Convective Downmixing of Plumes in a Coastal Environment

McRae, Gregory J.; Shair, F. H.; Seinfeld, John H.

doi:10.1175/1520-0450(1981)020<1312:cdopia>2.0.co;2

Cited by 22 publications

(6 citation statements)

References 25 publications

(19 reference statements)

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“…3). A similar behaviour of momentum downmixing has been reported for other locations (Banta and Cotton, 1981; McRae et al, 1981; Haeger‐Eugensson, 1999).…”

Section: Resultssupporting

confidence: 86%

Ground-based off-line aerosol measurements at Praia, Cape Verde, during the Saharan Mineral Dust Experiment: microphysical properties and mineralogy

Kandler

Schütz

Jäckel

et al. 2011

Tellus B: Chemical and Physical Meteorology

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A B S T R A C TA large field experiment of the Saharan Mineral Dust Experiment (SAMUM) was performed in Praia, Cape Verde, in January and February 2008. This work reports on the aerosol mass concentrations, size distributions and mineralogical composition of the aerosol arriving at Praia. Three dust periods were recorded during the measurements, divided by transitional periods and embedded in maritime-influenced situations. The total suspended particle mass/PM 10 /PM 2.5 were 250/180/74 μg/m 3 on average for the first dust period (17-21 January) and 250/230/83 μg/m 3 for the second (24-26 January). The third period (28 January to 2 February) was the most intensive with 410/340/130 μg/m 3 . Four modes were identified in the size distribution. The first mode (50-70 nm) and partly the second (700-1100 nm) can be regarded as of marine origin, but some dust contributes to the latter. The third mode (2-4 μm) is dominated by advected dust, while the intermittently occurring fourth mode (15-70 μm) may have a local contribution. The dust consisted of kaolinite (dust/maritime period: 35%wt./25%wt.), K-feldspar (20%wt./25%wt.), illite (14%wt./10%wt.), quartz (11%wt./8%wt.), smectites (6%wt./4%wt.), plagioclase (6%wt./1%wt.), gypsum (4%wt./7%wt.), halite (2%wt./17%wt.) and calcite (2%wt./3%wt.).

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“…3). A similar behaviour of momentum downmixing has been reported for other locations (Banta and Cotton, 1981; McRae et al, 1981; Haeger‐Eugensson, 1999).…”

Section: Resultssupporting

confidence: 86%

Ground-based off-line aerosol measurements at Praia, Cape Verde, during the Saharan Mineral Dust Experiment: microphysical properties and mineralogy

Kandler

Schütz

Jäckel

et al. 2011

Tellus B: Chemical and Physical Meteorology

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“…Referring to leg EF in Figure 6, the elevated haze layer can be seen descending toward the surface downwind of point Y (between E and Y), with the haze distribution approaching uniformly mixed conditions near E. Given an easterly wind averaging 8 m s_1 at 1 km over point Y, air parcels travel the distance from point W to point Y in approximately 20 min. Similar fumigation rates in a coastal environment have been previously reported (21). Under conditions of easterly flow, most surface fumigation in this region occurs downwind of areas with high surface heat flux (H and Y).…”

Section: Case I: Aug 2 1980 Southeastern United Statessupporting

confidence: 83%

Airborne lidar observations of long-range transport in the free troposphere

Shipley¹,

Browell²,

McDougal³

et al. 1984

Environ. Sci. Technol.

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“…The conditions in Athens are similar to those in Los Angeles, which also is characterized by land-sea-breeze recirculation and clear skies (e.g., Businger 1975;McRae et al 1981;Lu and Turco 1996) but has more dense emissions. In this paper, results from the dynamical/photochemical topographic vorticity-mode mesoscale (TVM) model using the Lurmann-Carter-Coyner (LCC;Lurmann et al 1987) chemical mechanism are compared with measurements (ground-based, aircraft, and lidar) made from 12 to 14 September 1994 during the MEDCA-PHOT-TRACE campaign.…”

Section: Fig 2 Horizontal Projection Of the 12mentioning

confidence: 73%

Effect of Sea Breeze on Air Pollution in the Greater Athens Area. Part I: Numerical Simulations and Field Observations

Clappier¹,

Martilli²,

Grossi³

et al. 2000

J. Appl. Meteor.

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Numerical simulations compared with field measurements are used to explain the effect of sea breezes on photochemical smog episodes in Athens during the Mediterranean Campaign of Photochemical Tracers on 12-14 September 1994. The numerical simulations, performed using a nonhydrostatic vorticity mesoscale model coupled to the Lurmann-Carter-Coyner photochemical module, are compared with ground-based lidar and aircraft measurements. The current analysis shows that the three selected days include the two main summertime flow patterns characteristic of the Athens peninsula, each of which lead to significantly different pollution amounts. On 12 and 13 September, a strong, northerly synoptic wind reduces the inland penetration of the sea breeze so that ozone concentrations within the greater Athens area remained low. In contrast, the weaker synoptic forcing on 14 September allowed the development of sea breezes over the whole peninsula and high ozone concentrations were found north and east of the city. An analysis based on pollution amounts and wind patterns is carried out to divide the peninsula into regions, each of which corresponds to a specific pollutant behavior.

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Convective Downmixing of Plumes in a Coastal Environment

Cited by 22 publications

References 25 publications

Ground-based off-line aerosol measurements at Praia, Cape Verde, during the Saharan Mineral Dust Experiment: microphysical properties and mineralogy

Ground-based off-line aerosol measurements at Praia, Cape Verde, during the Saharan Mineral Dust Experiment: microphysical properties and mineralogy

Airborne lidar observations of long-range transport in the free troposphere

Effect of Sea Breeze on Air Pollution in the Greater Athens Area. Part I: Numerical Simulations and Field Observations

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