Jan Kleissl - Academia.edu (original) (raw)
Papers by Jan Kleissl
... the Smagorinsky coefficient, which is typically prescribed empirically and must be reduced by... more ... the Smagorinsky coefficient, which is typically prescribed empirically and must be reduced by a damping function close to the wall (Mason, 1994). This model as well as more advanced versions, which determine the coefficient dynamically during the simulation (Porté-Agel et al. ...
ABSTRACT During the Baltimore PM Supersite experiment highly time and size resolved concentration... more ABSTRACT During the Baltimore PM Supersite experiment highly time and size resolved concentrations of urban PM2.5 and its constituents were collected year round in 2002. Intensive measurement periods were conducted in the spring (March/April) and summer (July 1 - August 15). During those periods a backscatter lidar and a 3D sonic anemometer turbulence sensor provided information on vertical extent of the mixed layer, turbulence characteristics in the mixed layer, and entrainment dynamics. These data together with back trajectory calculations and radiosonde soundings allow good descriptions of the aerosol constituents and source attribution. A total of eleven high PM episodes are analyzed. The Canadian forest fire smoke event of July 6 - 8 is captured in great detail and other exemplary events for coastal air pollution are presented.
North American anthropogenic activities and biomass burning are both significant sources of nitro... more North American anthropogenic activities and biomass burning are both significant sources of nitrogen oxides emissions. Recent studies have indicated changes in the NOx\ to CO emission ratio in U.S. urban regions, and amplified response to global climate change in boreal regions is expected to result (and may already have resulted) in increased frequency of large boreal fires. The PICO-NARE mountaintop
... the Smagorinsky coefficient, which is typically prescribed empirically and must be reduced by... more ... the Smagorinsky coefficient, which is typically prescribed empirically and must be reduced by a damping function close to the wall (Mason, 1994). This model as well as more advanced versions, which determine the coefficient dynamically during the simulation (Porté-Agel et al. ...
ABSTRACT During the Baltimore PM Supersite experiment highly time and size resolved concentration... more ABSTRACT During the Baltimore PM Supersite experiment highly time and size resolved concentrations of urban PM2.5 and its constituents were collected year round in 2002. Intensive measurement periods were conducted in the spring (March/April) and summer (July 1 - August 15). During those periods a backscatter lidar and a 3D sonic anemometer turbulence sensor provided information on vertical extent of the mixed layer, turbulence characteristics in the mixed layer, and entrainment dynamics. These data together with back trajectory calculations and radiosonde soundings allow good descriptions of the aerosol constituents and source attribution. A total of eleven high PM episodes are analyzed. The Canadian forest fire smoke event of July 6 - 8 is captured in great detail and other exemplary events for coastal air pollution are presented.
North American anthropogenic activities and biomass burning are both significant sources of nitro... more North American anthropogenic activities and biomass burning are both significant sources of nitrogen oxides emissions. Recent studies have indicated changes in the NOx\ to CO emission ratio in U.S. urban regions, and amplified response to global climate change in boreal regions is expected to result (and may already have resulted) in increased frequency of large boreal fires. The PICO-NARE mountaintop