Article
Environmental Sciences
Kateryna Lubyk, Mohammed Mainul Hoque, Claudia Stolle
Summary: Statistical analysis of the main ionospheric trough was conducted using K-band ranging system measurements from the GRACE satellite constellation. The characteristics and parameters of the mid-latitude ionospheric trough were studied.
Article
Geosciences, Multidisciplinary
Simona Caruso, Vittorio Maselli, Brice Rea, Matteo Spagnolo
Summary: This study presents an analysis of the seismic reflection dataset of the Foula wedge, revealing the complex depositional processes and geomorphic evolution of this sedimentary depocenter.
Article
Geosciences, Multidisciplinary
Jiawei Jiang, Hu Liu, Qingfeng Jiang, Yuan-Pin Chang, Mu Song, Bowen Meng, Huanye Wang, Yunning Cao, Ji Shen, Sergey Krivonogov, Weiguo Liu, Zhonghui Liu
Summary: Research has shown that meltwater played a significant role in the water budget of lakes in Central Asia and monsoonal Asia during the early Holocene, accompanied by climate warming. This has important implications for hydrological reconstructions and future hydroclimatic projections.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Engineering, Aerospace
Juan Manuel Castano, Maria Paula Natali, Amalia Meza
Summary: In this study, the behavior of the mid-latitude ionospheric trough (MIT) during solar cycle 24 was analyzed using Global Ionospheric Maps (GIMs). The MIT position shows asymmetry between the Northern and Southern Hemispheres, with equatorward movement during high solar activity. In addition, there is a clear dependence between MIT position and solar wind speed and IMF Bz-component at certain time scales.
ADVANCES IN SPACE RESEARCH
(2021)
Article
Environmental Sciences
J. J. Major, K. R. Spicer, A. R. Mosbrucker
Summary: The cataclysmic eruption of Mount St. Helens in 1980 drastically changed the upper North Fork Toutle River valley, leading to the formation of a new channel system. Flood events from 1996 to 2015 have shown that the effectiveness of floods in this environment is influenced by both geomorphic and environmental factors. Strong coupling, local geologic and hydraulic conditions, event sequencing, and possibly a longitudinal gradient in stream power are important factors affecting event effectiveness on channel modification.
WATER RESOURCES RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
DongJoo Joung, Carolyn Ruppel, John Southon, Thomas S. Weber, John D. Kessler
Summary: Naturally occurring gas hydrates may contribute to global warming, but our study found that methane emissions from seep fields along the US Atlantic and Pacific margins are primarily concentrated in shallower water columns, with no evidence of methane reaching surface waters in deeper water columns when the water-column depth is greater than 430 +/- 90 m.
Article
Geography, Physical
Andrew M. W. Newton, Mads Huuse, David R. Cox, Paul C. Knutz
Summary: The Melville Bugt Trough Mouth Fan in offshore northwest Greenland is a common sedimentary feature that records the advance and retreat of ice sheets across the continental shelf since approximately 2.7 million years ago; the evolution of the continental shelf can be summarized into four stages, controlled by factors such as ice sheet erosion, topographic forcing of ice stream flow, and glacigenic deposition.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
Xu Wang, Lifeng Zhang, Yuan Wang, Yun Zhang
Summary: This study investigates the influence of a mid-latitude trough on the gravity waves generated by Typhoon Lekima. It is found that the trough enhances the intensity of the gravity waves and they propagate in a similar pattern and phase speed as the waves generated by the typhoon. The peak intensity of the gravity waves is mainly caused by in-phase superposition.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Astronomy & Astrophysics
J. M. Weygand, I Zhelavskaya, Y. Shprits
Summary: This study compared the location of the mid-latitude trough with plasmapause boundaries using various methods and found good agreement in most cases, especially under dynamic conditions. The mid-latitude trough can serve as an additional means of identifying the plasmapause boundary, providing valuable information during periods when spacecraft observations are not available.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2021)
Article
Environmental Sciences
Na Yang, Tao Yu, Huijun Le, Libo Liu, Yang-Yi Sun, Xiangxiang Yan, Jin Wang, Chunliang Xia, Xiaomin Zuo, Guangliang Huang
Summary: This study investigates the features of the ionospheric mid-latitude trough over North America using MIT total electron content data. It is found that the mid-latitude trough position moves equatorward during geomagnetic storms and the ionospheric behavior around it displays three kinds of storm effects.
