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Performance of miniaturized atomic clocks in static laboratory and dynamic flight environments
(GPS Solutions, 2020-10-13)Miniaturized atomic clocks with high frequency stability as local oscillators in global navigation satellite system (GNSS) receivers promise to improve real-time kinematic applications. For a number of years, such oscillators ... -
Performance of the International Monitoring System Seismic Network Based on Ambient Seismic Noise Measurements
(Pure and Applied Geophysics, 2021-01-25)All nuclear explosions are banned by the Comprehensive Nuclear-Test-Ban Treaty. In the context of the treaty a verification regime was put into place to detect, locate, and characterize nuclear explosions at any time, by ... -
Performance Requirements of Membrane Reactors for the Application in Renewable Methanol Synthesis: A Techno‐Economic Assessment
(Advanced Sustainable Systems, 2022-11-09)Renewable energy carriers are expected to play a key role in the defossilization of the energy and chemical sector. For renewable methanol synthesis, membrane reactors (MR) have been tested on a laboratory‐scale with ... -
Periglaziale Deckschichten auf weichselzeitlichen Sedimenten in Polen
(E&G – Quaternary Science Journal; Vol.30, No. 1)Aus dem Gebiet der weichselzeitlichen Vereisung in Polen werden allgemein verbreitete geringmächtige periglaziale Deckschichten beschrieben. Sie zeigen in der Regel eine äolische Beeinflussung und unterscheiden sich dadurch ... -
Periglaziäre, polygonal-verzweigte rinnenförmige Bildungen und glazitektonische Strukturen in Saale-Till am Elbe-Urstomtalrand bei Wedel (Schleswig-Holstein)
(E&G – Quaternary Science Journal; Vol.64)Remarkable polygenetical structures were observed at a refinery rehabilitation site in Wedel/Holstein. The polygonal shaped, channel-like structures are incised in mid-Saalian clayey, chalk-rich till. They are symmetrically ... -
Periodic variability in active galactic nuclei
(Univ. Köln, 2008)In this doctoral thesis, multi-frequency very long baseline interferometry observations together with multi-frequency total flux-density variability data of compact relativistic jets in active galactic nuclei are presented ... -
Perlit im Gartenbau
(TELMA - Berichte der Deutschen Gesellschaft für Moor- und Torfkunde; Band 34; 2004)Abstract: After a reference to the use of perlite in horticulture genesis, mineralogy, chemistry, occurrence, processing and products with their physical and chemical characteristics are presented. In detail perlites are ... -
Permafrost am Pico de Orizaba/Mexiko
(E&G – Quaternary Science Journal; Vol.26, No. 1)Permafrost tritt in Mexiko (ca. 19° N) am Pico de Orizaba in Höhen zwischen 5000 und 4600 m auf. Der Permafrost ist fossil. Verschiedene Bodeneistypen können unterschieden werden. Die Permafrostvorkommen unterhalb der ... -
Permafrost Organic Carbon Turnover and Export Into a High‐Arctic Fjord: A Case Study From Svalbard Using Compound‐specific 14C Analysis
(Journal of Geophysical Research: Biogeosciences, 2021-03-14)In a warming climate, thawing permafrost soils in the circumpolar Arctic region are subject to enhanced microbial turnover as well as mass mobilization and other erosion processes. High‐Arctic settings such as Svalbard are ... -
Permafrost soil complexity evaluated by laboratory imaging Vis-NIR spectroscopy
(European Journal of Soil Science, 2020)The biogeochemical functioning of soils (e.g., soil carbon stabilization and nutrient cycling) is determined at the interfaces of specific soil structures (e.g., aggregates, particulate organic matter (POM) and organo-mineral ... -
Permeability estimation from induced polarization: an evaluation of geophysical length scales using an effective hydraulic radius concept
(Near Surface Geophysics, 2019)Geophysical length scales defined from induced-polarization measurements can be used in models of permeability (k) prediction. We explore the relative merit of different induced-polarization parameters as proxies of an ... -
Permeability Evolution During Shear Zone Initiation in Low-Porosity Rocks
(Rock Mechanics and Rock Engineering, 2021-02-09)Using an innovative experimental set-up (Punch-Through Shear test), we initiated a shear zone (microfault) in Flechtingen sandstone and Odenwald granite under in situ reservoir conditions while monitoring permeability and ... -
Permeability Variations in Illite-Bearing Sandstone: Effects of Temperature and NaCl Fluid Salinity
(Journal of Geophysical Research: Solid Earth, 2020)Temperature changes and variations in pore fluid salinity may negatively affect the permeability of clay-bearing sandstones with implications for natural fluid flow and geotechnical applications alike. In this study these ... -
Permokarbonische Ablagerungen in einem Pipeline-Aufschluss zwischen Homberg und Reichenbach - lithostratigraphischer und fazieller Vergleich zwischen Nahe-Mulde und Pfälzer Mulde (Saar-Nahe-Becken, SW-Deutschland)
(Mainzer geowissenschaftliche Mitteilungen; 33. 2005)Bei der Erneuerung einer Gas-Pipeline (TENP) wurden in der Pfalz fossilreiche Schichten des Ober-Karbon und Unter-Perm (Rotliegend) angeschnitten. Die umfangreichen Aufschlüsse erlaubten detailreiche stratigraphischfaz ... -
Persistent Link Between Caribbean Precipitation and Atlantic Ocean Circulation During the Last Glacial Revealed by a Speleothem Record From Puerto Rico
(Paleoceanography and Paleoclimatology, 2020-11-20)The sensitivity of tropical Atlantic precipitation patterns to the mean position of the Intertropical Convergence Zone (ITCZ) at different time scales is well‐known. However, recent research suggests a more complex behavior ... -
Persistent Provenance of South Asian Monsoon‐Induced Silicate Weathering Over the Past 27 Million Years
(Paleoceanography and Paleoclimatology, 2021-03-18)The development of the South Asian monsoon (SAM) and Himalaya‐Tibetan Plateau uplift were closely intertwined with some studies suggesting that uplift initiated the monsoon whereas others link tectonics with monsoon‐controlled ... -
Perspektiven einer nachhaltigen Meeresnutzung. Tauchen als Mensch-Natur(raum) Interaktion
(Institut für Geographie und Geologie der Universität Greifswald, 2023)Dieser Sammelband umfasst verschiedene Arbeiten zum Thema Tauchsport und dessen Einfluss auf marine Ökosysteme. Aus verschiedenen interdisziplinären Perspektiven setzen sich die Autor*innen des Bandes mit dem Nutzen des ... -
Perturbation of isotherms below topography: constraints from tunnel transects through the Alps, Gotthard road tunnel
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)For many years it has been known that near surface isotherms are influenced by the topography (Lees 1910). Recently, a number of studies were pursued to quantify the effect of topography on low temperature isotherms ... -
Pesticide contamination of the upper Elbe River and an adjacent floodplain area
(Journal of Soils and Sediments, 2020-02-06)Purpose: Pesticide contamination of river waters is a global problem, and therefore, authorities regularly monitor the water quality status. Especially, flood events might transport large pesticide loads ... -
Pesticide exposure affects reproductive capacity of common toads (Bufo bufo) in a viticultural landscape
(Ecotoxicology, 2021-01-20)Amphibian populations are declining worldwide at alarming rates. Among the large variety of contributing stressors, chemical pollutants like pesticides have been identified as a major factor for this decline. Besides direct ...