Geologie: Recent submissions
Anzeige der Dokumente 351-375 von 933
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Opportunities and Challenges for Paleoaltimetry in “Small” Orogens: Insights From the European Alps
; Ehlers, T. A.; Mutz, S. G.; ; Krsnik, E.; (Geophysical Research Letters, 2020-02-10)
Many stable isotope paleoaltimetry studies have focused on paleoelevation reconstructions of orogenic plateaus such as the Tibetan or Andean Plateaus. We address the opportunities and challenges of applying stable isotope ... -
Multitemporal terrestrial laser scanning point clouds for thaw subsidence observation at Arctic permafrost monitoring sites
; ; ; Herfort, Benjamin; Wilcox, Evan James; ; Marsh, Philip; (Earth Surface Processes and Landforms, 2020-02-21)
This paper investigates different methods for quantifying thaw subsidence using terrestrial laser scanning (TLS) point clouds. Thaw subsidence is a slow (millimetre to centimetre per year) vertical displacement of the ... -
Structural Evolution at the Northeast North German Basin Margin: From Initial Triassic Salt Movement to Late Cretaceous‐Cenozoic Remobilization
; ; ; ; ; (Tectonics, 2020-07-14)
In this study, we investigate the regional tectonic impact on salt movement at the northeastern margin of the intracontinental North German Basin. We discuss the evolution of salt pillows in the Bay of Mecklenburg in the ... -
Sedimentological Evidence for Pronounced Glacial‐Interglacial Climate Fluctuations in NE Tibet in the Latest Pliocene to Early Pleistocene
; ; ; Kaboth‐Bahr, Stefanie; Rösler, Wolfgang; ; Pross, Jörg; ; (Paleoceanography and Paleoclimatology, 2020-05-17)
The intensification of Northern Hemisphere glaciation (iNHG) and uplift of the Tibetan Plateau have been argued to be among the main drivers of climate change in midlatitude Central Asia during the Pliocene/Pleistocene. ... -
Bayesian Calibration and Validation of a Large‐Scale and Time‐Demanding Sediment Transport Model
; ; ; ; ; (Water Resources Research, 2020-07-24)
This study suggests a stochastic Bayesian approach for calibrating and validating morphodynamic sediment transport models and for quantifying parametric uncertainties in order to alleviate limitations of conventional ... -
High spatio‐temporal resolution measurements of cohesive sediment erosion
; Inskeep, Caleb; ; Schmid, Gerhard; ; (Earth Surface Processes and Landforms, 2020-06-14)
In this study, we present a novel approach to measure fundamental processes of cohesive sediment erosion. The experimental setup consists of a laboratory erosion flume (SETEG) and a photogrammetric method to detect sediment ... -
Sediment budgeting of short‐term backfilling processes: The erosional collapse of a Carolingian canal construction
; ; Rabiger‐Völlmer, Johannes; Herzig, Franz; Schneider, Birgit; ; ; Berg, Stefanie; Linzen, Sven; Ettel, Peter; Zielhofer, Christoph (Earth Surface Processes and Landforms, 2020-09-15)
Sediment budgeting concepts serve as quantification tools to decipher the erosion and accumulation processes within a catchment and help to understand these relocation processes through time. While sediment budgets are ... -
Synthetic resampling strategies and machine learning for digital soil mapping in Iran
Taghizadeh‐Mehrjardi, Ruhollah;; ; ; Jamshidi, Mohammad; Davatgar, Naser; Toomanian, Norair; (European Journal of Soil Science, 2020-01-08)
Most common machine learning (ML) algorithms usually work well on balanced training sets, that is, datasets in which all classes are approximately represented equally. Otherwise, the accuracy estimates may be unreliable ... -
Pedotransfer Function for the Brunswick Soil Hydraulic Property Model and Comparison to the van Genuchten‐Mualem Model
; ; ; ; (Water Resources Research, 2020-09-12)
Modeling soil hydraulic properties requires an effective representation of capillary and noncapillary storage and conductivity. This is made possible by using physically comprehensive yet flexible soil hydraulic property ... -
Comment on Dong and Ochsner (2018): “Soil Texture Often Exerts Stronger Influence Than Precipitation on Mesoscale Soil Moisture Patterns”
; ; (Water Resources Research, 2021-01-15)
In their study, Dong and Ochsner (2018, https://doi.org/10.1002/2017WR021692) used an extensive data set of 18 cosmic‐ray neutron rover surveys along a 150 km long transect on unpaved roads to assess the influence of ... -
Production and Transport of Supraglacial Debris: Insights From Cosmogenic 10Be and Numerical Modeling, Chhota Shigri Glacier, Indian Himalaya
; (Journal of Geophysical Research: Earth Surface, 2020-10-06)
Plain Language Summary High and steep mountain ranges are currently undergoing changes due to increasing temperatures. These changes include rapidly shrinking glaciers as well as thawing permafrost, which together destabilize ... -
Persistent Link Between Caribbean Precipitation and Atlantic Ocean Circulation During the Last Glacial Revealed by a Speleothem Record From Puerto Rico
; ; Winter, Amos; ; ; ; ; Mangini, Augusto; (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 ... -
Strategies for Simplifying Reactive Transport Models: A Bayesian Model Comparison
Schäfer Rodrigues Silva, Aline;; ; ; (Water Resources Research, 2020-11-22)
