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Modelling of cirrus clouds – Part 2: Competition of different nucleation mechanisms
Modelling of cirrus clouds different nucleation mechanisms
2009/5/7
We study the competition of two different freezing mechanisms (homogeneous and heterogeneous freezing) in the same environment for cold cirrus clouds. To this goal we use the recently developed and va...
Transport mechanisms for synoptic, seasonal and interannual SF6 variations and“age”of air in troposphere
Transport mechanisms synoptic seasonal interannual SF6 variations troposphere
2009/3/13
We use an atmospheric general circulation model (AGCM) driven chemistry-transport model (ACTM) to simulate the evolution of sulfur hexafluoride (SF6) in the troposphere. The model results are compared...
Freezing thresholds and cirrus cloud formation mechanisms inferred from in situ measurements of relative humidity
Freezing thresholds cirrus cloud formation mechanisms humidity
2009/3/11
Factors controlling the microphysical link between distributions of relative humidity above ice saturation in the upper troposphere and lowermost stratosphere and cirrus clouds are examined with the h...
Ultrathin Tropical Tropopause Clouds（UTTCs）：II. Stabilization mechanisms
Ultrathin Tropical Tropopause Clouds UTTCs Stabilization mechanisms
2009/3/11
Mechanisms by which subvisible cirrus clouds (SVCs) might contribute to dehydration close to the tropical tropopause are not well understood. Recently Ultrathin Tropical Tropopause Clouds (UTTCs) with...
Modelling of the photooxidation of toluene: conceptual ideas for validating detailed mechanisms
photooxidation of toluene conceptual ideas validating detailed mechanisms
2009/3/10
Toluene photooxidation is chosen as an example to examine how simulations of smog-chamber experiments can be used to unravel shortcomings in detailed mechanisms and to provide information on complex...
Equilibrium Mechanisms within the Oceanic Internal Wave Field
Equilibrium Mechanisms Oceanic Internal Wave Field
2009/3/7
Numerical computations indicate that the nonlinear self-interaction mechanisms, induced diffusion and elastic scattering generate a universal equilibrium spectrum of deep ocean internal waves. This sp...
Systematic reduction of complex tropospheric chemical mechanisms, Part II: Lumping using a time-scale based approach
complex tropospheric chemical mechanisms Lumping time-scale
2009/3/6
This paper presents a formal method of species lumping that can be applied automatically to intermediate compounds within detailed and complex tropospheric chemical reaction schemes. The method is bas...
Systematic reduction of complex tropospheric chemical mechanisms, Part I: sensitivity and time-scale analyses
complex tropospheric chemical mechanisms sensitivity time-scale
2009/3/6
Explicit mechanisms describing the complex degradation pathways of atmospheric volatile organic compounds (VOCs) are important, since they allow the study of the contribution of individual VOCS to sec...
Dissipation Mechanisms and the Importance of Eddies in Model Ocean Energy Budgets
Dissipation Mechanisms Ocean Energy Budgets
2009/2/16
The importance of mesoscale eddies in the basin energy budgets of closed-basin numerical model oceanic systems that attempt to resolve such motions varies greatly from calculation to calculation. In e...
Influence of mountain waves and NAT nucleation mechanisms on polar stratospheric cloud formation at local and synoptic scales during the 1999-2000 Arctic winter
mountain waves NAT nucleation mechanisms polar stratospheric cloud formation Arctic winter
2009/2/7
A scheme for introducing mountain wave-induced temperature pertubations in a microphysical PSC model has been developed. A data set of temperature fluctuations attributable to mountain waves as comput...
Evaluation of detailed aromatic mechanisms（MCMv3 and MCMv3.1）against environmental chamber data
aromatic mechanisms MCMv3 MCMv3.1 environmental chamber data
2009/2/7
A high quality dataset on the photo-oxidation of benzene, toluene, p-xylene and 1,3,5-trimethylbenzene has been obtained from experiments in the European Photoreactor (EUPHORE), a large outdoor enviro...
Atmosphere-Ocean Mechanisms of Climate Anomalies in the Angola-Tropical Atlantic Sector
sea surface temperature Atmosphere-Ocean Mechanisms Angola-Tropical Atlantic Sector
2009/2/5
Interannual variations in the large-scale atmospheric and oceanic fields over the tropical Atlantic are studied in relation to rainfall anomalies on the Angola coast. Departure patterns are constructe...
Atmospheric sulphuric acid and aerosol formation: implications from atmospheric measurements for nucleation and early growth mechanisms
Atmospheric sulphuric acid aerosol formation atmospheric measurements early growth mechanisms
2009/1/15
We have investigated the formation and early growth of atmospheric secondary aerosol particles building on atmospheric measurements. The measurements were part of the QUEST 2 campaign which took place...
Sub-continental transport mechanisms and pathways during two ozone episodes in northern Spain
Sub-continental transport mechanisms pathways ozone episodes northern Spain
2009/1/7
Two ozone episodes (occurring in June 2001 and June 2003) in the air quality monitoring network of the Basque Country (BC) are analyzed. The population information threshold was exceeded in many stati...
Intrusive Mixing in a Mediterranean Salt Lens—Intrusion Slopes and Dynamical Mechanisms
Dynamical Mechanisms Mediterranean Salt Lens—Intrusion Slopes Intrusive Mixing
2008/12/23
Thermohaline intrusions found in Meddy “Sharon” were laterally coherent The slope of these intrusions across density surfaces was in opposite senses in the upper and lower part of the meddy, consisten...