450 Works

Turning 80 years of global research on heat flow into a sustainable research data infrastructure

Sven Fuchs
Measured data of the Earth’s surface heat flow are rare observables for heat transport processes in the Earth interior. Precise knowledge of heat flow is thus fundamental (i) to describe the Earth’s thermal field, (ii) to decipher plate-tectonic and geodynamic processes and (iii) to understand natural or artificial utilized geological thermal systems – across all spatial scales and timely domains. Heat flow data are documented in more than 1,400 publications and are collected by the...

Hydro-Mechanical Simulation in Geothermal Reservoirs: Physics and Surrogate Modeling

Ryan Santoso , Denise Degen , Mauro Cacace & Florian Wellmann
Hydro-mechanical (HM) simulations are essential aspects of geothermal reservoir studies to assess the heat production and the associated-environmental impacts, such as seismicity. HM simulations are numerically expensive (especially for large-scale simulations) since they require a relatively fine mesh to capture the complex interplay between the fluid-flow and geomechanical processes. This aspect makes it difficult to perform detailed studies on uncertainties in HM simulations. In this work, we present a comprehensive review and numerical demonstrations about...

GeoLaB - Geothermal Laboratory in the Crystalline Basement

Thomas Kohl , Eva Schill , Judith Bremer , Günter Zimmermann , Olaf Kolditz & Ingo Sass
In Central Europe, the largest geothermal potential resides in the crystalline basement rock with important hotspots in tectonically stressed areas. To better harvest this energy form under sustainable, predictable and efficient conditions, new focused, scientific driven strategies are needed. Similar to other geo-technologies, the complex processes in the subsurface need to be investigated in large-scale facilities to ensure environmental sustainability. The proposed new underground research laboratory GeoLaB (Geothermal Laboratory in the Crystalline Basement) will address...

Good (Digital) Research Practice and Open Science Support and Best Practices for Implementing the DFG Code of Conduct “Guidelines for Safeguarding Good Research Practice”. Helmholtz Open Science Briefing. Good (Digital) Research Practice and Open Science Support and Best Practices for Implementing the DFG Code of Conduct “Guidelines for Safeguarding Good Research Practice” Version 2.0

Lea Maria Ferguson, Roland Bertelmann, Christoph Bruch, Reinhard Messerschmidt, Heinz Pampel, Antonia Schrader, Paul Schultze-Motel & Nina Leonie Weisweiler
The German Research Foundation’s (DFG) Code of Conduct “Guidelines for Safeguarding Good Research Practice” has been in force since August 1, 2019. Open science aspects are of relevance to many of the guidelines contained in the Code. The Helmholtz Open Science office provides the present guide for these aspects. Based on selected recommendations in the DFG Code, it describes in a practical way the rele-vance of open science when implementing the Code at the Helmholtz...

Experimental simulations of hydrogen migration through potential storage rocks

Bettina Strauch , Peter Pilz , Johannes Hierold & Martin Zimmer
The save and effective storage of hydrogen in geological formations is an important part towards the implementation of renewable energy use. Due to fluctuating power supply from wind or solar plants, it is envisaged to use excess energy for electrolytical hydrogen production and the subsequent temporary storage in geological formations, as buffer for energy at “high-demand-low-production-times”. The preferred geological storage formations are either salt deposits or porous sandstones with a gas-tight caprock. To date, these...

Checklist to Support the Helmholtz Centers in Implementing Policies on Sustainable Research Software

Reinhard Messerschmidt, Heinz Pampel, Felix Bach, Wolfgang zu Castell, Michael Denker, Ants Finke, Bernadette Fritzsch, Martin Hammitzsch, Uwe Konrad, Yvonne Leifels, Christoph Möhl, Marco Nolden, Markus Scheinert, Tobias Schlauch, Thomas Schnicke & Dirk Steglich
As the digitalization of research and teaching progresses, the number of software solutions developed at scientific institutions and used for the purpose of knowledge production is increasing. The accessibility and reuse of scientific results called for under the heading “open science” can be ensured in many fields only if, in addition to research data, program code is also made openly accessible. The present guide is addressed to decision-makers at the Helmholtz Centers who deal with...

