Results 51 to 60 of about 12,209 (256)

Stratospheric and tropospheric seasonality and its implications for observation requirements in numerical weather prediction

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Daily time series of zonal‐mean zonal wind (m·s−1) at 10 hPa and 60° N from 1950 to 2021 from the ERA5 reanalysis. This shows huge variability in some seasons and very little in others. We provide evidence that high‐level observations, radiosonde and satellite, are more important during the extended winter season with its very large variability ...
Bruce Ingleby, Inna Polichtchouk
wiley   +1 more source

MieAI: a neural network for calculating optical properties of internally mixed aerosol in atmospheric models

npj Climate and Atmospheric Science
Aerosols influence weather and climate by interacting with radiation through absorption and scattering. These effects heavily rely on the optical properties of aerosols, which are mainly governed by attributes such as morphology, size distribution, and ...
Pankaj Kumar, Heike Vogel, Julia Bruckert, Lisa Janina Muth, Gholam Ali Hoshyaripour   +4 more
doaj   +1 more source

Investigation of the α-pinene photooxidation by OH in the atmospheric simulation chamber SAPHIR [PDF]

Atmospheric Chemistry and Physics, 2019
The photooxidation of the most abundant monoterpene, α-pinene, by the hydroxyl radical (OH) was investigated at atmospheric concentrations in the atmospheric simulation chamber SAPHIR.
M. Rolletter, M. Kaminski, M. Kaminski, I.-H. Acir, I.-H. Acir, B. Bohn, H.-P. Dorn, X. Li, X. Li, A. Lutz, S. Nehr, S. Nehr, F. Rohrer, R. Tillmann, R. Wegener, A. Hofzumahaus, A. Kiendler-Scharr, A. Wahner, H. Fuchs   +18 more
doaj   +1 more source

Tropospheric products as a signal of interest – overview of troposphere sensing techniques

, 2020
The microwave signals passing through the troposphere are delayed by refraction. Its high variations, both in time and space, are caused mainly by water vapor. The tropospheric delay used to be considered only as a source of error that needed to be removed. Nowadays, these delays are also a source of interest.
Wilgan, K., Rohm, W., Bosy, J., Geiger, A., Siddique, M., Wickert, J., Dick, G.   +6 more
openaire   +5 more sources

Diagnosing the 11‐year solar cycle's influence on the East Atlantic pattern

Quarterly Journal of the Royal Meteorological Society, EarlyView.
A previously unidentified solar‐cycle response in the East Atlantic pattern is found in late winter at lag +3 years with larger amplitude than the NAO response. A statistically significant NAO response to the solar cycle is seen in late winter at lag 0 years.
Stergios Misios, Paula L. M. Gonzalez, Lesley J. Gray, Scott Osprey, Hedi Ma   +4 more
wiley   +1 more source

A multimodel intercomparison study of variable‐resolution global models with grid refinement over the Arctic and Antarctic

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We document the protocol and first results from the first ever coordinated multimodel variable‐resolution experiment set with refinement over the polar regions. We find that the refinement generally yields model‐dependent effects. The most consistent improvement is an amelioration of the upper‐level cold bias in the polar regions that translates into ...
Lise Seland Graff, Dörthe Handorf, Raphael Köhler, Xavier Levine, René R. Wijngaard, Gareth J. Marshall, Alexey Yu. Karpechko, Ryan S. Williams, Priscilla A. Mooney   +8 more
wiley   +1 more source

Considerations on the dynamics of a cold spell over Greece

Meteorologische Zeitschrift, 1995
A cold spell was observed in March 1987 over Greece, which was characterised by extremely low temperatures and heavy snowfall. The dynamic and thermodynamic characteristics of this rather unusual event are investigated using ECMWF analyses.
Helena A. Flocas, Theodore S. Karacostas, Brian D. Giles, Apostolos A. Flocas   +3 more
doaj   +1 more source

Estimation of Atmospheric Path Delays in TerraSAR-X Data using Models vs. Measurements

Sensors, 2008
Spaceborne synthetic aperture radar (SAR) measurements of the Earth’s surface depend on electromagnetic waves that are subject to atmospheric path delays, in turn affecting geolocation accuracy.
Donat Perler, Michael Jehle, David Small, Adrian Schubert, Erich Meier   +4 more
doaj   +1 more source

Characterization of synoptic environment for mesoscale convective systems over South Korea using ERA5 reanalysis data

Quarterly Journal of the Royal Meteorological Society, EarlyView.
In this study, the synoptic conditions for modes of mesoscale convective systems (MCSs) in South Korea are generalized based on composite analysis. The preferred precipitation region, synoptic patterns, moisture transport, sea surface temperature and thermodynamic and dynamic instabilities are characterized according to four modes: convective cells (CC)
Jeong‐Eun Lee, GyuWon Lee
wiley   +1 more source

Use of wind profiler in severe weather monitoring

Meteorologische Zeitschrift, 1998
A 1299 MHz wind profiler was acquired to monitor low level winds near the Hong Kong International Airport. It was found that the equipment was also capable of yielding quality data to support the study of severe weather.
K. K. Yeung
doaj   +1 more source