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RISHydrogen Escape in the Terrestrial Atmosphere at Low Oxygen Levels: A Photochemical Model
Publisher: American Meteorological Society
Abstract: It has already been shown that a decrease of the oxygen level in the atmosphere of the earth would lower significantly the temperature of the exosphere, thus limiting the escape of hydrogen. The reduction of the escape ...
Radiative Damping and Amplitude of Long-Wavelength Modes in the Stratosphere
Publisher: American Meteorological Society
Abstract: The dependence of radiative damping rates in the stratosphere is investigated as a function of the distribution of active radiative gases and the wavelength of the temperature perturbation. Damping rates are found to depend ...
A Simple Method to Account for Rayleigh Scattering Effects on Photodissociation Rates
Publisher: American Meteorological Society
Abstract: A simple scheme is proposed to account for the Rayleigh scattering effects on photodissociation rates. The method is based on combining the reflectivity and transmission effects of two layers?one above and one below the ...
Tropical SST Preconditioning of the SH Polar Vortex during Winter 2002
Publisher: American Meteorological Society
Abstract: The response of the Southern Hemisphere (SH) polar atmosphere to the tropical sea surface temperature (SST) during the 2002 winter?spring season is investigated by using a general circulation model (GCM). The SH stratospheric ...
A Comparison of Lidar Data and Two-Dimensional Simulation of Dust Transport from the Eruption of El Chichón
Publisher: American Meteorological Society
Abstract: A two-dimensional model has been integrated for two years to study the evolution of the El Chichón aerosol cloud in the stratosphere, starting about three months after the eruption. Initial conditions for the backscattering ...
Arctic Sea Ice Reduction and Extreme Climate Events over the Mediterranean Region
Publisher: American Meteorological Society
Abstract: uring the last decade, Arctic sea ice cover has experienced an accelerated decline that has been suggested to drive the increased occurrence of extremely cold winter events over continental Europe. Observations and modeling ...
High-Resolution Weather Forecasting over Complex Orography: Sensitivity to the Assimilation of Conventional Data
Publisher: American Meteorological Society
Abstract: Weather forecasting for regions with complex orography, as the Alps, presents several challenges and the task becomes even more difficult when high resolution is required. Moreover, for the Alpine region, some of the ...
Analyses of the Precipitation Pattern on the Alpine Region Using Different Cumulus Convection Parameterizations
Publisher: American Meteorological Society
Abstract: The analysis of several precipitation events occurring during June 1990 in the Alpine region is performed using the Pennsylvania State University?National Center for Atmospheric Research Fifth-Generation Mesoscale Model, ...
Effects of the PDO Phase on the Tropical Belt Width
Publisher: American Meteorological Society
Abstract: ecent studies have shown that the tropical belt (TB) has progressively expanded since at least the late 1970s. This trend has been largely attributed to the radiative forcing due to greenhouse gas (GHG) increase and ...