Results 51 to 60 of about 246 (139)

A Global Assessment of Precipitable Water Vapor Derived From GNSS Zenith Tropospheric Delays With ERA5, NCEP FNL, and NCEP GFS Products

Earth and Space Science, 2021
In precipitable water vapor (PWV) retrievals from Global Navigation Satellite System (GNSS) data, the two essential parameters, namely, surface pressure (Ps) and weighted mean temperature (Tm), are often not available due to the lack of collocated ...
Biyan Chen, Wenkun Yu, Wei Wang, Zhetao Zhang, Wujiao Dai   +4 more
doaj   +1 more source

Processes Driving Drift‐Ice Evolution and Its Interaction With the Oceanic and Atmospheric Boundary Layers

Reviews of Geophysics, Volume 64, Issue 1, March 2026.
Abstract Sea ice is a crucial component of polar climate systems and is undergoing substantial changes in both hemispheres due to evolving climatic conditions. Arctic sea ice is transitioning from perennial to seasonal cover, and the Southern Ocean sea ice is exhibiting recent minima and enhanced seasonality.
Jari Haapala, Morven Muilwijk, Ioanna Merkouriadi, Pedro Duarte, Ilker Fer, Mats A. Granskog, Virginie Guemas, Tore Hattermann, Robinson Hordoir, Doroteaciro Iovino, Polona Itkin, Roberta Pirazzini, Felix Pithan, Igor Polyakov, Annette Rinke, Letizia Tedesco, Petteri Uotila, Martin Vancoppenolle, Marcello Vichi, Timo Vihma   +19 more
wiley   +1 more source

Assimilation of GNSS tomography products into the Weather Research and Forecasting model using radio occultation data assimilation operator [PDF]

Atmospheric Measurement Techniques, 2019
From Global Navigation Satellite Systems (GNSS) signals, accurate and high-frequency atmospheric parameters can be determined in all-weather conditions.
N. Hanna, E. Trzcina, G. Möller, G. Möller, W. Rohm, R. Weber   +5 more
doaj   +1 more source

PPP‐RTK Atmospheric Correction Generation and Service Applicability: A Case Study During Typhoon Saola and Moderate Geomagnetic Disturbances in Hong Kong

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Complex space weather, such as typhoons and solar activity, can cause heavy rainfall and ionospheric disturbances, affecting the quality of Global Navigation Satellite System (GNSS) signals. Among GNSS positioning techniques, Precise Point Positioning Real‐time Kinematic (PPP‐RTK) uses atmospheric corrections and bias products to achieve fast ...
Jiahuan Hu, Xuanyu Qu, Pan Li, Mengyu Ding, Jiadi Dai, Xiaoli Ding, Wu Chen   +6 more
wiley   +1 more source

Measurement report: Can zenith wet delay from GNSS “see” atmospheric turbulence? Insights from case studies across diverse climate zones [PDF]

Atmospheric Chemistry and Physics
Global navigation satellite system (GNSS) microwave signals are nearly unaffected by clouds but are delayed as they travel the troposphere. The hydrostatic delay accounts for approximately 90 % of the total delay and can be modelled well as a function of
G. Kermarrec, X. Calbet, Z. Deng, C. Carbajal Henken   +3 more
doaj   +1 more source

Tropospheric products of the second GOP European GNSS reprocessing (1996–2014) [PDF]

Atmospheric Measurement Techniques, 2017
In this paper, we present results of the second reprocessing of all data from 1996 to 2014 from all stations in International Association of Geodesy (IAG) Reference Frame Sub-Commission for Europe (EUREF) Permanent Network (EPN) as performed at the ...
J. Dousa, P. Vaclavovic, M. Elias
doaj   +1 more source

Exposing and Reducing Biases of Simulating Mixed‐Phase Clouds in the Convection‐Permitting E3SM Atmosphere Model: Lessons From an Arctic Cold‐Air Outbreak

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 3, 16 February 2026.
Abstract Mixed‐phase clouds modulate the water and energy cycles of high‐latitude regions, yet their liquid‐ice phase partitioning has long been poorly simulated in climate models. Here, simulations of Arctic mixed‐phase clouds by the Simple Cloud‐Resolving E3SM Atmosphere Model (SCREAM) are assessed against large‐eddy simulations, satellite data, and ...
Lin Lin, Yunyan Zhang, Hassan Beydoun, Xue Zheng, Meng Zhang, Peter Bogenschutz, Peng Wu, Peter M. Caldwell   +7 more
wiley   +1 more source

Capturing Extreme Water Vapor and Instability With High‐Resolution GNSS Monitoring

Atmospheric Science Letters, Volume 27, Issue 2, February 2026.
This study used data from a high‐resolution Global Navigation Satellite System network (< 10 km spacing), including private stations, to analyze water vapor structure during a heavy rainfall event in Japan. The network captured localized extreme precipitable water vapor (> 70 mm) and a moist absolutely unstable layer near the humid core.
Mikiko Fujita
wiley   +1 more source

A Novel Robust High‐Precision Ionospheric Delay Modeling for PPP‐RTK Using Crowdsourced Data

Space Weather, Volume 24, Issue 2, February 2026.
Abstract The performance of PPP‐RTK is critically dependent on the quality of ionospheric corrections derived from a reference network. While the proliferation of mass‐market Global Navigation Satellite System (GNSS) devices offers a promising crowdsourcing opportunity to densify or replace this infrastructure, it introduces the formidable challenge of
Bo Wang, Jiaxi Zhu, Zhilu Wu, Dejin Zhang, Zhao Li, Minsi Ao, Shengfeng Gu   +6 more
wiley   +1 more source

Mesoscale GPS Zenith Delay assimilation during a Mediterranean heavy precipitation event [PDF]

Advances in Geosciences, 2008
The impact of assimilating Zenith Total delay (ZTD) observations from a mesoscale ground-based GPS network over Western Europe is evaluated for the heavy precipitation event of 5–9 September 2005 over Southern France.
X. Yan, V. Ducrocq, P. Poli, G. Jaubert, A. Walpersdorf   +4 more
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