Results 91 to 100 of about 54,423 (197)

Fluvial deposits of the Ahr river (western Germany) reveal recurring high‐magnitude flood events over the last 1,500 years

open access: yesEarth Surface Processes and Landforms, Volume 51, Issue 1, January 2026.
Floods are one of the most critical environmental threats in Central Europe. We show the importance of geomorphological records from Ahr flood deposits for reconstructing past high‐magnitude flood events. Our chemolithostratigraphical analysis shows that centennial to millennial scale high‐energy flooding is not the exception but the rule in the Ahr ...
Christoph Zielhofer   +9 more
wiley   +1 more source

Double layers in the downward current region of the aurora [PDF]

open access: yesNonlinear Processes in Geophysics, 2003
Direct observations of magnetic-field-aligned (parallel) electric fields in the downward current region of the aurora provide decisive evidence of naturally occurring double layers.
R. E. Ergun   +5 more
doaj  

Cosmology and Science Education: Problems and Promises

open access: yes, 2012
Cosmology differs in some respects significantly from other sciences, primarily because of its intimate association with issues of a conceptual and philosophical nature.
Kragh, Helge
core  

Gamma Hadron Separation using Pairwise Compactness Method with HAWC

open access: yes, 2015
The High-Altitude Water Cherenkov (HAWC) Observatory is a ground based air-shower array deployed on the slopes of Volcan Sierra Negra in the state of Puebla, Mexico.
Hampel-Arias, Zigfried   +1 more
core   +1 more source

Deriving Gridded Soil Moisture Estimates Using Earth Observation Data and a Process Informed Statistical Machine Learning Approach

open access: yesMeteorological Applications, Volume 33, Issue 1, January/February 2026.
A process‐informed machine learning approach, which included dynamic and static earth observation data and trained on in situ data from the United Kingdom, was capable of reproducing measured in situ values from locations not included in the model training. The model was then employed to derive daily, gridded estimates of soil moisture for Ireland. The
Rowan Fealy   +4 more
wiley   +1 more source

Holocene Glacial–Paraglacial–Periglacial Transitions of a Sub‐Arctic Glacial Cirque, Fremri‐Grasárdalur, Northern Iceland

open access: yesPermafrost and Periglacial Processes, Volume 37, Issue 1, Page 78-106, January/March 2026.
ABSTRACT The aim of this work is to study a variety of glacial, periglacial and paraglacial features found in a small cirque, Fremri‐Grasárdalur, in Tröllaskagi (Northern Iceland). We implement a multidisciplinary approach combining high‐resolution geomorphological mapping, horizontal/vertical boulder displacement (from 1994 to 2019) and surface ...
Javier Santos‐González   +13 more
wiley   +1 more source

Simulation of Near Horizontal Muons and Muon Bundles for the HAWC Observatory with CORSIKA

open access: yes, 2017
The HAWC (High Altitude Water Cerenkov) gamma ray observatory observes muons with nearly-horizontal trajectories corresponding to zenith angles greater than $80^{0}$. HAWC is located at an altitude of 4100 meters a.s.l. (70 deg. atmospheric depth of 2400
Barber, Ahron S.   +2 more
core   +1 more source

Uncertainty Propagation From Radio Occultation Profiles to Aggregated Atmospheric Gridded Fields

open access: yesEarth and Space Science, Volume 13, Issue 1, January 2026.
Abstract Radio occultation is a well‐established remote sensing method that provides reliable estimates of atmospheric profiles of diverse variables, including temperature and pressure. However, as with all indirect methods, radio occultation has some inherent systematic and random error effects, which lead to observational uncertainties.
S. Scher   +4 more
wiley   +1 more source

Superdiffusion of Cosmic Rays: Implications for Cosmic Ray Acceleration

open access: yes, 2016
Diffusion of cosmic rays (CRs) is the key process of understanding their propagation and acceleration. We employ the description of spatial separation of magnetic field lines in MHD turbulence in Lazarian & Vishniac (1999) to quantify the divergence of ...
Lazarian, A., Yan, Huirong
core   +2 more sources

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