The Role of Atmospheric Boundary Layer Processes in Atmospheric Chemistry
نویسندگان
چکیده
WHAT: Junior and senior researchers identified, discussed, and studied outstanding issues related to atmospheric boundary layer processes closely linked to atmospheric chemistry WHEN: 20–24 November 2006 WHERE: Castelldefels, Spain he importance of atmospheric boundary layer (ABL) dynamics and physics in controlling key aspects of atmospheric chemistry is becoming increasingly recognized. Processes such as dispersion, mixing, transformation, and deposition are strongly dependent on the stratification of the ABL, on the presence of clouds, and on the interaction between land and the ABL. Its location as a buffer region between the biosphere and the free troposphere makes this layer very relevant to air quality issues and the global climate problem. Therefore, to obtain a thorough understanding of the temporal evolution and spatial distribution of atmospheric compounds, it is necessary to investigate the myriad linkages between the prevailing physical processes and the chemistry of their constituents. In the past, these subjects have often been investigated separately, eliminating the possibility for study of the potential feedbacks and couplings of the relevant processes in atmospheric chemistry. Toward the purpose of rectifying this historic segregation, the interdisciplinary “Research School” was organized to narrow the gap between the disciplines of atmospheric physics and chemistry, identify significant gaps of knowledge, and promote vital cross-disciplinary dialog among emerging scientists in both fields. In November 2006, we held a 5-day Research School attended by 27 students from 12 different THE ROLE OF ATMOSPHERIC BOUNDARY LAYER PROCESSES IN ATMOSPHERIC CHEMISTRY
منابع مشابه
Large-eddy simulation of turbulent flow over an array of wall-mounted cubes submerged in an emulated atmospheric boundary-layer
Turbulent flow over an array of wall-mounted cubic obstacles has been numerically investigated using large-eddy simulation. The simulations have been performed using high-performance computations with local cluster systems. The array of cubes are fully submerged in a simulated deep rough-wall atmospheric boundary-layer with high turbulence intensity characteristics of environmental turbulent fl...
متن کاملSimulation of entrainment near a density stratified layer: Laboratory experiment and LIDAR observation
In this paper a simple qualitative model of the growth of a mixed layer adjacent to a uniform layer with a stably stratified layer is presented. The depth variations of mixed layer can be estimated from direct measurements. The Entrainment of a stably stratified layer into a turbulent mixed layer in a confined region was studied in laboratory for different Richardson numbers. The internal waves...
متن کاملDescription and implementation of a MiXed Layer model (MXL, v1.0) for the dynamics of the atmospheric boundary layer in the Modular Earth Submodel System (MESSy)
We present a new submodel for the Modular Earth Submodel System (MESSy): the MiXed Layer (MXL) model for the diurnal dynamics of the convective boundary layer, including explicit representations of entrainment and surface fluxes. This submodel is embedded in a new MESSy base model (VERTICO), which represents a single atmospheric column. With the implementation of MXL in MESSy, MXL can be used i...
متن کاملRevealing the impact of changing land use of the annual spatiotemporal boundary layer height (Kermanshah Case Study)
Introduction Atmospheric boundary layer (ABL), is the lowest part of the atmosphere. Its behavior is directly influenced by its contact with earth surface. On earth it usually responds to changes in surface radiative forcing in an hour or less. In this layer physical quantities such as flow velocity, temperature, moisture, etc., display rapid fluctuations (turbulence) and vertical mixing is st...
متن کاملCombined effects of surface conditions, boundary layer dynamics and chemistry on diurnal SOA evolution
We study the combined effects of land surface conditions, atmospheric boundary layer dynamics and chemistry on the diurnal evolution of biogenic secondary organic aerosol in the atmospheric boundary layer, using a model that contains the essentials of all these components. First, we evaluate the model for a case study in Hyytiälä, Finland, and find that it is able to satisfactorily reproduce th...
متن کامل