The H2020 REFLECT project: Deliverable 6.4 - Stakeholder Workshops

Katrin Kieling
This report presents the stakeholder workshops organised in the REFLECT project, in the framework of the WP6 Dissemination and exploitation, Task 6.2 – Ensure transferability and exploitation of project results. The Task 6.2 planned to inform the stakeholders identified in the matrix developed under Task 6.1 about the project activities and main outcomes. For this purpose, two physical stakeholder workshops were organised during the project. The first workshop, at the start of the project, was...

Additional file 1 of The impact of hydrothermal alteration on the physiochemical characteristics of reservoir rocks: the case of the Los Humeros geothermal field (Mexico)

Leandra M. Weydt, Federico Lucci, Alicja Lacinska, Dirk Scheuvens, Gerardo Carrasco-Núñez, Guido Giordano, Christopher A. Rochelle, Stefanie Schmidt, Kristian Bär & Ingo Sass
Additional file 1: Table S1. Major (wt%) and trace element (ppm) concentrations of the outcrop and reservoir samples. Table S2. Chemical indices of the outcrop and reservoir samples. Table S3. Cross-correlations of selected major, trace, and rare-earth elements. Table S4. Concentration changes in % of major and trace elements of the reservoir samples. Table S5. P-values obtained during Kruskal–Wallis tests.

Additional file 1 of The impact of hydrothermal alteration on the physiochemical characteristics of reservoir rocks: the case of the Los Humeros geothermal field (Mexico)

Leandra M. Weydt, Federico Lucci, Alicja Lacinska, Dirk Scheuvens, Gerardo Carrasco-Núñez, Guido Giordano, Christopher A. Rochelle, Stefanie Schmidt, Kristian Bär & Ingo Sass
Additional file 1: Table S1. Major (wt%) and trace element (ppm) concentrations of the outcrop and reservoir samples. Table S2. Chemical indices of the outcrop and reservoir samples. Table S3. Cross-correlations of selected major, trace, and rare-earth elements. Table S4. Concentration changes in % of major and trace elements of the reservoir samples. Table S5. P-values obtained during Kruskal–Wallis tests.

Additional file 8 of MarineMetagenomeDB: a public repository for curated and standardized metadata for marine metagenomes

Muhammad Kabiru Nata’ala, Anderson P. Avila Santos, Jonas Coelho Kasmanas, Alexander Bartholomäus, João Pedro Saraiva, Sandra Godinho Silva, Tina Keller-Costa, Rodrigo Costa, Newton C. M. Gomes, André Carlos Ponce de Leon Ferreira de Carvalho, Peter F. Stadler, Danilo Sipoli Sanches & Ulisses Nunes da Rocha
Additional file 8. Fig. S1: Graphic of the percentage of missing values for each attribute of MarineMetagenomeDB by source database.

MarineMetagenomeDB: a public repository for curated and standardized metadata for marine metagenomes

Muhammad Kabiru Nata’ala, Anderson P. Avila Santos, Jonas Coelho Kasmanas, Alexander Bartholomäus, João Pedro Saraiva, Sandra Godinho Silva, Tina Keller-Costa, Rodrigo Costa, Newton C. M. Gomes, André Carlos Ponce de Leon Ferreira de Carvalho, Peter F. Stadler, Danilo Sipoli Sanches & Ulisses Nunes da Rocha
Abstract Background Metagenomics is an expanding field within microbial ecology, microbiology, and related disciplines. The number of metagenomes deposited in major public repositories such as Sequence Read Archive (SRA) and Metagenomic Rapid Annotations using Subsystems Technology (MG-RAST) is rising exponentially. However, data mining and interpretation can be challenging due to mis-annotated and misleading metadata entries. In this study, we describe the Marine Metagenome Metadata Database (MarineMetagenomeDB) to help researchers identify marine metagenomes of interest for...

Determination of phases of warm climate during MIS 3 in Central Europe based on precisely dated speleothems from Bleßberg Cave, Germany

Jennifer Klose , Sebastian F. M. Breitenbach , Birgit Plessen , Hubert Vonhof & Denis Scholz
Speleothems provide a great opportunity for paleoclimate reconstruction because they occur almost worldwide and can be dated very precisely using the U-series disequilibrium method. The most commonly used climate proxies are stable isotope values (δ18O and δ13C) and trace elements. However, these are influenced by a variety of surface and in-cave processes, which results in a non-trivial interpretation of the speleothem proxy signals. The last glacial period and in particular the Marine Isotope Stage (MIS)...

