Browsing by Title
Now showing items 4128-4147 of 5721
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Qualitative und quantitative petrographische Untersuchungen der Kohlen aus den flözführenden Schichten der Antioquia-Formation/Kolumbien
(1980)Es wurde eine geologische Obersicht der Amaga-Mulde aufgestellt, wobei die kohlenführende Antioquia-Formation besonders behandelt wurde. Die Ergebnisse wurden in einer geologischen und einer tektonischen Karte sowie in ... -
Qualitätsanforderungen des Erwerbsgartenbaues an Kultursubstrate - Einfluß der Gewinnungsverfahren auf die Eigenschaften der Torfe
(TELMA - Berichte der Deutschen Gesellschaft für Moor- und Torfkunde; Band 23; 1993)Der Erwerbsgärtner verlangt heute Substrate mit hoher Kultursicherheit. Dabei müssen die Kultursubstrate unter allen Anbaubedingungen zum Erfolg führen. Der Hochmoortorf erfüllt als Substratgrundlage diese Bedingungen in ... -
Quality assessment of replacement stones for the Cologne Cathedral: mineralogical and petrophysical requirements
(Environmental Earth Sciences, 2011)Owing to its long building history, different types of building stones comprised the construction of the Cologne Cathedral. Severe damage is observed on the different stones, e.g., sandstones, carbonate, and volcanic rocks, ... -
Quantification and sensitivity of fault seal parameters demonstrated in an integrated reservoir modelling work flow. A case study on the Njord Field, Halten Terrace, Norway
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)The primary objective of this paper is to present a fault seal case study from the Njord Field, offshore Norway. The study utilised analogue field studies as well as core descriptions and petrophysical well data in order ... -
Quantification of Evaporation and Drainage Processes in Unsaturated Porous Media Using Magnetic Resonance Imaging
; Hille‐Reichel, Andrea; Zehe, Erwin; ; (Water Resources Research, 2020-03-01)
The water loss in packed beds was studied spatially and time‐resolved via magnetic resonance imaging on the pore scale. The packed beds were measured under water‐saturated and unsaturated conditions, while the magnetic ... -
Quantification of Hyporheic Nitrate Removal at the Reach Scale: Exposure Times Versus Residence Times
; ; ; ; (Water Resources Research, 2019)
The rate of biogeochemical processing associated with natural degradation and transformation processes in the hyporheic zone (HZ) is one of the largest uncertainties in predicting nutrient fluxes. We present a lumped ... -
Quantification of submarine degassing of Panarea Vol. ano in the Aeolian archipelago, Italy
(Freiberg Online Geosciences; Vol. 23.2009) -
Quantifying Convective Aggregation Using the Tropical Moist Margin's Length
; ; (Journal of Advances in Modeling Earth Systems, 2020)
On small scales, the tropical atmosphere tends to be either moist or very dry. This defines two states that, on large scales, are separated by a sharp margin, well identified by the antimode of the bimodal tropical column ... -
Quantifying Flood Vulnerability Reduction via Private Precaution
; ; ; ; (Earth's Future, 2019-03-04)
Private precaution is an important component in contemporary flood risk management and climate adaptation. However, quantitative knowledge about vulnerability reduction via private precautionary measures is scarce and their ... -
Quantifying longevity and circularity of copper for different resource efficiency policies at the material and product levels
; (Journal of Industrial Ecology, 2021-02-06)
Resource efficiency strategies are emerging on policy agendas worldwide. Commonly, resource efficiency policies aim at decreasing losses at the waste management stage and, thus, diverge from public interest in more ... -
Quantifying Nitrous Oxide Emissions in the U.S. Midwest: A Top‐Down Study Using High Resolution Airborne In‐Situ Observations
; Roiger, Anke; Kostinek, Julian; ; ; Knote, Christoph; ; Ogle, Stephen M.; ; ; (Geophysical Research Letters, 2021-03-06)
The densely farmed U.S. Midwest is a prominent source of nitrous oxide (N2O) but top‐down and bottom‐up N2O emission estimates differ significantly. We quantify Midwest N2O emissions by combining observations from the ... -
Quantifying Progress Across Different CMIP Phases With the ESMValTool
; ; ; Barreiro, M.; ; Jones, C.; ; Predoi, V.; ; (Journal of Geophysical Research: Atmospheres, 2020-10-27)
More than 40 model groups worldwide are participating in the Coupled Model Intercomparison Project Phase 6 (CMIP6), providing a new and rich source of information to better understand past, present, and future climate ... -
Quantifying Tectonic and Glacial Controls on Topography in the Patagonian Andes (46.5°S) From Integrated Thermochronometry and Thermo‐Kinematic Modeling
;; ; ; ; (Journal of Geophysical Research: Earth Surface, 2021-07-28)
The Patagonian Andes have been used to illustrate the dependency of major topographic changes in response to glacial erosion processes dominating over tectonic deformation and uplift. Here, we investigate tectonic and ... -
Quantifying the Central European Droughts in 2018 and 2019 With GRACE Follow-On
; ; ; (Geophysical Research Letters, 2020)
The GRACE-FO satellites launched in May 2018 are able to quantify the water mass deficit in Central Europe during the two consecutive summer droughts of 2018 and 2019. Relative to the long-term climatology, the water mass ... -
Quantifying the Effects of EMIC Wave Scattering and Magnetopause Shadowing in the Outer Electron Radiation Belt by Means of Data Assimilation
; ; ; (Journal of Geophysical Research: Space Physics, 2020)
In this study we investigate two distinct loss mechanisms responsible for the rapid dropouts of radiation belt electrons by assimilating data from Van Allen Probes A and B and Geostationary Operational Environmental ... -
Quantifying the impact of chemicals on stable carbon and oxygen isotope values of raw pollen
; Hennig, Julian; Riedel, Frank; Helle, Gerhard (Journal of Quaternary Science, 2021-03-23)
Purification protocols to extract pollen from lake sediments contain chemicals that alter the carbon and oxygen pollen‐isotope values according to pollen characteristics and family affiliation. Modern (raw) pollen of ... -
Quantifying Uncertainties in Snow Depth Mapping From Structure From Motion Photogrammetry in an Alpine Area
; (Water Resources Research, 2019)
Mapping snow conditions in alpine areas is crucial for monitoring local hydrology to support water resource management decisions. Recently, the use of structure-from-motion multiview stereo 3-D reconstruction (or SFM ... -
Quantitative Analysen magmatischer Gesteine mittels reflexionsspektroskopischer Infrarot-Messungen
(GFZ, Helmholtz-Zentrum, 2004)The objective of this research is the quantification of modal composition of magmatic rocks using infraredspectra and based on spectral analysis of individual minerals. For that purpose a new, model-based spectralunmixing ... -
Quantitative Analysis of the Misorientation Distribution After the Recrystallisation of Tensile Deformed Copper Single Crystals
(Textures and microstructures, 1991)Recrystallisation experiments in tensile deformed <100>- and <111>-oriented single crystals of high purity copper yielded very accurate information about the orientations of recrystallised grains and deformation microstructure. ... -
Quantitative assessment of carbon sequestration reduction induced by disturbances in temperate Eurasian steppe
Chen, Yizhao; Ju, Weimin; Groisman, Pavel; Li, Jianlong; Propastin, Pavel; Xu, Xia; Zhou, Wei; (Environmental Research Letters, 2017)
The temperate Eurasian steppe (TES) is a region where various environmental, social, and economic stresses converge. Multiple types of disturbance exist widely across the landscape, and heavily influence carbon cycling ...
