84 Works

Stauseen setzen große Mengen Methan frei

Jana Kandarr & Florian Wittmann
Kohlestrom, Erdgas, Erdöl, Atomkraft – im Vergleich dazu erscheint Energie aus Wasserkraft als saubere Alternative. Doch für Großprojekte müssen häufig riesige Gebiete dauerhaft geflutet werden. Sind diese voller üppiger Vegetation wie im Mekong-Delta oder Amazonasbecken, gehen nicht nur einzigartige Lebensräume verloren, sondern diese großen Staudämme weisen auch eine teils miserable Klimabilanz auf.

Stadtbäume besser umsorgen. Interview [Teil 2]

Somidh Saha, Jana Kandarr & Oliver Jorzik
Oftmals fehlt es in Städten an einem geeigneten Baum-Management. Im zweiten Teil unseres ESKP-Interviews plädiert der Forstexperte Dr. Somidh Saha für gesetzliche Regelungen, die das Fällen von Großbäumen in Städten bundesweit stoppen.

Stadtbäume im Stress. Interview [Teil 1]

Somidh Saha, Jana Kandarr & Oliver Jorzik
Im Trockenjahr 2018 sind in vielen Städten und Gemeinden Deutschlands frisch gepflanzte Bäume eingegangen. Im ersten Teil unseres ESKP-Interviews fordert Dr. Somidh Saha vom Karlsruher Institut für Technologie (KIT) bessere Baumregister, um alle Stadtbäume zu erfassen.

Tuna-Steak und Co. Methylquecksilber im Fisch

Jana Kandarr & Florian Wittmann
Sushi erfreut sich immer größerer Beliebtheit. Weltweit nimmt der Appetit auf Fisch zu, in den letzten 50 Jahren hat sich dessen Verzehr verdoppelt. Nicht unwesentlich ist daher die Schadstoff-Belastung von Speisefischen für den Menschen. Insbesondere Raubfische weisen hohe Konzentrationen an Methylquecksilber auf.

Konvektive Starkwindereignisse in Deutschland

Susanna Mohr
Sturmböen im Sommer sind häufig mit schweren Schäden verbunden. Da sie in Mitteleuropa vor allem in den warmen Sommermonaten auftreten, können sie zudem bei Outdoor-Aktivitäten oder Open-Air-Veranstaltungen ein erhebliches Gefahrenpotential darstellen.

Europäische Versäumnisse bei der Erschließung und Bewertung neuer Lagerstätten. Interview

Jochen Kolb
Auch mit modernsten Technologien benötigen Geologen mindestens zehn Jahre, um einen Rohstoff als Reserve oder Ressource der Industrie bereitstellen zu können. Europa investiert bisher wenig in die Bewertung und Erschließung eigener Lagerstätten. Mit einer Änderung dieser Philosophie ließen sich auch viele Umweltprobleme in Entwicklungsländern vermeiden, die der Bergbau dort verursacht. Der Lagerstättenkundler Prof. Dr. Jochen Kolb vom Institut für Angewandte Geowissenschaften des Karlsruher Instituts für Technologie (KIT) im Interview.

Checkliste zur Unterstützung der Helmholtz-Zentren bei der Implementierung von Richtlinien für nachhaltige Forschungssoftware

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
Mit der voranschreitenden Digitalisierung von Forschung und Lehre steigt die Zahl an Software-Lösungen, die an wissenschaftlichen Einrichtungen entstehen und zur Erkenntnisgewinnung genutzt werden. Die – unter dem Stichwort Open Science geforderte – Zugänglichkeit und Nachnutzung von wissenschaftlichen Ergebnissen kann in vielen Fachgebieten nur sichergestellt werden, wenn neben Forschungsdaten auch Programmcode offen zugänglich gemacht wird. Die vorliegende Handreichung richtet sich an Entscheider*innen in den Helmholtz-Zentren, die sich mit der Implementierung von Richtlinien für nachhaltige Forschungssoftware befassen....

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...

Wall rock contamination and mineralogical modifications in carbonatite dykes of the Palabora Complex, South Africa

R. Johannes Giebel , Benjamin F. Walter , Michael A.W. Marks & Gregor Markl
Contamination of carbonatite melts is often neglected due to a fast magma ascent and low liquidus temperatures. However, increased silicate mineral formation observed in numerous carbonatite occurrences world-wide requires an external Si introduction. Our study demonstrates that carbonatite dykes penetrating different lithologies of Palabora (South Africa) shows different modes of mineralogical modification. In particular Al and Si-rich lithologies show the most significant effects. Besides silicate mineral formation Si introduction may cause directly and indirectly variations...

