Results 91 to 100 of about 817,854 (220)

Simultaneous HF‐radar and DMSP observations of the cusp

Geophysical Research Letters, 1990
The Geospace Environment Modeling (GEM) Program is directed toward modeling the coupled solar wind/magnetosphere/ionosphere system. The inter‐calibration of ground‐based observations of the ionosphere and satellite observations has been identified as an essential step in tying together the data to produce a global picture of geospace.On October 10,1988
Baker, K.B., Greenwald, R.A., Ruohoniemi, J.M., Dudeney, J.R., Pinnock, M., Newell, P. T., Greenspan, M.E., Meng, C.-I.   +7 more
openaire   +2 more sources

Science Needs for a Terrestrial Biosphere Tipping Point Early Warning System

Reviews of Geophysics, Volume 64, Issue 4, December 2026.
Abstract Tipping points in the Earth system have the potential to cause major detrimental impacts to the biosphere and societies. Their inherent nonlinearity implies that even relatively small additional increases in external forcing might result in disproportionately large adjustments to components of the Earth system.
Jesse F. Abrams, Chris Huntingford, Sergei Petrovskii, Joshua E. Buxton, Helen Millman, Chris A. Boulton, Robert J. Parker, Cristina Ruiz Villena, Andrew M. Cunliffe, Joseph Clarke, Valerio Lucarini, Darren Ghent, Peter M. Cox, Timothy M. Lenton   +13 more
wiley   +1 more source

GRAIN: Mapping the World's Irrigation Canals and Why It Matters for Water, Food, and Climate

Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.
Abstract The engineered channels that carry water from large dams and rivers to agricultural fields, known as irrigation canals, are the link between source (lakes and reservoirs) and sink (farmlands). These canals make cultivation of crops possible across millions of hectares of land.
Sarath Suresh, Faisal Hossain, Vimal Mishra, Nehan Hossain   +3 more
wiley   +1 more source

Evaluating the Impact of Multiscale E‐Region Turbulence on HF Scintillation

Geophysical Research Letters, Volume 53, Issue 21, 16 November 2026.
Abstract Ionospheric scintillation driven by plasma irregularities disrupts radio propagation across frequencies from HF to L‐band. While phase‐screen methods dominate scintillation modeling, they can be inadequate in the E‐region where irregularity scales can be comparable to the radio wavelength or Fresnel scale and span orders of magnitude.
Alexander Q. Green, William J. Longley, Matthew A. Young, Meers M. Oppenheim   +3 more
wiley   +1 more source

Low training volume adaptive processing in HF skywave radar

, 2008
Adaptive processing in the HF radar environment suffers from the paucity of appropriate training data relative to the dimension of the required spatial filters.
Abramovich, Y., Yuri I. Abramovich, Johnson, B., Ben A. Johnson   +3 more
core   +1 more source

MXenes for Boosting Potassium Ion Storage: Structure‐Property Relationships, Interface Science, Microscopic Mechanisms, and Application Perspectives

Carbon Neutralization, Volume 5, Issue 6, November 2026.
MXene‐based potassium‐ion battery anodes are mapped by linking synthesis, surface chemistry, heterostructure design, and practical evaluation. Pristine MXenes and composites with carbon, oxides, sulfides, selenides, tellurides, and alloying phases are compared, while intercalation, pseudocapacitive, conversion/alloying, built‐in‐field, and trapping ...
Haohao Ding, Lingxia Fan, Lize Zhang, Xinghui Sun, Hongwei Bi, Aruuhan Bayaguud, Yelong Zhang   +6 more
wiley   +1 more source

Improving Coastal Circulation Using HF‐Radar Surface Currents

Earth and Space Science
In an attempt to improve the model‐derived coastal circulation around India, we explore three different frameworks to assimilate surface currents from HF‐Radars into an ocean model for the Indian Ocean.
Vinod Daiya, Balaji Baduru, Jagdish Prajapati, Biswamoy Paul, Arya Paul   +4 more
doaj   +1 more source

A bistatic HF radar for surface current mapping

IEICE Electronics Express, 2010
This paper proposes a bistatic High Frequency Surface Wave Radar (HFSWR) system for ocean current mapping. This system is composed of two remote sites. Both receive backscattered echoes as well as bistatic echoes transmitted by the other. An experiment was conducted on the coast of the North China Sea during January 2010, which proved effectiveness of ...
Jing Yang 0036, Biyang Wen, Chong Zhang, Xiaojing Huang 0001, Zhisheng Yan, Wei Shen   +5 more
openaire   +3 more sources

Air Stability of Sulfide Solid Electrolytes: From Theoretical Insights to Practical Solutions

ENERGY &ENVIRONMENTAL MATERIALS, Volume 9, Issue 6, November 2026.
This paper reviews research progress on the air stability of SSEs, covering their instability mechanisms and modification strategies, while outlining core challenges and future directions for practical applications. Sulfide solid electrolytes are pivotal for enabling high‐performance all‐solid‐state batteries due to their high ionic conductivity and ...
Hongbing Ding, Yue Hu, Xin Li, Yang Su, Xinlu Wang, Hongbo Zhang, Guixia Liu, Wensheng Yu, Xiangting Dong, Jinxian Wang, Xin Wang   +10 more
wiley   +1 more source

HF Radar Sea-echo from Shallow Water

Sensors, 2008
HF radar systems are widely and routinely used for the measurement of ocean surface currents and waves. Analysis methods presently in use are based on the assumption of infinite water depth, and may therefore be inadequate close to shore where the radar ...
Josh Kohut, Don Barrick, Bruce Nyden, Belinda Lipa   +3 more
doaj