71 Works

Helmholtz Open Science Briefing: Zweites Helmholtz Open Science Forum \"Helmholtz in der Nationalen Forschungsdateninfrastruktur (NFDI)\": Report

Nina Leonie Weisweiler, Roland Bertelmann, Constanze Curdt, Frank Oliver Glöckner, Uwe Jandt, Achim Streit, York Sure-Vetter & Nicolas Villacorta
Zur Förderung des Dialogs zur NFDI in der Helmholtz-Gemeinschaft veranstaltete das Helmholtz Open Science Office am 8. Dezember 2021 ein zweites virtuelles Helmholtz Open Science Forum unter dem Motto „Helmholtz in der Nationalen Forschungsdateninfrastruktur (NFDI)“. Alle Mitarbeitenden der Helmholtz-Gemeinschaft waren eingeladen, sich an dem zentrenübergreifenden Austausch zu beteiligen. Aufbauend auf das erste Forum im Mai 2021 lag der Schwerpunkt der Veranstaltung auf der Identifikation und Diskussion von Helmholtzspezifischen Themen und Aktivitäten bei der Realisierung der...

Simulation study of hydrate formation from dissolved methane in the LArge-scale Reservoir Simulator (LARS)

Zhen Li , Thomas Kempka , Erik Spangenberg & Judith Schicks
Hydrate formation from dissolved methane in saline solutions is a hydrochemical process, resulting in the accumulation of gas hydrates in sedimentary strata under the seafloor or overlain by permafrost regions. In the scope of the SUGAR framework, LARS has been established to study gas hydrate formation processes and dissociation strategies under in-situ conditions. In the latest hydrate formation experiments, key parameters have been applied to mimic the local marine environment of the Mallik site, Canada....

The Helmholtz Research Field Earth & Environment DataHub and its NFDI4Earth connection

Peter Braesicke , Roland Bertelmann , Jan Bumberger & Sören Lorenz
Digitalisation and FAIR data are overarching elements in the Helmholtz Research Field Earth and Environment (RF E&E) Program-Oriented Funding Phase IV (PoF IV). Already in the transition years from PoF III to PoF IV (2019/2020) different measures were implemented to facilitate this aim. One of them is the so-called DataHub, with the aim that all Earth System (ES) data that is generated by the RF E&E will be available as FAIR data via a common...

Revised and improved geological model of the Waiwera geothermal reservoir, New Zealand

Andreas Grafe , Thomas Kempka , Michael Schneider & Michael Kühn
Following a thermal and photogrammetric outcrop mapping campaign undertaken at the Waiwera geothermal reservoir in 2019, a pre-existing 3D hydrogeological model was revised in the present study to assess the impact of the updated structural and lithological interpretation on the existing numerical model calibration. For the latter, well data comprising measured temperature and salinity profiles were employed to reconstruct the reservoir’s natural thermal state and spatial distribution of salinity, supported by numerical simulations of density-driven...

The SpannEnD project – Towards a robust prediction of the 3D stress state in the upper crust of Germany

Karsten Reiter , Steffen Ahlers , Sophia Morawietz , Luisa Röckel , Tobias Hergert , Andreas Henk , Birgit Müller & Oliver Heidbach
The assessment of the long-term stability of geological units in the context of subsurface use is a complex topic in which various geoscientific and technical aspects play an important role. For example, the geomechanical stability of radioactive waste repositories due to endogenous, exogenous and engineering processes is an important aspect in the long term. For a stability prognosis, an estimation of the recent stress state as well as an assessment of realistic future stress changes...

Inverse geochemical modelling demonstrates how weathering and ion surface exchange control groundwater chemistry in the Pra Basin (Ghana)

Evans Manu , Michael Kühn , Thomas Kempka & Marco De Lucia
Effective implementation of sustainable water resources management is one of the daunting tasks in most parts of the world. The Pra Basin has a high economic importance, hosting most of Ghana’s mineral resources, including gold, bauxite, iron, manganese, and diamonds. Currently, the basin is faced with several water resources management issues, especially pollution arising from the discharge of untreated waste into water bodies and illegal artisanal mining. Considering this background, the present study aims to...

