Results 41 to 50 of about 1,619 (201)

Troposphere Delay Remote Sensing Using Single GPS Receiver

Journal of Engineering Research, 2022
The most prominent spatially correlated errors in GNSS observations are well known to be atmospheric effects. The ionosphere and troposphere are the two main layers of the Atmosphere that cause delays in GNSS observations. A linear combination of the dual-frequency data can be used to reduce ionospheric delay.
Ahmed Sedeek, Mohamed Doma, Mostafa Rabah, Ahmed Elsayed   +3 more
openaire   +1 more source

Evaluation of CMIP6 Models in Simulating Australian Monsoon Over Northern Australia

International Journal of Climatology, EarlyView.
The study assesses CMIP6 models for their ability to simulate key aspects of the Australian summer monsoon, including precipitation patterns, wind circulation, monsoon onset/retreat, and ENSO teleconnections. Most models overestimate rainfall, underestimate wind strength, and simulate more uniform ENSO influence across northeast and northwest Australia.
Rida S. Kiani, Josephine R. Brown, Andrew D. King, Claire Vincent, Nicola Maher   +4 more
wiley   +1 more source

Seasonal Variability of Precipitating Systems in Four Radar Domains of Northeast Brazil

International Journal of Climatology, EarlyView.
This study analyzes the climatology and evaluates how the physical aspects of precipitating systems are influenced by the dry and wet seasons in Northeast Brazil, highlighting seasonal variations in the frequency, size, intensity, and duration of these systems in the regions of Natal, Maceió, Petrolina, and Salvador.
Amanda Carolina da Silva Queiroz, Thiago Souza Biscaro   +1 more
wiley   +1 more source

A Tropospheric Zenith Delay Forecasting Model Based on a Long Short-Term Memory Neural Network and Its Impact on Precise Point Positioning

Remote Sensing, 2022
Global navigation satellite system (GNSS) signals are affected by refraction when traveling through the troposphere, which result in tropospheric delay. Generally, the tropospheric delay is estimated as an unknown parameter in GNSS data processing.
Huan Zhang, Yibin Yao, Mingxian Hu, Chaoqian Xu, Xiaoning Su, Defu Che, Wenjie Peng   +6 more
doaj   +1 more source

Dry–Hot Compound Events Driving the 2024 Pantanal Wildfires

International Journal of Climatology, EarlyView.
Extreme wildfires in the Pantanal in 2024 were driven by a cascade of heatwaves, rainfall deficits and the absence of the annual flood pulse. These conditions dried soils and rivers, enhanced fuel accumulation and enabled early and intense fire outbreaks.
Liz B. C. Belém, Ronaldo Albuquerque, Leonardo F. Peres, Filippe L. M. Santos, Julia A. Rodrigues, Lucas S. Menezes, Patrícia S. Silva, Ricardo M. Trigo, Carlos C. DaCamara, Ana Russo, João Geirinhas, Geraldo A. Damasceno Junior, Fabio O. Roque, Ana M. B. Nunes, Renata Libonati   +14 more
wiley   +1 more source

An ERA5 tropospheric parameters-augmented approach for improving GNSS precise point positioning

Geodesy and Geodynamics, 2023
Precise Point Positioning (PPP) technology has developed into a potent instrument for geodetic positioning, ionospheric modeling, tropospheric atmospheric parameter detection, and seismic monitoring.
Liangke Huang, Feifan Liu, Lijie Guo, Guiwen Lan, Lv Zhou, Cheng Wang, Lilong Liu   +6 more
doaj   +1 more source

Meteorological conditions leading to a catastrophic, rain‐induced landslide in Cameroon in October 2019

Quarterly Journal of the Royal Meteorological Society, EarlyView.
October 2019 was characterized by three main multiday wet spells in Bafoussam and Dschang. Our results indicated that wet spells were influenced by a vortex pair near the Gulf of Guinea, a strong Sahara Heat Low located anomalously far east and north, a northward shift of the intertropical discontinuity, an enhancement of the inland penetration of the ...
Derbetini A. Vondou, Marlon Maranan, Andreas H. Fink, Peter Knippertz   +3 more
wiley   +1 more source

Tropospheric Delay Correction Based on a Three-Dimensional Joint Model for InSAR

Remote Sensing, 2019
Tropospheric delays in spaceborne Interferometric Synthetic Aperture Radar (InSAR) can contaminate the measurement of small amplitude earth surface deformation.
Huaping Xu, Yao Luo, Bo Yang, Zhaohong Li, Wei Liu   +4 more
doaj   +1 more source

Dynamics and model representation of two contrasting extreme precipitation events in the Sahel

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Hovmöller diagrams of the two investigated extreme precipitation events in Mali are shown for (i) IMERG observations, and ICOsahedral Nonhydrostatic model (ICON) runs with parameterization of explicit convection (ii) enabled and (iii) disabled. This work highlights that the commonly perceived benefit of using explicit convection in a state‐of‐the‐art ...
Souleymane Sanogo, Marlon Maranan, Andreas H. Fink, Beth J. Woodhams, Peter Knippertz   +4 more
wiley   +1 more source

A comprehensive comparison of atmospheric mapping functions for GPS measurements in Egypt

Journal of Geodetic Science, 2012
The principal limiting error source in the Global Positioning System (GPS) is the mismodeling of the delay experienced by radio waves in propagating through the atmosphere.
Younes S. A., Elmezayen A. G.
doaj   +1 more source