Results 71 to 80 of about 10,329 (228)

Stratosphere-Troposphere Coupling and Oceanic Feedbacks in an Aquaplanet Model

, 2021
Since the 90’s, there have been many studies looking at the impact of stratospheric temperature perturbations (STP’s) on the troposphere below, and the mechanisms involved. However, it is not well-understood how these interactions might be modified by atmosphere-ocean coupling. This holds particular relevance to the study of e.g.
openaire   +3 more sources

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

Vertical Moist Thermodynamic Structure and Spatial–Temporal Evolution of the MJO in AIRS Observations [PDF]

, 2006
The atmospheric moisture and temperature profiles from the Atmospheric Infrared Sounder (AIRS)/Advanced Microwave Sounding Unit on the NASA Aqua mission, in combination with the precipitation from the Tropical Rainfall Measuring Mission (TRMM), are ...
Fetzer, Eric J., Lambrigtsen, Bjorn H., Tian, Baijun, Waliser, Duane E., Wang, Bin, Yung, Yuk L.   +5 more
core   +1 more source

The benefits of a hybrid‐3DEnVar data assimilation scheme for the convection‐permitting NWP model AROME–Austria

Quarterly Journal of the Royal Meteorological Society, EarlyView.
The climatological‐error covariance matrix used in three‐dimensional variational data assimilation (3DVar) provides smooth and isotropic increments spread to long distances. In contrast, three‐dimensional ensemble variational data assimilation (3DEnVar) with a purely ensemble‐error covariance matrix provides inhomogeneous increments and contains the ...
Kaushambi Jyoti, Philipp Griewank, Florian Meier, Martin Weissmann   +3 more
wiley   +1 more source

Submonthly Polar Vortex Variability and Stratosphere–Troposphere Coupling in the Arctic

Journal of Climate, 2009
Abstract A principal component analysis is performed to characterize intraseasonal variability in the boreal stratospheric polar vortex. In contrast to previous studies, the current analysis examines daily zonal-mean variability within a limited spatial domain encompassing the stratospheric polar vortex.
Robert X. Black, Brent A. McDaniel
openaire   +2 more sources

Rare Lightning and Convection Characteristics During Two Successive Tornadoes in Southern China

High Voltage, EarlyView.
ABSTRACT Systematic investigations into lightning characteristics of tornado storms in China remain scarce. This study comprehensively analyses rare lightning behaviour and overshooting top characteristics for two successive tornadoes during a long‐lived supercell in southern China on 27 April 2024.
Fengquan Li, Jiangling Zhi, Yu Wang, Hantao Tao, Zhaoming Li, Shanqiang Gu, Zhe Li, Zeyu Zhang, Lei Zhang, Guoying Tang   +9 more
wiley   +1 more source

Observationally derived transport diagnostics for the lowermost stratosphere and their application to the GMI chemistry and transport model [PDF]

Atmospheric Chemistry and Physics, 2007
Transport from the surface to the lowermost stratosphere (LMS) can occur on timescales of a few months or less, making it possible for short-lived tropospheric pollutants to influence stratospheric composition and chemistry.
S. E. Strahan, B. N. Duncan, P. Hoor
doaj  

Diversity of Stratospheric Error Growth Across Subseasonal Prediction Systems

Geophysical Research Letters
The stratosphere has previously been shown to be a significant source of subseasonal tropospheric predictability. The ability of ensemble prediction systems to appropriately exploit this depends on their ability to reproduce the statistical properties of
R. W. Lee, A. J. Charlton‐Perez
doaj   +1 more source

A global non-hydrostatic model study of a downward coupling through the tropical tropopause layer during a stratospheric sudden warming [PDF]

Atmospheric Chemistry and Physics, 2015
The dynamical coupling process between the stratosphere and troposphere in the tropical tropopause layer (TTL) during a~stratospheric sudden warming (SSW) in boreal winter was investigated using simulation data from a global non-hydrostatic model (NICAM)
N. Eguchi, K. Kodera, T. Nasuno
doaj   +1 more source

The association between stratospheric weak polar vortex events and cold air outbreaks

, 2009
Previous studies have identified an association between near-surface temperature anomalies in the Northern Hemisphere and weak stratospheric polar westerlies.
Baldwin, Baldwin, Baldwin, Barnett, Bracegirdle, Bueh, Cai, Cellitti, Charlton, Charney, Chen, Chen, Cohen, Cordero, Garfinkel, Hurrell, Hurrell, Jeong, Kalnay, Kenyon, Kolstad, Konrad, Kuroda, Limpasuvan, Limpasuvan, Lorenz, Martius, Matsuno, Matsuno, McIntyre, Mercer, Mukougawa, Otterå, Pickart, Pinto, Polvani, Reichler, Renfrew, Scaife, Scaife, Skogseth, Song, Stephenson, Takaya, Thompson, Thompson, Thompson, Walsh   +47 more
core   +1 more source