Results 31 to 40 of about 10,278 (196)

Effects of atmospheric sphericity on stratospheric chemistry and dynamics over Antarctica [PDF]

open access: yes, 2005
Atmospheric sphericity is an important factor that must be considered in order to evaluate an accurate ozone loss rate in the polar stratosphere. The built-in plane-parallel radiative transfer scheme of a nudging chemical transport model (CTM) and an ...
Akiyoshi   +43 more
core   +2 more sources

Climate model simulation of winter warming and summer cooling following the 1991 Mount Pinatubo volcanic eruption

open access: yes, 1999
We simulate climate change for the 2-year period following the eruption of Mount Pinatubo in the Philippines on June 15, 1991, with the ECHAM4 general circulation model (GCM).
Antuna, J.   +4 more
core   +1 more source

The impact of different CO2 and ODS levels on the mean state and variability of the springtime Arctic stratosphere

open access: yesEnvironmental Research Letters, 2023
Rising greenhouse gases (GHG) and decreasing anthropogenic ozone-depleting substances (ODS) are the main drivers of the stratospheric climate evolution in the 21st century.
Jessica Kult-Herdin   +4 more
doaj   +1 more source

Solar Impact on Climate: Modeling the Coupling Between the Middle and the Lower Atmosphere [PDF]

open access: yes, 2005
Solar variability influences the earth's atmosphere on different time scales. In particular, the impact of the 11-year solar cycle is of interest as it provides the major contribution to natural climate variability.
Langematz, Ulrike, Matthes, Katja
core  

On the abundance of non-cometary HCN on Jupiter

open access: yes, 2010
Using one-dimensional thermochemical/photochemical kinetics and transport models, we examine the chemistry of nitrogen-bearing species in the Jovian troposphere in an attempt to explain the low observational upper limit for HCN.
Achterberg   +169 more
core   +1 more source

Impact of small‐scale gravity waves on tracer transport

open access: yesQuarterly Journal of the Royal Meteorological Society, EarlyView.
We extend a gravity wave (GW) parametrization to calculate the tracer transport due to the GW–Stokes drift and next‐order effects, where the approach is validated by comparing coarse‐resolution simulations with parametrized GWs to high‐resolution, wave‐resolving reference simulations.
Irmgard Knop   +2 more
wiley   +1 more source

Diagnostics of the tropical tropopause layer from in-situ observations and CCM data [PDF]

open access: yes, 2009
A suite of diagnostics is applied to in-situ aircraft measurements and one Chemistry-Climate Model (CCM) data to characterize the vertical structure of the Tropical Tropopause Layer (TTL).
Cagnazzo, Chiara   +9 more
core   +5 more sources

The 1986–1989 ENSO cycle in a chemical climate model [PDF]

open access: yesAtmospheric Chemistry and Physics, 2006
A pronounced ENSO cycle occurred from 1986 to 1989, accompanied by distinct dynamical and chemical anomalies in the global troposphere and stratosphere.
S. Brönnimann   +7 more
doaj  

Tropopause-level planetary wave source and its role in two-way troposphere–stratosphere coupling [PDF]

open access: yesWeather and Climate Dynamics, 2020
Atmospheric planetary waves play a fundamental role in driving stratospheric dynamics, including sudden stratospheric warming (SSW) events. It is well established that the bulk of the planetary wave activity originates near the surface.
L. Boljka, T. Birner
doaj   +1 more source

Assessing the impact of model biases on subseasonal forecast skill

open access: yesQuarterly Journal of the Royal Meteorological Society, EarlyView.
Relaxation experiments where the nudging was performed towards bias‐corrected integrations of the same model display significantly improved skill at weeks 3 and 4, particularly in the northern extratropics. This indicates that there is a large potential for improving dynamical subseasonal forecasting skill by improved treatment of model biases.
Frédéric Vitart, Magdalena Balmaseda
wiley   +1 more source

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