Additional file 3 of MarineMetagenomeDB: a public repository for curated and standardized metadata for marine metagenomes

Muhammad Kabiru Nata’ala, Anderson P. Avila Santos, Jonas Coelho Kasmanas, Alexander Bartholomäus, João Pedro Saraiva, Sandra Godinho Silva, Tina Keller-Costa, Rodrigo Costa, Newton C. M. Gomes, André Carlos Ponce de Leon Ferreira de Carvalho, Peter F. Stadler, Danilo Sipoli Sanches & Ulisses Nunes da Rocha
Additional file 3. Table S3: Attributes chosen to represent different synonyms from SRAdb’s ‘sample_attribute’.

Additional file 4 of MarineMetagenomeDB: a public repository for curated and standardized metadata for marine metagenomes

Muhammad Kabiru Nata’ala, Anderson P. Avila Santos, Jonas Coelho Kasmanas, Alexander Bartholomäus, João Pedro Saraiva, Sandra Godinho Silva, Tina Keller-Costa, Rodrigo Costa, Newton C. M. Gomes, André Carlos Ponce de Leon Ferreira de Carvalho, Peter F. Stadler, Danilo Sipoli Sanches & Ulisses Nunes da Rocha
Additional file 4. Table S4: Marine ‘MarMDB’ attributes groups and their respective values.

Additional file 7 of MarineMetagenomeDB: a public repository for curated and standardized metadata for marine metagenomes

Muhammad Kabiru Nata’ala, Anderson P. Avila Santos, Jonas Coelho Kasmanas, Alexander Bartholomäus, João Pedro Saraiva, Sandra Godinho Silva, Tina Keller-Costa, Rodrigo Costa, Newton C. M. Gomes, André Carlos Ponce de Leon Ferreira de Carvalho, Peter F. Stadler, Danilo Sipoli Sanches & Ulisses Nunes da Rocha
Additional file 7. Table S7: Packages and their versions used for the WebApp.

PID Network Deutschland. Netzwerk für die Förderung von persistenten Identifikatoren in Wissenschaft und Kultur

Roland Bertelmann, Matt Buys, Jürgen Kett, Heinz Pampel, Dirk Pieper, Frank Scholze, Irina Sens, Felix Burger, Britta Dreyer, Stephanie Glagla-Dietz, Stephanie Hagemann-Wilholt, Sarah Hartmann, Antonia Schrader, Jochen Schirrwagen, Friedrich Summann & Paul Vierkant

Workshop: Copernicus Daten für Naturschutz, Flächenmanagement und Gewässer – Hochwasseranalyse mithilfe von Sentinel-2 Daten in QGIS

Katrin Koch, Simon Hahn, Antonia Cozacu, Nora Meyer zu Erpen & Oliver Fabisch
Wie können Satellitendaten, genauer gesagt Sentinel Daten des europäischen Erdbeobachtungprogramms Copernicus, im Bereich Umweltmonitoring unterstützend angewandt werden? Und wie können Umweltbehörden diese Erkenntnisse nutzen? Neben diesen beiden Fragen stehen sowohl die Anwendung unterschiedlicher Bandkombinationen und Indizes, als auch unzählige Beispiele aus der Praxis im Mittelpunkt der Schulungsreihe "Framework Partnership Agreement on Copernicus User Uptake - Copernicus für Umweltbehörden". Das zweite Dokument dieser Reihe bietet eine Schritt für Schritt Anleitung für die Analyse eines 5-jährlichen Hochwasserereignisses...

Investigating Nitrate Pollution Sources and NaturalBackground in Groundwater of the Densu Basin: A Model-based Approach

George Yamoah Afrifa , Larry-pax Chegbeleh , Patrick Asamoah Sakyi , Mark Sandow Yidana , Yvonne Sena Akosua Loh , Theophilus Ansah-Narh & Evans Manu
Nitrate is one of the dominant chemical pollutants of groundwater, and there is a need to mitigate groundwater pollution in rural, urban and industrial terrains in an aquifer system. The study assesses the extent of nitrate pollution in the Densu Basin because of its predominance in agriculture and urbanized vicinities by employing robust techniques for estimating both the natural background and human-induced concentrations. The statistical methods used to estimate these concentrations are the pre-selection method,...