Article
Meteorology & Atmospheric Sciences
Xu Wang, Lifeng Zhang, Yuan Wang, Yun Zhang
Summary: The characteristics of gravity waves in the lower stratosphere produced by Typhoon Lekima after its landfall were studied using simulations. The waves were found to have a significant wavelength and period, as well as being influenced by a westerly trough at mid-latitude. The reconstruction of the waves revealed variations in frequency and meridional wavenumber, with peak intensities correlating with the movements of the jet stream and the trough.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Geosciences, Multidisciplinary
Stephen G. Blanton, Katheryn R. Kolesar, David A. Jaffe
Summary: The Keeler Dunes Complex in California is an active dunefield that is thought to receive sediment from the nearby Owens Lake playa. However, this study found that the sediment actually comes from the Slate Canyon alluvial fan. The construction of highway diversion berms altered the flow of sediment and contributed to the morphogenesis of the dunes.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Astronomy & Astrophysics
K. E. Williams, C. M. Dundas, M. A. Kahre
Summary: In this study, the ice ablation rates of mid-latitude scarps on Mars were modeled. The orientation and growth of these scarps can be explained by energy balance models, given certain characteristics of their geographic setting.
Article
Environmental Sciences
Ting Ding, Xiang LI, Hui Gao
Summary: An unprecedented autumn high temperature event occurred in southern China in September-early October 2021, which was caused by the combined impacts of the western Pacific subtropical high and the mid-latitude trough over the east of Japan.
ADVANCES IN CLIMATE CHANGE RESEARCH
(2022)
Article
Soil Science
Chen Shi, Yunyun Ban, Qiuhong Tang
Summary: A method based on laboratory experiments was proposed to predict sediment transport capacity by calculating thawed soil depth, showing high predictive ability with R-2 values of 0.99 and 0.98 when compared with laboratory measurements. This research contributes to understanding soil erosion processes by meltwater on partially thawed soil slopes.
SOIL & TILLAGE RESEARCH
(2021)
Article
Geology
Faye Walker, Nick Schofield, John Millett, Dave Jolley, Simon Holford, Sverre Planke, Dougal A. Jerram, Reidun Myklebust
Summary: This study presents the first high-resolution three-dimensional reconstruction of an ancient volcanic plumbing system, revealing a large laccolithic complex formed incrementally through amalgamation of smaller intrusions. Seismic reflection and gravity data show that the complex fed surface volcanism and an extensive sill network, with numerous sills indicating magma stalling at different levels during ascent. This research provides insight into the multicomponent plumbing system within a large ancient shield volcano for the first time.
Article
Geography, Physical
B. Bellwald, S. Planke, S. Polteau, N. Lebedeva-Ivanova, J. Faleide, S. M. Morris, S. Morse, S. Castelltort
Summary: The study describes the morphology and formation of the Bjornelva River Valley in the SW Barents Sea, suggesting it may represent a braided river system fed by outburst floods from a glacial lake. The valley's configuration could be useful for geohazard assessments in areas at risk of outburst flooding today and as an analogue for landscapes evolving in regions currently covered by ice sheets.
