Results 51 to 60 of about 1,619 (201)

Windows of opportunity in subseasonal weather regime forecasting: A statistical–dynamical approach

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study explores how the atmospheric state at initialisation creates windows of opportunity for improving week 3 forecasts of weather regime activity. Greenland blocking activity increases following Madden–Julian Oscillation phases 7, 8, and 1 and weak stratospheric polar vortex states, revealing patterns exploitable by statistical models.
Fabian Mockert, Christian M. Grams, Sebastian Lerch, Julian Quinting   +3 more
wiley   +1 more source

Using a causal effect network approach to quantify the impact of ENSO teleconnections on summer monsoon precipitation over the Himalayas and key regional circulations

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We quantified the causal effect (CE) of linkages between four monthly climate indices ENSO, SMHP, RWC, and MHC for 1940–2022 with a time lag of one month. The results show CE values from (1) ENSO to SMHP of −0.33$$ -0.33 $$ to −0.44$$ -0.44 $$ (i.e., a one standard deviation (SD) increase in ENSO causes a decrease in SMHP of −0.33$$ -0.33 $$ to −0.44$$
Grzegorz Muszynski, Andrew Orr, Indrani Roy, Giorgia Di Capua, Hamish D. Pritchard, J. Scott Hosking   +5 more
wiley   +1 more source

Global Assessment of the GNSS Single Point Positioning Biases Produced by the Residual Tropospheric Delay

Remote Sensing, 2021
The tropospheric delay is one of the main error sources that degrades the accuracy of Global Navigation Satellite Systems (GNSS) Single Point Positioning (SPP).
Ling Yang, Jinfang Wang, Haojun Li, Timo Balz   +3 more
doaj   +1 more source

Inter-technique validation of tropospheric slant total delays [PDF]

Atmospheric Measurement Techniques, 2017
Abstract. An extensive validation of line-of-sight tropospheric Slant Total Delays (STD) from Global Navigation Satellite Systems (GNSS), ray-tracing in Numerical Weather Prediction Models (NWM) fields and microwave Water Vapour Radiometer (WVR) is presented.
Michal Kačmařík, Jan Douša, Galina Dick, Florian Zus, Hugues Brenot, Gregor Möller, Eric Pottiaux, Jan Kapłon, Paweł Hordyniec, Pavel Václavovic, Laurent Morel   +10 more
openaire   +7 more sources

Transformer-Based Global Zenith Tropospheric Delay Forecasting Model

Remote Sensing, 2022
Zenith tropospheric delay (ZTD) plays an important role in high-precision global navigation satellite system (GNSS) positioning and meteorology. At present, commonly used ZTD forecasting models comprise empirical, meteorological parameter, and neural network models.
Huan Zhang, Yibin Yao, Chaoqian Xu, Wei Xu, Junbo Shi   +4 more
openaire   +2 more sources

Assessing high‐resolution numerical models and bottom‐boundary factors for a Mediterranean heavy precipitation event

Quarterly Journal of the Royal Meteorological Society, EarlyView.
State‐of‐the‐art, convection‐permitting NWP models reproduced the main features of the October 22–23, 2019 heavy precipitation event in Catalonia. However, slight configuration changes yielded varying streamflow responses and statistical performance, highlighting the challenge of simulating these events in Mediterranean medium‐sized basins ...
D. Ramonell, D. S. Carrió, A. Amengual, R. Romero   +3 more
wiley   +1 more source

Real-Time Tropospheric Delay Retrieval from Multi-GNSS PPP Ambiguity Resolution: Validation with Final Troposphere Products and a Numerical Weather Model

Remote Sensing, 2018
The multiple global navigation satellite systems (multi-GNSS) bring great opportunity for the real-time retrieval of high-quality zenith tropospheric delay (ZTD), which is a critical quality for atmospheric science and geodetic applications.
Cuixian Lu, Xin Li, Junlong Cheng, Galina Dick, Maorong Ge, Jens Wickert, Harald Schuh   +6 more
doaj   +1 more source

North Pacific Model Biases Influence Kuroshio Extension Atmospheric Circulation Patterns

Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract The Kuroshio Extension (KE) system significantly impacts decadal North Pacific climate variability by modulating downstream atmospheric circulation patterns. Using satellite‐derived and reanalysis products, and simulations from the High Resolution Model Intercomparison Project within the Coupled Model Intercomparison Project Phase 6, we ...
Se‐Yong Song, Samantha Stevenson, Emanuele Di Lorenzo, Matthew Newman, Antonietta Capotondi, Niklas Schneider   +5 more
wiley   +1 more source

A zenith tropospheric delay correction model based on the regional CORS network

Geodesy and Geodynamics, 2012
Tropospheric delay is a primary error source in earth observations and a variety of radio navigation technologies. In this paper, the relationship between zenith tropospheric delays and the elevation and longitude of stations is analyzed using the zenith
Huang Liangke, Liu Lilong, Yao Chaolong
doaj   +1 more source

Estimating Zenith Tropospheric Delay Based on GPT2w Model [PDF]

IEEE Access, 2019
To precisely and conveniently estimate zenith tropospheric delay (ZTD), troposphere refractivity is deduced through global pressure and temperature 2w (GPT2w) model and surface meteorology devices, ZTD is estimated based on integration of refractivity in the zenith direction. When surface meteorological measurements are absent, all parameters including
Zan Liu, Xihong Chen, Qiang Liu
openaire   +2 more sources