Results 91 to 100 of about 34,894 (282)

The propagation of mountain waves into the stratosphere: Quantitative evaluation of three-dimensional simulations [PDF]

, 2000
On 6 January 1992 measurements of a mountain wave with significant amplitude were taken over the southern tip of Greenland during an ER-2 flight at an altitude of about 20 km.
Leutbecher, Martin, Volkert, Hans
core  

Multiscale numerical sensitivity simulations of a mesoscale gravity‐wave event

Quarterly Journal of the Royal Meteorological Society, EarlyView.
High‐resolution WRF simulations of the February 14–15, 1992 STORM‐FEST event show that mesoscale gravity‐wave genesis occurs via geostrophic adjustment within an upper‐level unbalanced jet, while wave ducting governs maintenance. High‐resolution (1 km), improved physical parameterization, and targeted sensitivity simulations demonstrate that upstream ...
Rajan Bhandari, Michael L. Kaplan, Ananya Sen   +2 more
wiley   +1 more source

The impact of dehydration and extremely low HCl values in the Antarctic stratospheric vortex in mid-winter on ozone loss in spring [PDF]

Atmospheric Chemistry and Physics
Simulations of Antarctic chlorine and ozone chemistry in previous work show that in the core of the Antarctic vortex (16–18 km, 85–55 hPa, 390–430 K) HCl null cycles (initiated by reactions of Cl with CH4 and CH2O) are effective.
Y. Zhang-Liu, R. Müller, R. Müller, J.-U. Grooß, J.-U. Grooß, S. Robrecht, S. Robrecht, B. Vogel, B. Vogel, A. M. Zafar, A. M. Zafar, R. Lehmann   +11 more
doaj   +1 more source

Evaluation and assimilation of Arctic Weather Satellite data in the AROME‐Arctic forecast system

Quarterly Journal of the Royal Meteorological Society, EarlyView.
The Arctic Weather Satellite (AWS), launched in August 2024, is a prototype for the future EPS–Sterna constellation of small satellites carrying an innovative microwave sounder. We present the first assessment of AWS in the regional AROME‐Arctic numerical weather prediction system, covering post‐launch calibration results and the impact of AWS ...
Stéphanie Guedj, Per Dahlgren, Máté Mile   +2 more
wiley   +1 more source

Stratospheric influence on tropical cyclone evolution

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We developed a metric based on moist static energy to detect and quantify the intrusion of stratospheric air into the inner core of tropical cyclones. High‐resolution numerical simulations show that this stratospheric interaction forms warm anomalies (high‐level warm cores) in the upper troposphere.
Andrea Davin, Giousef Alexandros Charinti, Caroline Muller, Andrea Polesello, Claudia Pasquero   +4 more
wiley   +1 more source

Attribution of subseasonal cold‐spell forecasts to remote drivers using nudging experiments

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Nudging experiments with the European Centre for Medium‐Range Weather Forecasts (ECMWF) model show that Northern European cold spells can arise from different drivers. Some events are predominantly influenced by stratospheric dynamics, while others also involve important tropospheric processes.
Irene Erner, Alexey Karpechko, Inna Polichtchouk, Frédéric Vitart   +3 more
wiley   +1 more source

Quantification of inmixing of Asian Monsoon air by multi-species classification in a match flight experiment [PDF]

Atmospheric Chemistry and Physics
Mixing of air between compartments of the atmosphere is fundamental to atmospheric composition. Such mixing is commonly studied using tracer-tracer correlations.
J. Kaumanns, J. Ungermann, B. Vogel, S. Johansson, E. Kretschmer, F. Plöger, P. Preuße, W. Woiwode, M. Riese   +8 more
doaj   +1 more source

Synoptic and large‐scale drivers of extreme precipitation events in the Himalayas

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Months associated with maximum frequency of extreme precipitation events (EPEs). 6102 extreme precipitation days (i.e., exceeding 99th percentile for daily precipitation) occurred across the Karakoram, Western Himalayas (WH), Central Himalayas (CH) and Eastern Himalayas (EH) during 1979 to 2023.
Priya Bharati, Pranab Deb, Kieran M. R. Hunt   +2 more
wiley   +1 more source

Transport timescales and tracer properties in the extratropical UTLS [PDF]

, 2010
A comprehensive evaluation of seasonal backward trajectories initialized in the northern hemisphere lowermost stratosphere (LMS) has been performed to investigate the factors that determine the temporal and spatial structure of troposphere-to ...
Hegglin, M. I., Hegglin, Michaela I., Hoor, Peter, Hoor, P., Wernli, H., Bönisch, Harald, H. Bönisch, Bönisch, H., H. Wernli, P. Hoor, M. I. Hegglin, Wernli, Heini; id_orcid, Wernli, Heini   +12 more
core   +2 more sources

Decadal‐scale drivers of South Pacific hydroclimate variability

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Using prescribed SST perturbations in the IGCM4 model, we investigate the mechanisms by which three major modes of low‐frequency climate variability—the IPO, AMV, and Southern Ocean SST‐driven midlatitude jet shifts—modulate the South Pacific hydroclimate.
Daniel T. Skinner, Connor Robbins, Gordon N. Inglis, Manoj Joshi, Peter Langdon, Adrian J. Matthews, Mark Peaple, Timothy J. Osborn, David A. Sear   +8 more
wiley   +1 more source