Browse by type "cumulativeThesis"
Now showing items 1-20 of 59
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Evaluating the potential of I-type cosmic spherules as a proxy for the Δ’17O of atmospheric O2 for reconstructing paleo-CO2 levels and GPP throughout the Phanerozoic
(2024-12-09)Entirely molten micrometeorites, termed I-type cosmic spherules, are micrometer to millimeter-sized remnants of extraterrestrial Fe, Ni-rich metal that can be recovered on Earth. I-type cosmic spherules acquire all oxygen ... -
Static and Dynamic Reservoir Characterization of the Heterogeneous Upper Jurassic Carbonate Reservoir Beneath the German Alpine Foreland Basin: A case study on a Premature Thermal Breakthrough Southeast of Munich
(2024-11-12)This study investigates the causes of an unexpected Premature Thermal Breakthrough (PTB) in a geothermal doublet located southeast of Munich. The PTB occurred after only three years of operation, which contradicts previous ... -
Laboratory studies of partially saturated infiltration dynamics in analog fractured porous rock systems - under consideration of fracture-matrix interaction and network geometry
(2024-08-09)Fractured porous rocks are abundant groundwater reservoir formations often covered by a thick, unsaturated zone. The interplay between fractures and rock matrix can significantly impede infiltration, particularly when the ... -
Temporal-Spatial Variabilities and Influencing Factors of Terrestrial Wet-Dry States and Vegetation Development: A Case Study in Northeast China
(2024-08-05)The number of hydroclimate disasters has increased dramatically since the late 20th century with profound changes in the environment. The Meteorological Drought Index facilitates long-term monitoring of wet-dry trends and ... -
High‐precision Strontium Isotope Measurements - From the Early Solar System to the Age of the Moon
(2024-07-12)Variations in the isotopic composition of extraterrestrial rocks provide crucial information about the nature and evolution of planetary building blocks, the Earth, and the Moon. In this thesis, strontium isotopic compositions ... -
Development of experimental and numerical models to predict the behavior of Kinetic Interface Sensitive (KIS) tracers for multiphase flow in porous media systems - A novel reactive tracer to measure fluid-fluid interfacial area in both static and dynamic conditions
(2024-04-12)An important aspect of understanding the behavior of a two-phase flow system is detecting and measuring the Fluid-Fluid Interfacial Area (FIFA). For example, in underground Gas/Oil/CO2 storage where two phases can co-exist, ... -
Understanding heat transport processes in shallow subground resulting from external and internal impacts
(2024-01-18)Heat conduction in the subsurface environment is the result of internal and external impacts and is governed by different forces in the short and long term. Externally, this phenomenon is related to daily temperature ... -
Use of selected anthropogenic pesticides, nutrients, and biomarkers to spatially and temporally characterize eutrophication dynamics at a shallow lake (Lake Seeburg)
(2022-11-09)Eutrophication of water bodies caused by high nutrient inputs, especially of phosphorus, is a global concern for a wide variety of ecosystems. To assess this problem, different monitoring approaches have been applied to a ... -
Pore- and core-scale studies for development of the Kinetic Interface Sensitive tracer – A novel reactive tracer technique to measure the fluid-fluid interfacial area for dynamic two-phase flow in porous media
(2022-11-04)Fluid-Fluid Interfacial Area (FIFA) is an important parameter relevant in numerous geological applications where two phases of fluids exist and interphase reactive mass transfer can happen. For example, in geological storage ... -
Characterization of Hydraulic Properties in Fractured Aquifers Using Slug Test-based Hydraulic Tomography and Thermal Tracer Tomography
(2022-10-25)Fractured aquifers are widely distributed on the earth’s surface and are frequently encountered in many underground projects, such as groundwater resource evaluation, contaminants remediation, and geothermal energy ... -
Towards a high-quality interannual to millennial ice-core based temperature reconstruction for East-Antarctica
(2022-09-16)Instrumental observations of climate cover only the past ~200 years. Our knowledge about historical natural climate variability beyond this time is exclusively based on climate proxies, stored within natural archives. ... -
Biotechnology and the socio-biological production of vulnerability. Genetically engineered cotton in Telangana, India
(2022-08-12)The use of genetically engineered (GE) crops in agriculture has been the subject of fierce controversy worldwide for decades and remains so until today. The potentials and risks of the technology are still contested and ... -
Ejecta erosion, hydrological, and chemical lake evolution in the Ries impact basin (Miocene, Germany)
(2022-04-08)To inspect past environmental changes and potential habitability, the growing interests for the ancient Martian crater lakes call for better understandings of palaeolimnological evolution of impact crater lakes. Particularly, ... -
Above- and belowground biomass and nutrient stocks in monoculture and agroforestry cacao production systems in the Alto Beni, Bolivia
(2022-03-08)There is hardly any place left on earth that can be considered untouched nature. Humans penetrate into all areas of this earth, and may it be through greenhouse gas emissions or other types of air and environmental pollution. ... -
Deep Subduction in Earth history: Seeking for traces in the sedimentary record
(2022-02-24)The global-scale horizontal movement of tectonic plates driven by the sinking of cold and dense lithosphere, known as plate tectonics, is a major process linking the Earth’s surface with mantle. Thus, plate tectonics ... -
Impacts of agricultural land acquisition for urbanization on smallholder agriculture and gender issues in affected communes: A case study in Huong Thuy town, Thua Thien Hue province, Vietnam
(2022-01-04)Abstract Agricultural Land Acquisition for Urbanization (ALAFU) is an inevitable process that has been happening around the world, especially in developing countries. It is the process by which the government acquires ... -
Designing and Piloting a household filter for the peri-urban population of Douala (Cameroon)
(2021-11-18)In rural and peri-urban regions of the developing world, many tube wells used as drinking water sources are microbially and chemically polluted. Consequently, hundreds of millions of people lack access to “safe” drinking ... -
Carbon Dioxide un ultrapotassic silicate melts: Experimental insights on solubility and decompression induced vesicle nucleation
(2021-10-01)Until today, the explosivity of volcanic eruptions cannot be forecasted by even the most modern monitoring techniques. The processes causing these events, endangering the lives of millions of people, happen deep inside the ... -
Microbial alteration of geochemical proxies in finegrained carbonate sediments during early diagenesis
(2021-07-27)Fine-grained carbonate sediments play a crucial role in the global carbon cycle and are an exceptional record of past environmental conditions. Major paleoenvironmental constraints, derived from stable isotope and trace ... -
Assessment of Drought in Grasslands: Spatio – Temporal Analyses of Soil Moisture and Extreme Climate Effects in Southwestern Mongolia
(2021-06-28)Soil moisture plays an essential key role in the assessment of hydrological and meteorological droughts that may affect a wide area of the natural grassland and the groundwater resource. The surface soil moisture distribution ...