Results 111 to 120 of about 8,939,787 (291)

THE ROLE OF STRATOSPHERE-TROPOSPHERE ANOMALIES IN THE OCCURRENCE OF WIDESPREAD EXTREME LOW TEMPERATURES IN IRAN’S COLD SEASON FROM THE PERSPECTIVE OF POTENTIAL VORTICITY [PDF]

Przegląd Geofizyczny
This study investigates the role of stratosphere-troposphere anomalies in the occurrence of widespread extreme low temperatures in Iran’s cold season using the potential vorticity index from 1960 to 2010.
Mina Mirian, Mostafa Karampour, Sohrab Ghaedi   +2 more
doaj   +1 more source

Hans Ertel, relativistic potential vorticity and geophysical applications

, 2006
Short review on the geophysical application of Ertel's potential vorticity ...
W Schröder, Treder, H-J, Schröder, W, H-J Treder   +3 more
core   +1 more source

Why does typhoon Noru (2022) possess severe rapid intensification as explored by the extended Sawyer–Eliassen equation?

Quarterly Journal of the Royal Meteorological Society, EarlyView.
As inferred from the Sawyer–Eliassen analyses, the intense diabatic heating located slightly inside the radius of maximum tangential wind (RMW) associated with a compact eyewall is mainly responsible for the severe RI of Noru, in contrast to typhoon Goni (2020) at a slower spinup despite similar RMW, due to the weaker diabatic heating. The severe RI of
Thi‐Chinh Nguyen, Ching‐Yuang Huang
wiley   +1 more source

Gyrofluid potential vorticity equation and turbulent equipartion states:Paper [PDF]

, 2015
An equation governing potential vorticity in a magnetized plasmas is derived. The equation is analogous to Ertel's theorem. In the long wave-length limit the potential vorticity equals the ratio of the gyro-frequency plus the E × B- and diamagnetic ...
Nielsen, Anders Henry, Rasmussen, J. Juul, Juul Rasmussen, Jens, Madsen, Jens, Treue, Frederik, Naulin, Volker   +5 more
core   +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

On the link between martian total ozone and potential vorticity [PDF]

, 2017
We demonstrate for the first time that total ozone in the martian atmosphere is highly correlated with the dynamical tracer, potential vorticity, under certain conditions.
Holmes, J. A., Lewis, Stephen R., Patel, Manish R., Patel MR, Holmes JA, Holmes, James A., Lewis SR, Patel, M. R., Lewis, S. R.   +8 more
core   +1 more source

A new scale‐selective measure of curvature for meteorological fields

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We introduce a novel diagnostic called curvature using radial variation (CURV) that quantifies the local cyclonic or anticyclonic curvature of mean‐sea‐level pressure or geopotential height gridded fields over selected scales. A depiction of how CURV values relate to differing cyclonic curvature is shown in the figure.
Nigel Roberts, Timothy Hewson, Anca Brookshaw, Matthieu Chevallier   +3 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

Coupled diabatic and frictional forcing of single‐layer vortical flow

Quarterly Journal of the Royal Meteorological Society, EarlyView.
A single‐layer balanced model is used to illustrate how diabatic and frictional forcing of a primary balanced vortical flow can be coupled self‐consistently, including the advection of potential vorticity by the induced transverse circulation. The coupling is illustrated in the context of a developing tropical cyclone, in which boundary‐layer dynamics ...
R. K. Scott
wiley   +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