FloodRisk: Earthquakes, uplift, and long-term liabilities – risk minimisation during mine flooding

Dennis Quandt , Michael Alber , Felix Allgaier , Benjamin Busch , Even Markus , Kasper Fischer , Wolfgang Friederich , Jonas Greve , Mathias Knaak , Birgit Müller , Thomas Niederhuber , Detlev Rettenmaier , Martina Rische , Thomas Röckel , Frank Schilling , Daniel Schröder , Olaf Ukelis , Malte Westerhaus , Roman Zorn & Benjamin Busch
Due to the cessation of coal mining in Germany, mine water management in the former coal districts is subject to change and of environmental and economic significance. Since there is no technical need to drain the abandoned coal mines, mine water levels rise. As a result, subsurface rock pore pressures rise changing the subsurface effective stress regime. This may induce local ground movements and activate mining-related and natural fault zones. In order to develop a...

Diverse Cultures, Universal Capacity: An Interview with Markus Gabriel

Yue Li & Markus Gabriel
The documentary Philosophy in the Age of Desire records a short encounter between Markus Gabriel and Hiroshi Ishiguro’s Geminoid in 2018. Their exchange on the role of technology in human life, on the conception of human being, and other topics revealed noticeable differences between the German philosopher and the Japanese engineer, but can these be interpreted as “cultural” differences? Four years later two separate interviews follow up on their conversation, This interview explores their differences...

Fracture network characterization and DFN modelling of the Upper Carboniferous, Ruhr Area, Germany

Felix Allgaier, Benjamin Busch , Dennis Quandt , Thomas Niederhuber , Birgit Müller & Christoph Hilgers
Since coal mining in the Ruhr Area has been ceased, mine water drainage is gradually reduced leading to the rise of formation water and groundwater levels. Rising mine water levels increase the pore pressure and induce stress changes in the subsurface, which may reactivate natural and/or mining-related faults and fractures. As part of the interdisciplinary FloodRisk project, which aims to enhance the understanding of the geomechanical coupling of increased pore pressure and heterogeneous ground movements,...

Reasons for extreme Th/U zoning of zircon in magmatic rocks: examples from the Bushveld Complex

Armin Zeh , Dominik Gudelius & Allan H Wilson
Zircons of magmatic rocks can show enormous variations in Th/U ratios (0.2 to 100) and extreme Th/U zoning. We present data from felsic and mafic rocks of the Bushveld Complex in South Africa. Zircon grains in mafic cumulate rocks reveal Th/U ratios up to 70, those in felsic rocks barely exceed 1.0. In mafic rocks zircon mostly occur together with Rt-Bt-Kfs-Qtz in intercumulus domains, and crystallized during final magma cooling between 900 and 700°C, after...

Petrology and Geochronology of foidites and melilitites in SW Germany and E France

Thomas Binder , Benjamin F. Walter & Michael A. W. Marks
Foidites and melilitites are strongly SiO2-undersaturated rocks that form by extremely low degrees of partial melting of the metasomatically overprinted lithospheric mantle. In Central Europe, they occur in volcanic fields, dike swarms or as isolated stocks and diatremes. Our detailed study on foidites from SW Germany indicates two distinct age groups with marked differences in mineralogy and mineral chemistry: Based on in-situ U Pb age data (apatite, perovskite, zircon) a Miocene cohort (~ 9–19 Ma)...

Transport mechanisms of hydrothermal convection in faulted sandstone reservoir ----- Implications for kilometer-scale thermal anomalies in Piesberg quarry

Guoqiang Yan , Robert Egert , Maziar Gholami Korzani & Thomas Kohl
A transient 3D model obtained from the Piesberg quarry as an illustrative example is based on idealized structural models that characterize all geological features during Late Jurassic rifting (162 Ma) to infer possible transport mechanisms of fluids leading to the formation of kilometer-scale thermal anomaly. Three-dimensional numerical simulations on hydrothermal convection systems in the faulted sedimentary basins are investigated with the aim to assess the lateral heating capacity of hydrothermal convection systems in faults, using...

Enhancing the contribution of closed systems to geothermal energy generation by increasing the ratio of generated power to the total length of wellbores

Morteza Esmaeilpour , Maziar Gholami Korzani & Thomas Kohl
Geothermal energy extraction through closed systems is a secure approach responding to the global heating demand without contaminating subsurface water and causing seismic events. However, the generated power of conventional closed systems is much lower than those of open systems. Therefore, this study is dedicated to planning a novel closed system, which can produce a significant amount of thermal power. For this purpose, the performance of a single closed-loop deep system with a lengthy horizontal...

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...

Nachbergbau: Chancen und Herausforderungen

Dennis Quandt , Tobias Rudolph & Christoph Hilgers
Bergbau im 21. Jahrhundert bedeutet auch Alt- und Nachbergbau, immer geknüpft an die Bewältigung post-montaner Herausforderungen und die Langzeit- und Zukunftsaufgaben. Hiermit einhergehend sind Fragestellungen zu den damit verbundenen Kosten und der Möglichkeit der Weiterentwicklung im Bereich der Standortintegrität und -überwachung. Zusätzlich ist die gesellschaftliche Akzeptanz (engl. „social license to operate“) von Bergbauprojekten immer ein Thema. Die Forderung der Öffentlichkeit nach mehr Informationen bei der Erkundung, der Erschließung, der Produktion und der Stilllegung eines Bergbaustandortes...

