Results 31 to 40 of about 72,276 (272)

El Niño Southern Oscillation influence on the Asian summer monsoon anticyclone [PDF]

open access: yesAtmospheric Chemistry and Physics, 2018
We analyse the influence of the El Niño Southern Oscillation (ENSO) on the atmospheric circulation and the mean ozone distribution in the tropical and subtropical UTLS region.
X. Yan   +9 more
doaj   +1 more source

Superposition of gravity waves with different propagation characteristics observed by airborne and space-borne infrared sounders [PDF]

open access: yesAtmospheric Chemistry and Physics, 2020
Many gravity wave analyses, based on either observations or model simulations, assume the presence of only a single dominant wave. This paper shows that there are much more complex cases with gravity waves from multiple sources crossing each others ...
I. Krisch   +9 more
doaj   +1 more source

Tropical Cyclones Reduce Ozone in the Tropopause Region Over the Western Pacific: An Analysis of 18 Years Ozonesonde Profiles

open access: yesEarth's Future, 2021
Typhoons play a key role in causing low ozone concentrations in the upper troposphere and lower stratosphere (UTLS) over the western Pacific. In this study, 18 years records (2000–2017) of balloon‐borne ozone measurements in Hong Kong (22.3°N, 114.2°E ...
Dan Li   +5 more
doaj   +1 more source

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

open access: yes, 2010
A comprehensive evaluation of seasonal backward trajectories initialized in the Northern Hemisphere lowermost stratosphere (LMS) has been performed to investigate the origin of air parcels and the main mechanisms determining characteristic structures in ...
Hegglin, Michaela I.   +2 more
core   +1 more source

Solar influences on dynamical coupling between the stratosphere and troposphere [PDF]

open access: yes, 2006
We use a simplified atmospheric general circulation model (AGCM) to investigate the response of the lower atmosphere to thermal perturbations in the lower stratosphere.
Blackburn, M., Haigh, J. D.
core   +1 more source

Observations of filamentary structures near the vortex edge in the Arctic winter lower stratosphere [PDF]

open access: yesAtmospheric Chemistry and Physics, 2013
The CRISTA-NF (Cryogenic Infrared Spectrometers and Telescope for the Atmosphere – New Frontiers) instrument is an airborne infrared limb sounder operated aboard the Russian research aircraft M55-Geophysica. The instrument successfully participated
C. Kalicinsky   +11 more
doaj   +1 more source

Orographically induced spontaneous imbalance within the jet causing a large-scale gravity wave event [PDF]

open access: yesAtmospheric Chemistry and Physics, 2021
To better understand the impact of gravity waves (GWs) on the middle atmosphere in the current and future climate, it is essential to understand their excitation mechanisms and to quantify their basic properties.
M. Geldenhuys   +9 more
doaj   +1 more source

Fast transport from Southeast Asia boundary layer sources to northern Europe: rapid uplift in typhoons and eastward eddy shedding of the Asian monsoon anticyclone [PDF]

open access: yesAtmospheric Chemistry and Physics, 2014
Enhanced tropospheric trace gases such as CO, CH4 and H2O and reduced stratospheric O3 were measured in situ in the lowermost stratosphere over northern Europe on 26 September 2012 during the TACTS aircraft campaign.
B. Vogel   +8 more
doaj   +1 more source

How can Brewer–Dobson circulation trends be estimated from changes in stratospheric water vapour and methane? [PDF]

open access: yesAtmospheric Chemistry and Physics, 2022
The stratospheric meridional overturning circulation, also referred to as the Brewer–Dobson circulation (BDC), controls the composition of the stratosphere, which, in turn, affects radiation and climate. As the BDC cannot be directly measured, one has to
L. Poshyvailo-Strube   +11 more
doaj   +1 more source

Retrieving the age of air spectrum from tracers: principle and method [PDF]

open access: yesAtmospheric Chemistry and Physics, 2019
Surface-emitted tracers with different dependencies on transit time (e.g., due to chemical loss or time-dependent boundary conditions) carry independent pieces of information on the age of air spectrum (the distribution of transit times from the surface).
A. Podglajen, F. Ploeger
doaj   +1 more source

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