Sentences with phrase «photochemical models»

Recently, additional ozone production mechanisms have been proposed to resolve the ozone deficit problem, which arises from greater ozone destruction than production in several photochemical models of the upper stratosphere and lower mesosphere.

The Methods: Photochemical modeling by a Caltech team indicates that ethane, a hydrocarbon detected on Titan by both of the Voyager spacecraft and the European Infrared Space Observatory, is created when solar ultraviolet light breaks down methane, a minor component of Titan's nitrogen - rich atmosphere, into a stew of organic molecules that form a dense orange - brown smog.

Joanna Haigh and colleagues now show that these spectral variations — when incorporated into a radiative - photochemical model — lead to decreases in ozone below 45 kilometres and increases above.

Langmann, B., and S.E. Bauer, 2002: On the importance of reliable background concentrations of ozone for regional scale photochemical modelling.

Our results, simulated with a radiative - photochemical model, are consistent with contemporaneous measurements of ozone from the Aura - MLS satellite, although the short time period makes precise attribution to solar effects difficult.

Not exact matches

A detailed ozone model budget analysis was performed with simultaneous observations of O3, HCl, H2O, CH4, NO, and NO2 from the Halogen Occultation Experiment (HALOE) on the Upper Atmosphere Research Satellite (UARS) under conditions with the strongest photochemical control of ozone.

On the contrary, the use of currently recommended photochemical parameters leads to insufficient ozone destruction in the model.

Charnay would next like to model the other potential cause of the exoplanet's flat spectrum: photochemical haze, which gives Titan its shrouded orange atmosphere and Los Angeles its persistent dome of polluted air.

«Addressing the photochemical fate of carbon in Siberia provided us with a wealth of information that we can use in the future as we try to move forward and develop models to predict the fuller effects of climate change,» Stubbins said.

Due to the important role of ozone in driving temperature changes in the stratosphere as well as radiative forcing of surface climate, several different groups have provided databases characterizing the time - varying concentrations of this key gas that can be used to force global climate change simulations (particularly for those models that do not calculate ozone from photochemical principles).

Langmann, B., S.E. Bauer, and I. Bey, 2003: The influence of the global photochemical composition of the troposphere on European summer smog, Part I: Application of a global to mesoscale model chain.