Ternary porosity systems: New perspectives for Buntsandstein geothermal reservoirs in the Upper Rhine Graben, SW Germany.

Ernst Kiefer , Birgit Müller & Frank Schilling
The clastic Lower Triassic Buntsandstein Formation in the Upper Rhine Graben of SW Germany and NE France has been identified as an attractive geothermal reservoir due to its fracture density and exceptionally high matrix porosity at depth levels of economic geothermal energy extraction. New petrophysical data from deep exploration wells reveal the existence of ternary porosity systems evolved during a multi-phase subsidence history and diagenesis especially at intra-graben structural highs. Primary elements of these porosity...

The Kieshöhe carbonatites in SW-Namibia – the role of silicatic xenoliths for REE exploration

Benjamin Florian Walter , R. Johannes Giebel , Alan Marlow , Michael Marks , Gregor Markl & Jochen Kolb
Exploration of carbonatite-associated REE-deposits is challenging due to heterogeneous ore distribution and variable and often complex ore mineralogy. The Kieshöhe carbonatite in SW Namibia represents a subvolcanic occurrence hosting dolomite, calcite and ankerite carbonatite dykes, ring dykes and diatremes. Petrography, whole rock geochemistry and microXRF imaging provide insights into the role of silicate xenoliths for the REE mineralization in a subvolcanic environment. Xenolith-rich carbonatites are relatively REE-poor with only minor monazite mineralization, whereas xenolith-free carbonatites...

Additional file 1 of On the use of Earth Observation to support estimates of national greenhouse gas emissions and sinks for the Global stocktake process: lessons learned from ESA-CCI RECCAP2

Ana Bastos, Philippe Ciais, Stephen Sitch, Luiz E. O. C. Aragão, Frédéric Chevallier, Dominic Fawcett, Thais M. Rosan, Marielle Saunois, Dirk Günther, Lucia Perugini, Colas Robert, Zhu Deng, Julia Pongratz, Raphael Ganzenmüller, Richard Fuchs, Karina Winkler, Sönke Zaehle & Clément Albergel
Additional file 1: Supplementary Information.

Additional file 1 of On the use of Earth Observation to support estimates of national greenhouse gas emissions and sinks for the Global stocktake process: lessons learned from ESA-CCI RECCAP2

Ana Bastos, Philippe Ciais, Stephen Sitch, Luiz E. O. C. Aragão, Frédéric Chevallier, Dominic Fawcett, Thais M. Rosan, Marielle Saunois, Dirk Günther, Lucia Perugini, Colas Robert, Zhu Deng, Julia Pongratz, Raphael Ganzenmüller, Richard Fuchs, Karina Winkler, Sönke Zaehle & Clément Albergel
Additional file 1: Supplementary Information.

Utopian Grammars of Human-Machine Interaction

Christopher Coenen & Aleksandra Kazakova
In his essay in the inaugural issue of this journal, Alfred Nordmann suggests that we can speak of a language of mechanics and that machines – in which, according to Franz Reuleaux, movement is domesticated or civilized – can be conceived of as structures that enable the self-expression of things, or as elements of a grammar of things. He points out that the journal is dedicated to exploring interactions between the sphere of ideas (of...

Eine Denkfabrik für die Rohstoffwende

Jana Kandarr
Der THINKTANK „Industrielle Ressourcenstrategien“ ist national und europaweit einzigartig. Hochrangige Experten aus Wissenschaft, Politik und Industrie entwickeln gemeinsam Strategien, um die Rohstoffverfügbarkeit besser im Blick zu haben und unseren Bedarf präziser abzuschätzen. Neue Wege der Kreislaufführung für Massenrohstoffe sollen beschritten und ressourceneffiziente Prozesse frühzeitig angestoßen werden.

Performance of manganese oxide sorbents for direct lithium extraction from geothermal brines

Klemens Slunitschek , Jochen Kolb & Elisabeth Eiche
Lithium is one of the critical elements for the realization of electric mobility and energy transition. With a contribution to global Li-production and recycling of less than 1% (2017), Europe depends almost entirely on Li-import. To reduce the dependency, new and unconventional Li resources are explored in the EU. One resource are highly saline brines from geothermal reservoirs of the Upper Rhine Graben (URG), characterized by Li concentrations of up to 200 mg/L. Due to...

Registration Year

  • 2022
    62
  • 2021
    9
  • 2020
    13

Resource Types

  • Text
    84

Affiliations

  • Karlsruhe Institute of Technology
    84
  • Helmholtz Association of German Research Centres
    21
  • Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
    19
  • University of Tübingen
    6
  • Helmholtz Centre for Environmental Research
    5
  • Technical University of Berlin
    5
  • University of the Free State
    4
  • Alfred Wegener Institute for Polar and Marine Research
    4
  • GEOMAR Helmholtz Centre for Ocean Research Kiel
    3
  • Forschungszentrum Jülich
    3