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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 ... -
Peter Polis (1869–1929) Meteorologe und Mitgründer der DGG
(Mitteilungen der Deutschen Geophysikalischen Gesellschaft; Band 2; 2021)Aus Anlass des 100. Jahrestages der Gründung der Deutschen Geophysikalischen Gesellschaft im Jahre 1922 in Leipzig erschien im Verlag Edition am Gutenbergplatz Leipzig das Taschenbuch „Wiechert, Mintrop & Co. – Die ... -
Petrogenesis of a late-stage calc-alkaline granite in a giant S-type batholith: geochronology and Sr–Nd–Pb isotopes from the Nomatsaus granite (Donkerhoek batholith), Namibia
(International Journal of Earth Sciences, 2021-04-07)The late-tectonic 511.4 ± 0.6 Ma-old Nomatsaus intrusion (Donkerhoek batholith, Damara orogen, Namibia) consists of moderately peraluminous, magnesian, calc-alkalic to calcic granites similar to I-type granites worldwide. ... -
Petrogenesis of main group pallasite meteorites based on relationships among texture, mineralogy, and geochemistry
(Meteoritics & Planetary Science, 2019-09-29)Main group pallasite meteorites are samples of a single early magmatic planetesimal, dominated by metal and olivine but containing accessory chromite, sulfide, phosphide, phosphates, and rare phosphoran olivine. They ... -
Petrographical and petrophysical properties of sandstones: statistical analysis as an approach to predict material behaviour and construction suitability
(Environmental Earth Sciences, 2012)Most studies dealing with material properties of sandstones are based on a small data set. The present study utilizes petrographical and petrophysical data from 22 selected sandstones and ~300 sandstones from the literature ... -
Petrographische und geochemische Untersuchungen an drei Graniten im Nationalpark Bayerischer Wald
(Berliner geowissenschaftliche Abhandlungen. Reihe A, Geologie und Paläontologie; Band 27, 1980)Im Mittelpunkt der Betrachtungen steht ein im Östlichen Teil des Nationalparks Bayerischer Wald auftretender Granitkomplex, der sich aus drei Granittypen zusammensetzt, die im Verlauf der varistischen Orogenese ... -
Petrology, Geochemistry, and Geodynamic Implications of Basaltic Dyke Swarms from the Southern Continental Part of the Cameroon Volcanic Line, Central Africa
(The Open Geology Journal, 2012)Basaltic dyke swarms in the southern continental part of the Cameroon Volcanic Line (Bangangte, Dschang, Manjo areas) are tholeiitic in composition with 46 to 50 wt.% SiO 2 and have moderate Mg-numbers (53–59), ... -
Petrology, magnetostratigraphy and geochronology of the Miocene volcaniclastic Tepoztlán Formation: implications for the initiation of the Transmexican Volcanic Belt (Central Mexico)
(Bulletin of Volcanology, 2010)The volcaniclastic Tepoztlán Formation (TF) represents an important rock record to unravel the early evolution of the Transmexican Volcanic Belt (TMVB). Here, a depositional model together with a chronostratigraphy of this ...