نتایج جستجو برای: troposphere interaction
تعداد نتایج: 570676 فیلتر نتایج به سال:
Unexpectedly high concentrations of ultrafine particles were observed over a wide range of latitudes in the upper troposphere and lower stratosphere. Particle number concentrations and size distributions simulated by a numerical model of ion-induced nucleation, constrained by measured thermodynamic data and observed atmospheric key species, were consistent with the observations. These findings ...
Ozonolysis is a major removal mechanism in the troposphere for unsaturated hydrocarbons which are emitted in large quantities from both natural and human sources. Now it is generally accepted that ozonolysis of alkenes proceeds via Criegee intermediates, highly reactive species postulated in 1949 by Rudolf Criegee. In the troposphere, Criegee intermediates are involved in several important atmo...
Saturn's poles exhibit an unexpected symmetry in hot, cyclonic polar vortices, despite huge seasonal differences in solar flux. The cores of both vortices are depleted in phosphine gas, probably resulting from subsidence of air into the troposphere. The warm cores are present throughout the upper troposphere and stratosphere at both poles. The thermal structure associated with the marked hexago...
This theoretical study is carried out to investigate the effect of radiation on ice crystal spectrum in the upper troposphere. First, an explicit expression is obtained for the ice crystal growth rate that takes account of radiative and kinetic effects. Second, the expression is used to quantitatively analyse how radiation broadens the ice crystal spectrum and then to reveal a new precipitation...
The sea ice concentration (SIC) over the Weddell Sea displays obvious intraseasonal variability during austral autumn with a dominant frequency of 5–20 days. SIC is manifested as development anomalies from northeastern Antarctic Peninsula toward central Sea. Rossby wave train associated internal atmospheric featuring circumglobal zonal wavenumber 4 pattern induces anomalous surface winds and dr...
A comprehensive analysis of the temporal evolution tropospheric ozone in Antarctica using more than 25 years surface and ozonesonde measurements reveals significant changes there. It shows a positive trend at lower mid-troposphere, but negative upper troposphere. We also find links between different climate modes observe that residual overturning circulation, strength polar vortex, stratosphere...
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