JOURNAL OF GLACIOLOGY
(2021)
Article
Geography, Physical
Lucas Pinto Heckert Bastos, Rene Rodrigues, Egberto Pereira, Sergio Bergamaschi, Carmen Lucia Ferreira Alferes, Lars Eivind Augland, Mathew Domeier, Sverre Planke, Henrik Hovland Svensen
Summary: The evolution and demise of the Irati-Whitehill sea can be unraveled through the study of organic geochemical characteristics and tephrochronology, constrained by new high-resolution chemostratigraphic data, the evolution of the sea is divided into five stages.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geochemistry & Geophysics
R. S. Barrett, B. Bellwald, P. J. Talling, A. Micallef, F. Gross, C. Berndt, S. Planke, R. Myklebust, S. Krastel
Summary: Submarine landslides can be significantly larger than their terrestrial counterparts and can pose significant hazards across entire ocean basins. The failure mechanism strongly controls the associated tsunami hazard. The Tampen Slide, one of the largest landslides on Earth, was found to have failed mainly as a single volume along a single failure surface, differing significantly from other giant submarine landslides that seem to have failed in multiple phases and involving multiple failure surfaces.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geography, Physical
F. J. Rodriguez-Tovar, J. Dorador, V Zuchuat, S. Planke, O. Hammer
Summary: The study focuses on the ichnological analysis of an extended upper Permian - Lower Triassic succession from the DD-1 core, drilled in Deltadalen, Central Spitsbergen. Variations in degree of bioturbation and ichnodiversity across the Permian-Triassic transition allow for the characterization of pre-, syn-, and post-EPME phases.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geochemistry & Geophysics
Thea Sveva Faleide, Alvar Braathen, Isabelle Lecomte, Mark Joseph Mulrooney, Ivar Midtkandal, Aina Juell Bugge, Sverre Planke
Summary: Interpreting normal faults faces challenges and pitfalls related to objective and subjective uncertainties. Testing interpretations were classified into 10 scenarios with different fault geometries, utilizing seismic modelling to investigate detailed fault architectures. High-resolution seismic data combined with modelling enhances confidence in conventional seismic interpretation in the same area.
Article
Geochemistry & Geophysics
Anett Blischke, Bryndis Brandsdottir, Martyn S. Stoker, Carmen Gaina, Ogmundur Erlendsson, Christian Tegner, Saemundur A. Halldorsson, Helga M. Helgadottir, Bjarni Gautason, Sverre Planke, Anthony A. P. Koppers, John R. Hopper
Summary: Volcanostratigraphic and igneous province mapping of the Jan Mayen microcontinent and Iceland Plateau Rift region provide new insights into the development of rift systems during breakup processes, revealing two breakup events, seven distinct tectono-magmatic phases, and four rift zones.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Geosciences, Multidisciplinary
Faye Walker, Nick Schofield, John Millett, David Jolley, Sverre Planke, Simon Holford
Summary: Incised drainage systems can record ancient vertical crustal motion. A newly identified incised drainage system in the Faroe-Shetland Basin formed during a period of rapid uplift about 56 million years ago. This erosional surface is a composite feature, influenced by igneous intrusions, and records prolonged regional uplift.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2022)
Article
Geosciences, Multidisciplinary
Ben Manton, Philipp Muller, Adriano Mazzini, Dmitry Zastrozhnov, Dougal A. Jerram, John M. Millett, Daniel W. Schmid, Christian Berndt, Reidun Myklebust, Sverre Planke
Summary: Ancient and modern hydrothermal venting systems are related, as evidenced by the morphological similarities between the offshore mid-Norway vent complex and the Java venting system. Both systems are formed through the transport and eruption of fluidized sediments.