Open Science Factsheet No. 7 based on the 62nd online seminar: The IPCC FAIR Guidelines from the perspective of the IPCC Data Distribution Centre (DDC)

Martina Stockhause, Lea Maria Ferguson, Antonia Schrader & Nina Leonie Weisweiler

Model Policy on Sustainable Software at the Helmholtz Centers

Felix Bach, Oliver Bertuch, C. Busse, Wolfgang zu Castell, S. Celo, M. Denker, S. Dinkelacker, Stephan Druskat, C. Faber, A. Finke, B. Fritzsch, Martin Hammitzsch, J. Haseleu, U. Konrad, J. Krupa, Y. Leifels, K. Mohns-Pöschke, M. Moravcikova, J. Nöller, C. Möhl, M. Nolden, M. Scheinert, U. Schelhaas, Kaja Scheliga, T. Schlauch … & D. Wortmann
The Model Policy was drawn up by the Research Software Task Group with the assistance of other experts from the Helmholtz Association and was agreed with the Technology Transfer and Commercial Legal Protection Working Group and the Legal Affairs Working Group. The present version was adopted by the Open Science Working Group on November 21, 2019.

Zugang zu und Nachnutzung von wissenschaftlicher Software – Positionspapier des Arbeitskreises Open Science der Helmholtz-Gemeinschaft

Dieses Positionspapier wurde von der Task Group „Zugang zu und Nachnutzung von wissenschaftlicher Software“ des Arbeitskreises Open Science der Helmholtz-Gemeinschaft erarbeitet und vom Arbeitskreis Open Science am 14.03.2017 verabschiedet.

Open Science Factsheet No. 8 based on the 63rd online seminar: The Charité Dashboard on Responsible and Open Research

Nico Riedel, Lea Maria Ferguson, Antonia Schrader & Nina Leonie Weisweiler

Authority, Identity and Ethics of Data Re-publication and Duplication

Lesley Wyborn , Kirsten Elger , Jens Klump , Kerstin Lehnert & Mingfang Wu
Today, research data is widely available in digital form, datasets are easily accessible online and the dataset creator should consider it advantageous as this leads to greater uptake. However, the downside is that digital datasets can be easily copied, duplicated in multiple places, and re-published through more than one repository or service. Particularly with web services, mirroring resources is a common practice, especially in online GIS packages and dashboards. ‘Copy WMS link’ buttons are common,...

Si isotope thermometry in silicified carbonate

Michael Tatzel , Marcus Oelze , Moritz Liesegang , Maria Stuff & Michael Wiedenbeck
Cherts, including silicified carbonates, are one of the most detailed and alteration resistant archives of near-surface environments. Yet, the information disclosed in form of stable isotope ratios of Si and O cannot be confidently translated into conditions prevailing at the Earth surface in deep time. Thermometry based on δ18O is compromised by the lack of knowledge about the fluid’s δ18O value and attempts to determine Si sources or temperatures from δ30Si remain unsatisfying. We investigated...

Hipercorig Hallstatt History (H3): Accessign a deep time window of Lake Hallstatt´s preHistory

Michael Strasser, Flavio Anselmetti, Achim Brauer, Stefano Fabbri, Ulrich Harms & Kerstin Kowarik

Curating data and samples in the long-tail - tools and examples from GFZ Data Services

Kirsten Elger & Florian Ott
GFZ Data Services, an international research data repository for the Earth sciences domain and Allocating Agent for the IGSN Global Sample Number (IGSN), is operated under the umbrella of the GFZ German Research Centre for Geosciences. GFZ Data Services increases the discoverability and reusability of data through (1) the provision of comprehensive domain-specific data description via standardised and machine-readable metadata with controlled domain vocabularies; (2) complementing the metadata with comprehensive and standardised technical data descriptions...

Quantifying carbonate denudation from cosmogenic 36Cl and climatic and tectonic controls on carbonate landscape evolution

Richard F Ott , Sean F Gallen & David Helman
Department of Earth Sciences, ETH Zurich, Zurich, Switzerland(1);Earth Surface Geochemistry, German Centre for Geoscience Research, Potsdam, Germany(2);Department of Geosciences, Colorado State University, Fort Collins, US(3);Department of Soil and Water Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel(4);Advanced School for Environmental Studies, The Hebrew University of Jerusalem, Jerusalem, Israel(5);Quantifying carbonate denudation and the partitioning between chemical and mechanical surface lowering in karstic areas is challenging. Here...

Geochemical control of hydraulic and mechanical reservoir sandstone properties

Maria Wetzel , Thomas Kempka & Michael Kühn
University of Potsdam, Institute of Geosciences(2);Geochemical processes such as mineral dissolution and precipitation alter the microstructure of rocks, and thereby affect their hydraulic and mechanical behaviour. Quantifying and considering these property changes in reservoir simulations substantially supports risk assessments related to geological subsurface utilization. In our virtual laboratory, 3D pore-scale models of typical reservoir sandstones are applied to determine the effective hydraulic and elastic properties of sandstones. In order to adequately depict characteristic distributions of...

