The Global Heat Flow Database: Release 2024 (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-05-02
    Description: Abstract
    Description: The data publication contains the compilation of global heat-flow data by the International Heat Flow Commission (IHFC; www.ihfc-iugg.org) of the International Association of Seismology and Physics of the Earth's Interior (IASPEI). The presented data update release 2024 contains data generated between 1939 and 2024 and constitutes the second intermediate update benefiting from the global collaborative assessment and quality control of the Global Heat Flow Database running since May 2021 (http://assessment.ihfc-iugg.org). The data release comprises new original heat-flow data published since April 2023 (the update 2023). It contains 91,182 heat-flow data from 1,586 publications. 57% of the reported heat-flow values are from the continental domain (n ~ 54,553), while the remaining 43% are located in the oceanic domain (n ~ 36,692).
    Keywords: heat flow density ; Global Heat Flow Database ; International Heat Flow Commission ; EARTH SCIENCE 〉 OCEANS 〉 MARINE VOLCANISM 〉 BENTHIC HEAT FLOW ; EARTH SCIENCE 〉 OCEANS 〉 OCEAN HEAT BUDGET 〉 HEAT FLUX ; physical property 〉 temperature
    Type: Dataset , Dataset
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    DATA GFZ
  • 10
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    Ellipsoidal Harmonic Forward Model derived from Earth2014 topographies up to d/o 7200: EHFM_Earth_7200 (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-04-30
    Description: Abstract
    Description: The model named EHFM_Earth_7200 was derived by layer-based forward modeling technique in ellipsoidal harmonics, the maximum degree of this model reaches 7200. The relief information was provided by Earth2014 relief model. EHFM_Earth_7200 provides very detailed (~3 km) information for the Earth’s short-scale gravity field, and it is expected to be able to augment or refine existing global gravity models. To meet the existing standard, here we provide spherical harmonic coefficients, which are transformed from original ellipsoidal harmonic coefficients. The maximum degree of the spherical harmonic coefficients is 7300.
    Description: Methods
    Description: - Compute global equiangular reduced latitude grids from degree 10800 Earth2014 SHCs and expanded these grids into EHCs. The grids are band-limited in spherical harmonics instead of in ellipsoidal harmonics so extra degrees beyond the truncation degree are also calculated. We obtained surface EHCs up to degree and order (d/o) 11000 but truncated them to d/o 7200. - Calculate potential models of three layers (crust, water and ice) separately from Earth2014 reliefs by new developed ellipsoidal harmonic forward modeling formulas. The densities of the three layers are 2670, 1030, and 917 kg/m^3. - Sum up results from the three layers and obtain EHFM_Earth_7200 ellipsoidal harmonic coefficients. - Convert ellipsoidal harmonic coefficients to spherical harmonic coefficients. The maximum degree of the spherical harmonic coefficients is 7300.
    Keywords: Gravity forward modeling ; Ellipsoidal topographic potential ; Spectral domain ; Layer concept ; ICGEM ; geodesy ; topographic gravity field model ; EARTH SCIENCE 〉 SOLID EARTH 〉 GRAVITY/GRAVITATIONAL FIELD ; EARTH SCIENCE 〉 SOLID EARTH 〉 GRAVITY/GRAVITATIONAL FIELD 〉 GRAVITY
    Type: Dataset , Dataset
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    DATA GFZ
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