Jens Hartmann
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View article: Alive and dead earthworms capture carbon during mineral weathering through different pathways
Alive and dead earthworms capture carbon during mineral weathering through different pathways Open
Enhanced rock weathering aims at capturing atmospheric carbon dioxide as inorganic carbon, while potentially stabilizing soil organic carbon. However, the role of soil biota in this process remains underexplored. Earthworms, being key soil…
View article: Alkalinity production and carbon capture from dunite weathering: Individual effects of oxalate, citrate, and EDTA salts
Alkalinity production and carbon capture from dunite weathering: Individual effects of oxalate, citrate, and EDTA salts Open
Carbon dioxide mitigation and capture technologies are crucial to keeping global warming within safe limits. Silicate weathering offers a nature-based approach for stable, long-term carbon sequestration through technologies like Carbon Cap…
View article: Multi-site deep learning for groundwater level prediction across global datasets: toward scalable applications under data scarcity
Multi-site deep learning for groundwater level prediction across global datasets: toward scalable applications under data scarcity Open
Deep learning (DL), and especially long short-term memory (LSTM) networks, have shown strong potential for groundwater level (GWL) prediction, but remain limited across sites and at scale due to data scarcity and reliance on sparse, incons…
View article: Coastal groundwater level trends reveal global susceptibility to seawater intrusion
Coastal groundwater level trends reveal global susceptibility to seawater intrusion Open
Coastal groundwater is a vital source of freshwater that is threatened by overabstraction and rising sea levels. Yet, our understanding of where global coastal groundwater levels (GWLs) are declining and what regions are susceptible to fut…
View article: Machine learning-based identification of key biotic and abiotic drivers of mineral weathering rate in a complex enhanced weathering experiment
Machine learning-based identification of key biotic and abiotic drivers of mineral weathering rate in a complex enhanced weathering experiment Open
Background The optimization of enhanced mineral weathering as a carbon dioxide removal technology requires a comprehensive understanding of what drives mineral weathering. These drivers can be abiotic and biotic and can interact with each …
View article: Pyrogenic carbon and carbonating minerals for carbon capture and storage (PyMiCCS) part II: organic and inorganic carbon dioxide removal in an Oxisol
Pyrogenic carbon and carbonating minerals for carbon capture and storage (PyMiCCS) part II: organic and inorganic carbon dioxide removal in an Oxisol Open
Enhanced rock weathering (ERW) and pyrogenic carbon capture and storage (PyCCS, or “biochar carbon removal”) are two promising carbon dioxide removal (CDR) techniques that can contribute to soil restoration. These technologies can be combi…
View article: Pyrogenic carbon and carbonating minerals for carbon capture and storage (PyMiCCS) part I: production, physico-chemical characterization and C-sink potential
Pyrogenic carbon and carbonating minerals for carbon capture and storage (PyMiCCS) part I: production, physico-chemical characterization and C-sink potential Open
Carbon dioxide removal (CDR) at gigaton-scale is essential to meet the Paris climate goals. Relevant CDR rates can only be achieved through the co-deployment of multiple CDR approaches. However, synergisms between different CDR methods and…
View article: Scientific literature on carbon dioxide removal revealed as much larger through AI-enhanced systematic mapping
Scientific literature on carbon dioxide removal revealed as much larger through AI-enhanced systematic mapping Open
View article: Stability of alkalinity in the land-ocean transition zone: a geochemical CDR perspective for the Elbe River, Germany
Stability of alkalinity in the land-ocean transition zone: a geochemical CDR perspective for the Elbe River, Germany Open
Carbon dioxide removal (CDR) strategies like enhanced weathering and river/ocean alkalinity enhancement have been suggested to increase alkalinity in rivers, coastal areas, and eventually oceans. The effectiveness and sustainability of the…
View article: Machine learning-based identification of key biotic and abiotic drivers of mineral weathering rate in a complex enhanced weathering experiment
Machine learning-based identification of key biotic and abiotic drivers of mineral weathering rate in a complex enhanced weathering experiment Open
Background The optimization of enhanced mineral weathering as a carbon dioxide removal technology requires a comprehensive understanding of what drives mineral weathering. These drivers can be abiotic and biotic and can interact with each …
View article: Ocean alkalinity enhancement in an open-ocean ecosystem: biogeochemical responses and carbon storage durability
Ocean alkalinity enhancement in an open-ocean ecosystem: biogeochemical responses and carbon storage durability Open
Ocean alkalinity enhancement (OAE) is considered for the long-term removal of gigatonnes of carbon dioxide (CO2) from the atmosphere to achieve our climate goals. Little is known, however, about the ecosystem-level changes in biogeochemica…
View article: Microbial dissolution of Gran Canaria lapilli in small-scale flow through columns: carbon dioxide removal potential
Microbial dissolution of Gran Canaria lapilli in small-scale flow through columns: carbon dioxide removal potential Open
Carbon dioxide removal technologies are urgently needed to stay within the 2 °C warming limit. This study evaluated Gran Canaria lapilli and a commercially available lava basalt as feedstocks for bio-weathering in flow-through columns inoc…
View article: Soil carbon dioxide levels control salt marsh alkalinity generation
Soil carbon dioxide levels control salt marsh alkalinity generation Open
Recent studies have highlighted salt marshes as hotspots for alkalinity generation and export to coastal waters. Several studies emphasize the critical role of anaerobic microbial metabolism as a major source of total alkalinity (TA) gener…
View article: Supplementary material to "Weathering without inorganic CDR revealed through cation tracing"
Supplementary material to "Weathering without inorganic CDR revealed through cation tracing" Open