Article
Geosciences, Multidisciplinary
R. Muller, T. G. Klausen, L. H. Line, A. Hafeez, S. Planke, F. Eide, E. Stueland, J. Jahren, B. Rismyhr, S. Olaussen
Summary: This study focuses on the tectono-stratigraphic evolution of the Realgrunnen Subgroup in the Barents Sea, identifying seven major phases of deposition and non-deposition/erosion. The results are crucial for exploration and production in the Hoop Area and provide insights into the evolution of ultra-condensed successions during periods of non-deposition.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Gabriel M. Marins, Yaro Parizek-Silva, John M. Millett, Dougal A. Jerram, Lucas M. M. Rossetti, Ariany de Jesus e Souza, Sverre Planke, Leandro A. Bevilaqua, Isabela de O. Carmo
Summary: This study provides a comprehensive evaluation of volcanic reservoirs in offshore oil fields in Brazil, revealing the key role of primary volcanic facies and subsequent alteration history in determining reservoir properties.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Hans Jorgen Kjoll, Ivar Midtkandal, Sverre Planke, John Millett, Ben Manton, Kresten Anderskouv
Summary: This study describes and deciphers a late Maastrichtian to Danian-aged basin-floor depositional system in the deep outer More Basin, mid-Norwegian margin. The study integrates and utilizes wireline geophysical logs, detailed petrographic observations from side-wall cores, and seismic analysis. The research provides insights into sediment transport, provenance, and depositional processes in a pre-breakup source-to-sink sedimentary system near an infant ocean's breakup axis.
Article
Geosciences, Multidisciplinary
Christian Berndt, Sverre Planke, Carlos A. Alvarez A. Zarikian, Joost Frieling, Morgan T. T. Jones, John M. M. Millett, Henk Brinkhuis, Stefan Bunz, Henrik H. H. Svensen, Jack Longman, Reed P. P. Scherer, Jens Karstens, Ben Manton, Mei Nelissen, Brandon Reed, Jan Inge Faleide, Ritske S. S. Huismans, Amar Agarwal, Graham D. M. Andrews, Peter Betlem, Joyeeta Bhattacharya, Sayantani Chatterjee, Marialena Christopoulou, Vincent J. J. Clementi, Eric C. C. Ferre, Irina Y. Y. Filina, Pengyuan Guo, Dustin T. T. Harper, Sarah Lambart, Geoffroy Mohn, Reina Nakaoka, Christian Tegner, Natalia Varela, Mengyuan Wang, Weimu Xu, Stacy L. L. Yager
Summary: Widespread shallow-water hydrothermal venting in the North Atlantic, probably a source of methane, coincided with the onset of the Palaeocene-Eocene Thermal Maximum. This venting occurred around 56 million years ago and was caused by carbon input into the ocean and atmosphere, leading to a global warming event. The vents erupted in shallow water, resulting in the direct release of volatile emissions without oxidation to CO2, and played a key role in the carbon-cycle perturbation.
Article
Geology
Benjamin Bellwald, Valentin Nigg, Stefano C. Fabbri, Lukas W. M. Becker, Adrian Gilli, Flavio S. Anselmetti
Summary: This study aims to evaluate the paleoseismic activity in southeastern Switzerland by analyzing the sedimentary record of Lake Silvaplana. The analysis of acoustic exploration data from the lake floor reveals that four large landslide events have occurred in the last 1400 years, which is consistent with sediment records from other lakes. This provides a reliable record of seismic activity during the mid and Late Holocene in the region, likely related to the neotectonic activity of the Engadine Line.
Article
Geosciences, Multidisciplinary
Morgan T. Jones, Ella W. Stokke, Alan D. Rooney, Joost Frieling, Philip A. E. Pogge von Strandmann, David J. Wilson, Henrik H. Svensen, Sverre Planke, Thierry Adatte, Nicolas Thibault, Madeleine L. Vickers, Tamsin A. Mather, Christian Tegner, Valentin Zuchuat, Bo P. Schultz
Summary: There is a temporal correlation between the peak activity of the North Atlantic Igneous Province (NAIP) and the Paleocene-Eocene Thermal Maximum (PETM), suggesting that the NAIP may have initiated and/or prolonged this extreme warming event. However, corroborating a causal relationship is hampered by a scarcity of expanded sedimentary records that contain both climatic and volcanic proxies.
CLIMATE OF THE PAST
(2023)