Research data_ upload.xlsx

Christof Sager, Kai Mangelsdorf, Alessandro Airo, Dirk Schulze-Makuch & Felix L. Arens
Data for the manuscript entitled: Habitability of Polygonal Soils in the Hyper-arid Atacama Desert after a Simulated Rain Experiment
Authors: Christof Sager, Alessandro Airo, Kai Mangelsdorf, Felix L. Arens, Cornelia Karger, Dirk Schulze-Makuch

Sichere Entsorgung und Tiefenlagerung von hochradioaktivem Material – Forschungsperspektiven

Heidi Blattmann, Christoph Clauser, Horst Geckeis, Peter Grathwohl, Armin Grunwald, Michael Kühn, Gregor Markl, Klaus-Jürgen Röhlig, Magdalena Scheck-Wenderoth, Frank Scherbaum, Georg Teutsch & Friedemann Wenzel
Während der Ausstieg aus der Nutzung der Kernenergie in Deutschland für April 2023 vorgesehen ist, bleibt die Entsorgung des hochradioaktiven Materials eine langfristige Aufgabe, die auch zukünftige Generationen betreffen wird. Mit dem Standortauswahlgesetz (StandAG) gibt der Gesetzgeber die Rahmenbedingungen für das derzeit laufende Verfahren zur Standortauswahl für ein tiefengeologisches Lager in Deutschland vor. Ziel des Verfahrens ist es, für einen Zeitraum von einer Million Jahre bestmögliche Sicherheit zu gewährleisten. Der Zeithorizont bis zu einem Verschluss...

Standardized organic geochemistry data of sediment core EN18208 from Lake Ilirney (Chukotka, Russia)

Boris K Biskaborn, Gregor Pfalz, Stuart Andrew Vyse, Bernhard Diekmann, Andrei A Andreev, Norbert R Nowaczyk, Birgit Heim, Mareike Wieczorek, Luidmila A Pestryakova & Ulrike Herzschuh
This data set is part of a larger data harmonization effort to make lake sediment core data machine readable and comparable. Here we standardized radiocarbon and OSL age data of sediment core EN18208, retrieved in 2018 from Lake Ilirney (Chukotka, Russia) at 10.76 m water depth. The glacial lake Ilirney is situated in the forest tundra mountain area and has one outflow, one main inflow and several smaller inflows. It lies at an elevation of...

Standardized mineral data of sediment core EN18208 from Lake Ilirney (Chukotka, Russia)

Boris K Biskaborn, Gregor Pfalz, Stuart Andrew Vyse, Bernhard Diekmann, Andrei A Andreev, Norbert R Nowaczyk, Birgit Heim, Mareike Wieczorek, Luidmila A Pestryakova & Ulrike Herzschuh
This data set is part of a larger data harmonization effort to make lake sediment core data machine readable and comparable. Here we standardized mineral data of sediment core EN18208, retrieved in 2018 from Lake Ilirney (Chukotka, Russia) at 10.76 m water depth. The glacial lake Ilirney is situated in the forest tundra mountain area and has one outflow, one main inflow and several smaller inflows. It lies at an elevation of ca. 428 m...

Deep Rock Weathering Episode 4 – Microbes that eat Rocks

Friedhelm von Blanckenburg
Living organisms can also weather rocks. There are microorganisms in deep rock – in the "deep biosphere". With flowing water, the microbes are transported from soil through the fractures to depth. Down there, in complete darkness, the microbes live on water, carbon, and energy. They can oxidise iron in minerals and receive energy in the process. The iron-containing minerals are oxidised, carbon is consumed, and more and more microbes are created. This is how the...

El asesinato de las rocas. ¿Qué ocurre bajo la superficie terrestre?

Friedhelm von Blanckenburg
Se descubre un misterioso crimen en un almacén. Muchas rocas han sido asesinadas. El detective Hércule Poirot emprende la investigación del caso. Para ello, contrata a un grupo de geo-científicos internacionales que buscan a los "culpables" en una campaña de perforación en los espectaculares paisajes de Chile. Los científicos encuentran pruebas del crimen en laboratorios de investigación y presentan una sorprendente solución al caso de asesinato. Esta película aborda una pregunta científica: ¿Cómo se convierte...

Manual of the Python Script PyFAST Calibration v1.0

Moritz Ziegler & Oliver Heidbach
The 3D geomechanical-numerical modelling of the in-situ stress state aims at a continuous description of the stress state in a subsurface volume. It requires observed stress information within the model volume that are used as a reference. Once the modelled stress state is in agreement with the observed reference stress data the model is assumed to provide the continuous stress state in its entire volume. The modelled stress state is fitted to the reference stress...

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