For simulating reactive transport on aquifer scale, various modeling approaches have been proposed. They vary considerably in their computational demands and in the amount of data needed for their calibration. Typically, ... -
Sediment cascades and the entangled relationship between human impact and natural dynamics at the pre‐pottery Neolithic site of Göbekli Tepe, Anatolia
; ; ; Pöllath, Nadja; ; ; Schütt, Brigitta (Earth Surface Processes and Landforms, 2020-12-05)
This study presents a meta‐analysis of radiocarbon ages for the environs of Göbekli Tepe – one of the oldest monumental structures worldwide – using cumulative probability functions to diachronically assess phases of ... -
Arctic Sea Ice in CMIP6
; Community, SIMIP (Geophysical Research Letters, 2020-05-14)
We examine CMIP6 simulations of Arctic sea‐ice area and volume. We find that CMIP6 models produce a wide spread of mean Arctic sea‐ice area, capturing the observational estimate within the multimodel ensemble spread. The ... -
Evaluating Bayesian Radiocarbon‐dated Event Count (REC) models for the study of long‐term human and environmental processes
(Journal of Quaternary Science, 2020-10-20)
Chronological uncertainty complicates attempts to use radiocarbon dates as proxies for processes such as human population growth/decline, forest fires and marine ingression. Established approaches involve turning databases ... -
Holocene Interactions Between Glacier Retreat, Sea Ice Formation, and Atlantic Water Advection at the Inner Northeast Greenland Continental Shelf
; ; ; ; Roberts, Dave H.; Callard, Louise; O'Cofaigh, Colm (Paleoceanography and Paleoclimatology, 2020-11-11)
During the past four decades significant decrease in Arctic sea ice and a dramatic ice mass loss of the Greenland Ice Sheet (GIS) has been coincident with global warming and an increase in atmospheric CO2. In Northeast ... -
Thermo‐erosional valleys in Siberian ice‐rich permafrost
Morgenstern, Anne;; Günther, Frank; Stettner, Samuel; Ramage, Justine; ; ; (Permafrost and Periglacial Processes, 2020-10-28)
Thermal erosion is a major mechanism of permafrost degradation, resulting in characteristic landforms. We inventory thermo‐erosional valleys in ice‐rich coastal lowlands adjacent to the Siberian Laptev Sea based on remote ... -
Impact of an 0.2 km3 Rock Avalanche on Lake Eibsee (Bavarian Alps, Germany) – Part II: Catchment Response to Consecutive Debris Avalanche and Debris Flow
; ; Lempe, Bernhard; (Earth Surface Processes and Landforms, 2020-11-16)
The ~0.2 km3 Eibsee rock avalanche impacted Paleolake Eibsee and completely displaced its waters. This study analyses the lake impact and the consequences, and the catchment response to the landslide. A quasi‐3D seismic ... -
Impact of an 0.2 km3 Rock Avalanche on Lake Eibsee (Bavarian Alps, Germany) – Part I: Reconstruction of the paleolake and Effects of the Impact
; Mamot, Philipp; Lempe, Bernhard; (Earth Surface Processes and Landforms, 2020-11-16)
Rock avalanches destroy and reshape landscapes in only a few minutes and are among the most hazardous processes on Earth. The surface morphology of rock avalanche deposits and the interaction with the underlying material ... -
Variable Quaternary Uplift Along the Southern Margin of the Central Anatolian Plateau Inferred From Modeling Marine Terrace Sequences
; Jara‐Muñoz, Julius; ; (Tectonics, 2020-12-08)
The southern margin of the Central Anatolian Plateau (CAP) records a strong uplift phase after the early Middle Pleistocene, which has been related to the slab break‐off of the subducting Arabian plate beneath the Anatolian ... -
Influence of Effective Stress and Pore Fluid Pressure on Fault Strength and Slip Localization in Carbonate Slip Zones
; ; ; ; ; Renner, Joerg (Journal of Geophysical Research: Solid Earth, 2020-11-05)
The presence of pressurized fluids influences the mechanical behavior of faults. To test the roles of normal stress and fluid pressure on shear strength and localization behavior of calcite gouges, we conducted a series ... -
Revealing Sediment Transport Pathways and Geomorphic Change in Washover Fans by Combining Drone‐Derived Digital Elevation Models and Single Grain Luminescence Data
May, Simon Matthias; Callow, John Nikolaus;; ; May, Jan‐Hendrik (Journal of Geophysical Research: Earth Surface, 2021-01-23)
Chronostratigraphic investigations on coastal sedimentary records such as washover fans or beach‐ridge sequences may be used to reconstruct storm chronologies on centennial to millennial time scales. However, modern analogs ... -
A new approach to classification of 40 years of Antarctic sea ice concentration data
; ; Friedl, Peter; Jacobeit, Jucundus (International Journal of Climatology, 2020-10-21)
In this paper, we present a characterization of Antarctic sea ice based on the classification of annual sea ice concentration (SIC) data from 1979 to 2018. A clustering algorithm was applied to provide a climatological ... -
Offshore Freshened Groundwater in Continental Margins
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; Martin‐Nagle, Renée; ; ; ; ; Trembath‐Reichert, Elizabeth; ; ; (Reviews of Geophysics, 2021-01-04)
First reported in the 1960s, offshore freshened groundwater (OFG) has now been documented in most continental margins around the world. In this review we compile a database documenting OFG occurrences and analyze it to ...