View article: Weathering without inorganic CDR revealed through cation tracing
Weathering without inorganic CDR revealed through cation tracing Open
Enhanced Weathering using basalt rock dust is a scalable carbon dioxide removal (CDR) technique, but quantifying rock weathering and CDR rates poses a critical challenge. Here, we investigated inorganic CDR and weathering rates by treating…
View article: Pulsed field ablation using a circular electrode array catheter in patients with atrial fibrillation: A workflow optimization study evaluating the role of mapping
Pulsed field ablation using a circular electrode array catheter in patients with atrial fibrillation: A workflow optimization study evaluating the role of mapping Open
View article: Machine learning-based identification of key biotic and abiotic drivers of mineral weathering rate in a complex enhanced weathering experiment
Machine learning-based identification of key biotic and abiotic drivers of mineral weathering rate in a complex enhanced weathering experiment Open
Background The optimization of enhanced mineral weathering as a carbon dioxide removal technology requires a comprehensive understanding of what drives mineral weathering. These drivers can be abiotic and biotic and can interact with each …
View article: Surface area and Ω-aragonite oversaturation as controls of the runaway precipitation process in ocean alkalinity enhancement
Surface area and Ω-aragonite oversaturation as controls of the runaway precipitation process in ocean alkalinity enhancement Open
Ocean alkalinity enhancement (OAE) is a strategy for marine carbon dioxide removal that aims to increase the total alkalinity (TA) of seawater to sequester atmospheric CO2 in the form of dissolved inorganic carbon (DIC). An intense alkalin…
View article: Assessing the hydrothermal influence on natural waters in the Kirishima Volcanic Complex: Insights from rivers, springs and groundwater with varying residence time
Assessing the hydrothermal influence on natural waters in the Kirishima Volcanic Complex: Insights from rivers, springs and groundwater with varying residence time Open
View article: Exploring the Possibilities and Limitations of Global Model Frameworks Using Deep Learning for Groundwater Level Prediction Across Worldwide Datasets
Exploring the Possibilities and Limitations of Global Model Frameworks Using Deep Learning for Groundwater Level Prediction Across Worldwide Datasets Open
View article: How earthworms thrive and drive silicate rock weathering in an artificial organo-mineral system
How earthworms thrive and drive silicate rock weathering in an artificial organo-mineral system Open
View article: Ocean alkalinity enhancement approaches and the predictability of runaway precipitation processes: results of an experimental study to determine critical alkalinity ranges for safe and sustainable application scenarios
Ocean alkalinity enhancement approaches and the predictability of runaway precipitation processes: results of an experimental study to determine critical alkalinity ranges for safe and sustainable application scenarios Open
To ensure the safe and efficient application of ocean alkalinity enhancement (OAE), it is crucial to investigate its impacts on the carbonate system. While modeling studies reported a sequestration potential of 3–30 Gt carbon dioxide (CO2)…
View article: Word of caution: clinically apparent coronary spasm following pulsed field cavotricuspid isthmus ablation despite nitroglycerin prophylaxis - a case report
Word of caution: clinically apparent coronary spasm following pulsed field cavotricuspid isthmus ablation despite nitroglycerin prophylaxis - a case report Open
Background Pulsed field ablation (PFA) is a novel ablation technology. A rare side-effect is the occurrence of mostly subclinical coronary spasms when PF energy is applied in proximity to coronary arteries. However, it has been described t…
View article: Comment on egusphere-2024-417
Comment on egusphere-2024-417 Open
Abstract. Ocean alkalinity enhancement (OAE) is considered for the long-term removal of gigatons of carbon dioxide (CO2) from the atmosphere to achieve our climate goals. Little is known, however, about the ecos…
View article: Marine carbon dioxide removal by alkalinization should no longer be overlooked
Marine carbon dioxide removal by alkalinization should no longer be overlooked Open
To achieve the Paris climate target, deep emissions reductions have to be complemented with carbon dioxide removal (CDR). However, a portfolio of CDR options is necessary to reduce risks and potential negative side effects. Despite a large…
View article: Comment on egusphere-2023-2611
Comment on egusphere-2023-2611 Open
Abstract. To ensure the safe and efficient application of Ocean Alkalinity Enhancement (OAE), it is crucial to investigate its impacts on the carbonate system. While various modeling studies showed promising results in the…
View article: Organic carbon source controlled microbial olivine dissolution in small-scale flow-through bioreactors, for CO2 removal
Organic carbon source controlled microbial olivine dissolution in small-scale flow-through bioreactors, for CO2 removal Open
View article: Considering hydrous carbonates for ocean alkalinity enhancement
Considering hydrous carbonates for ocean alkalinity enhancement Open
Ocean Alkalinity Enhancement (OAE) emerges as a promising strategy capable of sequestering several gigatons of CO2 annually from the atmosphere and store it in the ocean for extended periods (>1000 years). To achieve this objective, artifi…
View article: Scientific literature on carbon dioxide removal much larger than previously suggested: insights from an AI-enhanced systematic map
Scientific literature on carbon dioxide removal much larger than previously suggested: insights from an AI-enhanced systematic map Open
Carbon dioxide removal (CDR) is a critical component of any strategy to limit global warming to well below 2°C and rapidly gaining attention in climate research and policymaking. Despite its importance, there have been few attempts to syst…
View article: Disentangling coastal groundwater level dynamics in a global dataset
Disentangling coastal groundwater level dynamics in a global dataset Open
Groundwater level (GWL) dynamics result from a complex interplay between groundwater systems and the Earth system. This study aims to identify common hydrogeological patterns and to gain a deeper understanding of the underlying similaritie…