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  • Journals
  • Articles  (11)
  • MDPI  (6)
  • GFZ German Research Centre for Geosciences  (4)
  • Deutsches GeoForschungsZentrum GFZ
  • 2020-2024  (11)
  • 1
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    ICDP Primer - Planning, Managing, and Executing Continental Scientific Drilling Projects (2024)
    GFZ German Research Centre for Geosciences
    Details
    Publication Date: 2024-04-29
    Description: Present day system Earth research utilizes the tool ‘Scientific Drilling’ to access samples and to monitor deep Earth processes that cannot be tackled by other scientific means. Unlike most laboratory experiments or computer modelling, drilling projects are massive field endeavours requiring intense collaboration of researchers with engineers and service providers. In the framework of the International Continental Scientific Drilling Program, ICDP, more than seventy drilling projects have been conducted, from multiyear big research programs to short, smallscale deployments such as lake drilling projects. ICDP has supported these projects not only through grants covering field-related costs, but also through a variety of scientific-technical services and support, as well as active help in data management, outreach and publication. These services are described in this booklet. Due to its instructional character, we call it the ICDP Primer.
    Language: English
    Type: info:eu-repo/semantics/book
    Format: application/pdf
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    GFZ OAI
  • 2
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    Early Jurassic Earth System and Timescale scientific drilling project (JET) – Operational Report & Explanatory Notes (2023)
    GFZ German Research Centre for Geosciences
    In:  ICDP Operational Report
    Details
    Publication Date: 2023-12-07
    Description: This report documents the drilling operations of the Early Jurassic Earth System and Timescale scientific drilling project (JET, ICDP Project: 5065). The wells 5065_1_A, 5065_1_B, 5065_1_A were drilled in 2019-2021 with the support of the International Continental Scientific Drilling Program (ICDP) and the UK Natural Environment Research Council (NERC). Alternatively, the site is known as Prees 2 (Holes A – C). Prees 1 was a nearby hydrocarbon exploration well drilled by Trend Petroleum in 1972–1973. The project aims to construct a fully integrated and astronomically calibrated timescale for the Early Jurassic, a time in Earth history during which important physical, chemical, and biological elements of the modern Earth system were initiated. The JET drilling campaign supplements the earlier Llanbedr (Mochras Farm) borehole (1967 – 1969) in NW Wales – usually known as Mo-chras – which recovered a 1.3 km thick succession comprising the Rhaetian (Upper Triassic), Hettangian, Sinemurian, Pliensbachian and Toarcian (Lower Jurassic) stages (Woodland, 1971; Hesselbo et al., 2013). Using the combined framework of Prees and Mochras, internal and ex-ternal forcing factors on the Earth system will be documented and quantified for major palaeo-environmental events, such as the Late Triassic mass extinction and the Early Toarcian Oceanic Anoxic Event, and for the more stable ‘background’ state.
    Language: English
    Type: info:eu-repo/semantics/report
    Format: application/pdf
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    GFZ OAI
  • 3
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    Dynamics and Economics of Shallow Lakes: A Survey (2021)
    MDPI
    In:  EPIC3Sustainability, MDPI, 13(24), pp. 13763-13763, ISSN: 2071-1050
    Details
    Publication Date: 2023-10-23
    Description: We provide an overview of the results devoted to the analysis of the dynamics and economics of shallow lakes, spanning the period from 1999 until now. A shallow lake serves as a typical representative of an ecological system subject to (possibly irreversible) regime shifts. The dynamics of a shallow lake are described by a non-linear model with multiple steady states and multiple domains of attraction and is thus suitable to model the evolution of an ecosystem featuring both resilience within a domain of stability and an abrupt regime shift outside of it. Beyond this, the shallow lake model can also be viewed as a metaphor for many other ecological problems. Due to the broad applicability of this model, there is substantial interest in the management of shallow lakes and both their optimal regulation and competitive usage.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
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  • 4
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    The H2020 REFLECT project: Deliverable 1.3 - Summary of gas solubility and degassing kinetics (type A) (2023)
    GFZ German Research Centre for Geosciences
    Details
    Publication Date: 2023-09-26
    Description: This report describes the activities performed within Task 1.3 “Summary of gas solubility and degassing kinetics (type A)” until the end of month 39 of the REFLECT project. Two series of experiments have been carried out that assess the degassing process of type A geothermal fluids respectively in bulk and porous media. This has resulted in an improved understanding of the process and the associated physical phenomena by utilizing experimental equipment and data analysis tools specifically created for this task.