Sandbox – Creating and Analysing Synthetic Sediment Sections with R

Michael Dietze , Sebastian Kreutzer & Margret C. Fuchs
Geoscientific concepts and hypotheses are usually formulated based on empirical data from the field or the laboratory (induction). After translation into models they can be applied to case study scenarios (deduction). However, the other way around – expressing hypotheses explicitly by models and test these by empiric data – is a rarely touched trail. There are several models tailored to investigate the boundary conditions and processes that generate, mobilise, route and eventually deposit sediment in...

Stromatolitic microorganisms in and on top of fluid-escape structures of the 3.2 Ga Moodies Group

Sebastian Reimann , Christoph Heubeck , Martin Homann , Deon Johannes Janse van Rensburg & Michael Wiedenbeck
The global record of early life is only poorly preserved, but has an ark in the 3.2 Ga Moodies Group of the Barberton Greenstone Belt, South Africa and Eswatini. It preserves silicified photosynthetic and sulfate-reducing metabolic signatures in sandstone-dominated, terrestrial to shallow-marine strata. Large fluid-escape structures are common in thick-bedded kerogen-laminated sandstones of (sub-)tidal facies. We document and interpret silicified, massive and laminated carbonate aggregates and beds, both of likely microbial origin, within and on...

Stratigraphische Tabelle von Deutschland 2016 (STD 2016)

Recommendations for Transformative Journal Agreements with Providers of Publishing Services: Guidelines of the priority initiative “Digital Information” of the Alliance of Science Organisations in Germany, against the background of the implementation of the Open Access Strategy 2021–2025 of the Alliance of Science Organisations in Germany

, Heinz Pampel, Roland Bertelmann, Kristine Hillenkötter, Bernhard Mittermaier, Dirk Pieper, Hildegard Schäffler, Stefanie Seeh & Marco Tullney

Megathrust shear force limits mountain height at convergent plate boundaries

Armin Dielforder , Ralf Hetzel & Onno Oncken
The shear force along convergent plate boundary faults (megathrusts) determines the height of mountain ranges that can be mechanically sustained. Whether the true height of mountain ranges corresponds to this tectonically supported elevation is, however, debated. In particular, climate-dependent erosional processes are often assumed to exert a major control on mountain height, although this assumption has remained difficult to validate. To address this issue, we first constrained the shear force along active megathrusts from their...

Integrated Processing of GNSS an VLBI on the Observation Level

Jungang Wang
The Global Geodetic Reference Frame (GGRF) plays a fundamental role in geodesy and related Positioning, Navigation, and Timing applications, and allows to quantify the Earth’s change in space and time. The ITRF and ICRF are the two most important components to realize GGRF, while the determination of these two reference frames relies on the combination of several space geodetic techniques, mainly, VLBI, SLR, GNSS, and DORIS. The combination is currently done on either the parameter...

Recommendations for Policies of the Helmholtz Centers on Research Data Management

The present Recommendations for Policies of the Helmholtz Centers on Research Data Management were adopted on September 13/14, 2017 by the Assembly of Members of the Helmholtz Association of German Research Centers. It was emphasized that, for the Helmholtz Association, open access and technology transfer are goals of equal importance whose possibly diverging requirements have to be weighed against each other in each individual case.

Large hydraulic diffusivity of a single fault

Qinglin Deng , Guido Blöcher , Jean Schmittbuhl & Mauro Cacace
We provided an approach to estimate hydraulic diffusivity of a single fault by solving the linear diffusion equation in a partly open rough fracture under drained conditions when applying small pressure drop fluctuations (10^-5 Pa) along the fault. In contrast to the traditional calculation for the fracture hydraulic diffusivity using parameters such as hydraulic aperture, fluid compressibility, fluid viscosity, we here directly used time-dependent pressure profile p(x, y, t) to match the analytical solution for...

Tectonic accretion controls erosional cyclicity in the Himalaya

Dirk Scherler , Sanjay Kumar Mandal & Hella Wittmann
Indian Institute of Science Education and Research Kolkata, Mohanpur, India(3);The evolution of Earth’s climate over geological timescales is linked to surface erosion by weathering of silicate minerals and burial of organic carbon. However, methodological difficulties in reconstructing erosion rates through time and feedbacks among tectonics, climate, and erosion spurred an ongoing debate on mountain erosion sensitivity to tectonic and climate forcing. A key question is whether late Cenozoic climate cooling has increased global erosion rates...

Registration Year

  • 2022

Resource Types

  • Text


  • Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
  • Helmholtz Association of German Research Centres
  • Helmholtz Centre for Environmental Research
  • Freie Universität Berlin
  • Karlsruhe Institute of Technology
  • University of Göttingen
  • University of Potsdam
  • Technical University of Darmstadt
  • GEOMAR Helmholtz Centre for Ocean Research Kiel
  • Forschungszentrum Jülich