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State shifts in the deep Critical Zone drive landscape evolution in volcanic terrains.
Proc Natl Acad Sci U S A
January 2025
Department of Earth Sciences, University of Oregon, Eugene, OR 97403.
Volcanic provinces are among the most active but least well understood landscapes on Earth. Here, we show that the central Cascade arc, USA, exhibits systematic spatial covariation of topography and hydrology that are linked to aging volcanic bedrock, suggesting systematic controls on landscape evolution. At the Cascade crest, a locus of Quaternary volcanism, water circulates deeply through the upper [Formula: see text]1 km of crust but transitions to shallow and dominantly horizontal flow as rocks age away from the arc front.
View Article and Find Full Text PDFSensitivity of Band-Pass Filtered In Situ Low-Earth Orbit and Ground-Based Ionosphere Observations to Lithosphere-Atmosphere-Ionosphere Coupling Over the Aegean Sea: Spectral Analysis of Two-Year Ionospheric Data Series.
Sensors (Basel)
December 2024
Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Ul. Oczapowskiego 2, 10-719 Olsztyn, Poland.
This study demonstrates a rich complexity of the time-frequency ionospheric signal spectrum, dependent on the measurement type and platform. Different phenomena contributing to satellite-derived and ground-derived geophysical data that only selected signal bands can be potentially sensitive to seismicity over time, and they are applicable in lithosphere-atmosphere-ionosphere coupling (LAIC) studies. In this study, satellite-derived and ground-derived ionospheric observations are filtered by a Fourier-based band-pass filter, and an experimental selection of potentially sensitive frequency bands has been carried out.
View Article and Find Full Text PDFThe climatic pattern of East Asia shifted in response to cratonic thinning in the Early Cretaceous.
Commun Earth Environ
November 2024
School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100010 China.
Article Synopsis
- The North China Craton saw geological changes due to the westward subduction of the Paleo-Pacific, leading to the uplift of a coastal plateau and subsequent subsidence in the Early Cretaceous, which may have altered climate patterns.
- The study examines oxygen isotope ratios in garnets to understand mineralization fluids during this tectonic shift, revealing a span from -11.4 to +13.5‰, with low ratios indicating significant input from rain and lake waters in the northern area.
- Climate modeling suggests that the uplifted coastal plateau enhanced moisture transport from the tropical Tethyan Ocean, influencing the island's climatic patterns as the region's lithosphere thinned and Pacific factors became more prominent.
The macroecology of Mesozoic dinosaurs.
Biol Lett
November 2024
Department of Earth Sciences, University College London, Gower Pl, London WC1E 6BS, UK.
Dinosaurs thrived for over 160 million years in Mesozoic ecosystems, displaying diverse ecological and evolutionary adaptations. Their ecology was shaped by large-scale climatic and biogeographic changes, calling for a 'deep-time' macroecological investigation. These factors include temperature fluctuations and the break up of Pangaea, influencing species richness, ecological diversity and biogeographic history.
View Article and Find Full Text PDFDating drainage reversal using mineral provenance along the Yangsan Fault, South Korea.
Sci Rep
September 2024
Université de Paris Cité, Institut de Physique du Globe de Paris, CNRS, Paris, France.
Article Synopsis
- * Research at the Yangsan Fault in South Korea used OSL dating and zircon analysis to study sediment layers, showing significant changes in sediment sources and drainage patterns.
- * The study suggests that these landscape changes occurred around 70,000 years ago, influenced by slow earthquake activity and reduced river erosion during a cold period known as MIS4.
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