    Language: English
    Type: info:eu-repo/semantics/report
    Format: application/pdf
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  • 5
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    The Response of Beech (Fagus sylvatica L.) Populations to Climate in the Easternmost Sites of Its European Distribution (2022)
    MDPI
    In:  EPIC3Plants, MDPI, 11(23), pp. 3310-3310, ISSN: 2223-7747
    Details
    Publication Date: 2024-04-22
    Description: In the context of forecasted climate change scenarios, the growth of forest tree species at their distribution margin is crucial to adapt current forest management strategies. Analyses of beech (Fagus sylvatica L.) growth have shown high plasticity, but easternmost beech populations have been rarely studied. To describe the response of the marginal beech population to the climate in the far east sites of its distribution, we first compiled new tree ring width chronologies. Then we analyzed climate–growth relationships for three marginal beech populations in the Republic of Moldova. We observed a relatively high growth rate in the marginal populations compared to core distribution sites. Our analyses further revealed a distinct and significant response of beech growth to all climatic variables, assessing for the first time the relationship between growth and vapor pressure deficit (VPD) which described how plant growth responds to drought. These results highlight that accumulated water deficit is an essential limiting factor of beech growth in this region. In conclusion, beech growth in the easternmost marginal population is drought-limited, and the sensitivity to VPD will need to be considered in future studies to update the forest management of other economic and ecologically important species.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 6
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    The Impact of Sea Ice Cover on Microbial Communities in Antarctic Shelf Sediments (2023)
    MDPI
    In:  EPIC3Microorganisms, MDPI, 11(6), pp. 1572-1572, ISSN: 2076-2607
    Details
    Publication Date: 2023-08-03
    Description: The area around the Antarctic Peninsula (AP) is facing rapid climatic and environmental changes, with so far unknown impacts on the benthic microbial communities of the continental shelves. In this study, we investigated the impact of contrasting sea ice cover on microbial community compositions in surface sediments from five stations along the eastern shelf of the AP using 16S ribosomal RNA (rRNA) gene sequencing. Redox conditions in sediments with long ice-free periods are characterized by a prevailing ferruginous zone, whereas a comparatively broad upper oxic zone is present at the heavily ice-covered station. Low ice cover stations were highly dominated by microbial communities of Desulfobacterota (mostly Sva1033, Desulfobacteria, and Desulfobulbia), Myxococcota, and Sva0485, whereas Gammaproteobacteria, Alphaproteobacteria, Bacteroidota, and NB1-j prevail at the heavy ice cover station. In the ferruginous zone, Sva1033 was the dominant member of Desulfuromonadales for all stations and, along with eleven other taxa, showed significant positive correlations with dissolved Fe concentrations, suggesting a significant role in iron reduction or an ecological relationship with iron reducers. Our results indicate that sea ice cover and its effect on organic carbon fluxes are the major drivers for changes in benthic microbial communities, favoring potential iron reducers at stations with increased organic matter fluxes.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 7
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    An Overview of Extreme Years in Quercus sp. Tree Ring Records from the Northern Moldavian Plateau (2023)
    MDPI
    In:  EPIC3Forests, MDPI, 14(5), pp. 894-894, ISSN: 1999-4907
    Details
    Publication Date: 2024-04-22
    Description: In this study, we made use of a regional oak tree-ring network from six stands that cover the northern Moldavian Plateau (eastern Europe) to analyze how different tree ring parameters (i.e., early wood tree-ring width, late wood tree-ring width, and total tree-ring width) of Quercus sp. are influenced by the occurrence of extreme climatic events (e.g., long-lasting drought events). In order to explore the influence of extreme hydroclimatic events on tree ring width, we have selected each of the six most extreme positive and negative years of tree growth and addressed the seasonal cycle of tree growth in comparison with the main climatic parameters, then evaluated both the current and lagged consequences of extreme hydroclimatic events on tree ring width and the capacity of trees to recover. Our results indicate that the variability of oak tree ring width from the Moldavian Plateau is mainly influenced by the availability of water resources, and that an important limiting growth factor for Quercus sp. is the occurrence of long-lasting drought events, e.g., at least two years in a row with severe drought conditions.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 8
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    The H2020 REFLECT project: Deliverable D2.3 – Mineral solubility and precipitation at high salinities (2023)
    GFZ German Research Centre for Geosciences
    Details
    Publication Date: 2023-04-06
    Description: Deliverable D2.3 reports the work performed in task 2.3 “Metal complexation and mineral precipitation” within the Reflect project. The task is divided into the subtasks 2.3.1 “Mineral solubility and precipitation kinetics”, 2.3.2 “Mineral precipitation by impedance spectroscopy” and 2.3.3 “Modelling mineral solubility”. A combination of experimental design, performed experiments and numerical modelling have increased the knowledge of mineral solubility and precipitation at high salinity condition in geothermal fluids.
    Language: English
    Type: info:eu-repo/semantics/report
    Format: application/pdf
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  • 9
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    System Erde : Ressource, Regulator, Risiko: Wasser im System Erde (2023)
    Deutsches GeoForschungsZentrum GFZ
    Details
    Publication Date: 2023-08-15
    Description: Mit dem Journal „System Erde“ berichtet das Deutsche GeoForschungsZentrum GFZ über die unterschiedlichen Facetten seiner Forschungsarbeiten. Die Reihe richtet sich vor allem an Entscheiderinnen und Entscheider in Wissenschaft, Gesellschaft und Politik, an interessierte Wissenschaftlerinnen und Wissenschaftler sowie an die fachinteressierte Öffentlichkeit.
    Language: German
    Type: info:eu-repo/semantics/other
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  • 10
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    Defining a Precipitation Stable Isotope Framework in the Wider Carpathian Region (2022)
    MDPI
    In:  EPIC3Water, MDPI, 14(16), pp. 2547-2547, ISSN: 2073-4441
    Details
    Publication Date: 2024-04-22
    Description: The eastern part of Europe is very poorly represented in the Global Network for Isotopes in Precipitation (GNIP) database, mainly because the monitoring of the stable isotopes in precipitation started only recently compared with other regions. In this respect, the main objective of this article is to fill the gap in the GNIP database over the eastern part of Europe and show the temporal variability and potential drivers of an extended network of δ18O values in precipitation collected from 27 locations in Romania and the Republic of Moldova. We also present the first high-resolution map of the spatio-temporal distribution of δ18O values in precipitation in Romania and the Republic of Moldova, according to an observational dataset. According to our results, the stations from western and northern Romania tend to have LMWLS with higher values than those from southwestern Romania. The monthly variation of the δ18O and δ2H showed a clearly interannual variation, with distinct seasonal differences, following the seasonal temperatures. The analysis of the spatial distribution of stable isotopes in precipitation water was made on the basis of both observational data and modeled data. This allowed us to study the origin of the air moisture and the interaction with regional and local patterns and to analyze the link between the spatial δ18O variations and the large-scale circulation patterns on a seasonal scale.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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