Results 171 to 180 of about 610 (248)

Amino acids in the Tagish meteorite. [PDF]

Proc Natl Acad Sci U S A, 2020
Bada JL.
europepmc   +1 more source

Barium Isotopes Indicate Spatiotemporal Heterogeneity of Marine Primary Productivity During the Toarcian Oceanic Anoxic Event

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract The Toarcian Oceanic Anoxic Event (T‐OAE, ∼183 Ma) was characterized by globally enhanced organic‐carbon burial and a negative carbon‐isotope excursion (N‐CIE). However, the role of marine productivity at this time, and its spatiotemporal variability, is unclear.
Wenhan Chen, David B. Kemp, Hugh C. Jenkyns, Stuart A. Robinson, Yibo Lin, Jun Hu, Zhong Han, Tianchen He, Feifei Zhang, Xilei Sun, Guangyu Shi, Chao Li   +11 more
wiley   +1 more source

Discovery of Repeating Shallow Moonquakes in the Apollo Lunar Seismic Data

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract Shallow moonquakes have been considered unique due to their large magnitudes and affinities with intraplate earthquakes. However, the small number of detections (<80 events) has prevented detailed characterization. In this study, I identified a pair of repeating shallow moonquakes by analyzing a recently updated moonquake data set.
Keisuke Onodera
wiley   +1 more source

A Multi-Feature Fusion-Based Two-Stage Method for Airport Crater Extraction from Remote Sensing Images. [PDF]

Entropy (Basel)
Zhao Y, Chen D, Gong J.
europepmc   +1 more source

Radon‐222 as an Effective Tracer to Distinguish Groundwater Circulation Patterns in the Deep Fault‐Controlled Geothermal System

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract Groundwater flow regulated by deep faults remains challenging to trace due to structural complexity. This study applies the noble gas tracer 222Rn combined with hydrochemistry and stable isotopes (δ2H, δ18O) to distinguish circulation patterns of geothermal springs along a major fault in the Tibetan Plateau.
Xiaoyan Shi, Xingxing Kuang, Meizhuang Zhu, Linfeng Fan, Xinkang Wang, Gexi Zheng, Yinlei Hao, Chunmiao Zheng   +7 more
wiley   +1 more source

Magnetic Signature of Oceanic Transform Faults and Their Fracture Zones

Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract Oceanic transform faults (TFs) offset mid‐ocean ridges, juxtaposing different‐aged crust and causing fracture zones (FZ) crossing ocean basins. Mounting evidence challenges the consensus that TFs are conservative plate boundaries, instead supporting the existence of extensional tectonics and two phases of magmatism.
Fei Zhou, Ingo Grevemeyer, Jérôme Dyment, Lars H. Ruepke, Christian Hübscher   +4 more
wiley   +1 more source

Active methylotrophic methanogenesis by a microbial consortium enriched from a terrestrial meteorite impact crater. [PDF]

mBio
van Dam F, Westmeijer G, Rezaei Somee M, Ketzer M, Kietäväinen R, Ono S, Bertilsson S, McIntosh JC, Dopson M, Drake H.   +9 more
europepmc   +1 more source

Terrestrial Runoff Divides the Central Arctic Ocean and Shapes the Biologically Relevant Marine Lightscape

Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract The Arctic Ocean is undergoing drastic changes in its sea ice cover, but is also optically complex. Observations from summer 2022 across the western Eurasian Basin, show increased colored dissolved organic matter (CDOM) absorption from terrestrial‐derived runoff within the Transpolar Drift (TPD) in the Amundsen Basin, extending down to a depth
Håkon Sandven, David McKee, Rafael Gonçalves‐Araujo, Rüdiger Röttgers, Anders F. Opdal, Philipp Assmy, Mats A. Granskog   +6 more
wiley   +1 more source

Stable Nitrogen Isotope Analysis of Amino Acids by Orbitrap Mass Spectrometry: Application for Extraterrestrial Samples. [PDF]

Rapid Commun Mass Spectrom
McIntosh OM, Baczynski AA, Matney M, McLain HL, Farnsworth KK, Dworkin JP, Glavin DP, Elsila JE, Xie H, Freeman KH.   +9 more
europepmc   +1 more source

Selection of Amino Acid Chirality via Neutrino Interactions with ¹⁴N in Crossed Electric and Magnetic Fields. [PDF]

Astrobiology, 2018
Famiano MA, Boyd RN, Kajino T, Onaka T.
europepmc   +1 more source