Results 61 to 70 of about 36,964 (261)
Quarterly Journal of the Royal Meteorological Society, EarlyView.The ENSO–East Asia teleconnection exhibits strong subseasonal variability, driven by ENSO‐related tropical convection anomalies over the Indian Ocean, Maritime Continent, and central Pacific. GloSea6 fails to accurately predict this teleconnection due to errors in simulating the convection anomalies‐induced teleconnection patterns.
Chang‐Hyun Park, Seok‐Woo Son
wiley +1 more source
Evaluating seasonal forecast improvements over the past two decades
Quarterly Journal of the Royal Meteorological Society, EarlyView.We have analysed the performance of operational seasonal forecasting models since their inception. Clear improvements are measured through the different model eras, particularly in the Tropics. For the extratropics, the strongest improvements are evident during the boreal winter season over the North Pacific/North America, linked to improvements in the
Christopher H. O'Reilly +4 more
wiley +1 more source
Moist convection and radiative cooling: Dynamical response and scaling
Quarterly Journal of the Royal Meteorological Society, EarlyView.The mechanism that sets the updraught velocities in deep convective clouds is studied here using cloud‐resolving model simulations in radiative–convective equilibrium. We show that, for simulations with vastly different rates of radiative cooling and surface temperatures, the buoyancy in clouds remains remarkably constant (histogram shown here).
Lokahith Agasthya, Caroline Muller
wiley +1 more source
, 2010 The intense cyclonic vortices that form over the winter pole are one of the most prominent features of the stratospheric circulation. The structure and dynamics of these “polar vortices” play a dominant role in the winter and spring stratospheric circulation and are key to determining distribution of trace gases, in particular ozone, and the couplings ...
Waugh, Darryn W., Polvani, Lorenzo M.
openaire +2 more sources
The stratospheric gravity wave field produced by a supercell
Quarterly Journal of the Royal Meteorological Society, EarlyView.Supercells are a class of long‐lasting thunderstorms with rotating updrafts that often cause severe weather, hail, and tornadoes. This study uses numerical simulations to characterize the stratospheric gravity waves that are caused by these storms.
David S. Nolan, Yi Dai
wiley +1 more source
Chlorine peroxide reaction explains observed wintertime hydrogen chloride in the Antarctic vortex
Communications Earth & EnvironmentIt is well established that the drastic ozone loss in the Antarctic stratosphere, commonly known as the ozone hole, is primarily driven by gas-phase and heterogeneous chemical processes. While chemistry transport models generally reproduce observed ozone
Jens-Uwe Grooß +3 more
doaj +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 PhysicsSimulations 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 +11 more
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When tiny convective spread affects a midlatitude jet: Spread sequence
Quarterly Journal of the Royal Meteorological Society, EarlyView.We investigate spread evolution by mesoscale convection from tiny initial condition uncertainty during a real event. There is significant variation among the systems in their propensity to interact with the jet stream, whereby variability in one system (due to convective and long‐wave radiative heating tendencies) tightly relates to Rossby‐like ...
Edward Groot, Michael Riemer
wiley +1 more source
A dynamics-based separation of deep and shallow stratospheric circulation branches [PDF]
Atmospheric Chemistry and PhysicsThe wave-driven Brewer–Dobson circulation plays a crucial role in determining the transport of trace gases and aerosols in the stratosphere. We examine the structure of the circulation based on reanalysis data (ERA5, ERA-Interim, MERRA2, and JRA55) and ...
R. Baikhadzhaev +6 more
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Mesoscale dynamics of cyclone Leslie (2018): A diagnostic analysis of a rare Iberian landfall
Quarterly Journal of the Royal Meteorological Society, EarlyView.This study presents a successful numerical simulation of cyclone Leslie (2018), using WRF‐ARW v4.5.1. Several mesoscale dynamics were identified indicative of the occurrence of sting jet and cold conveyor belt, which potentiated the record‐breaking winds in central Portugal.
Miguel M. Lima +5 more
wiley +1 more source