Modelling the dry deposition velocity of highly soluble gases to the sea surface

Joffre, Sylvain M.

doi:10.1016/0004-6981(88)90343-5

Cited by 40 publications

(15 citation statements)

References 42 publications

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“…10, since when compared to the model (Eq. 5) of Brutsaert and Sugita (1996) or Joffre (1988), which are close to each other, as Re * varies between typical value of 10 2 to 10 4 , the Zilitinkevich model yields value of κB −1 =− ln(z 0t /z 0m ) between 0.1 and 4, while the Brutsaert-Joffre version varies between 5 and 22.…”

Section: Model Descriptionsupporting

confidence: 57%

“…Thus, the formulation of Brutsaert and Sugita (1996) for example can be suggested for urban areas. Including the modification by Joffre (1988), using the Reichardt's profile, to the Brutsaert's assumption concerning the level below which the log-profile is not valid, the following formulation can be recommended for various bluff types of roughness over a wide range of the roughness Reynolds number (0.1≤Re * ≤100):…”

Section: Urban Storage Heat Fluxesmentioning

confidence: 99%

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Towards improving the simulation of meteorological fields in urban areas through updated/advanced surface fluxes description

et al. 2008

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Abstract. The increased resolution of numerical weather prediction models allows nowadays addressing more realistically urban meteorology and air pollution processes. This has triggered new interest in modelling and describing experimentally the specific features and processes of urban areas. Recent developments and results performed within the EU-funded project FUMAPEX on integrated systems for forecasting urban meteorology and air pollution are reported here. Sensitivity studies with respect to optimum resolution, parametrisation of urban roughness and surface exchange fluxes and the role of urban soil layers are carried out with advanced meso-or sub-meso meteorological models. They show that sensible improvements can be achieved by higher model resolution that is accompanied with better description of urban surface features. Recommendations, especially with respect to advanced urban air quality forecasting and information systems, are given together with an assessment of the needed further research and data.

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Section: Model Descriptionsupporting

confidence: 57%

Section: Urban Storage Heat Fluxesmentioning

confidence: 99%

Towards improving the simulation of meteorological fields in urban areas through updated/advanced surface fluxes description

et al. 2008

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“…The observed declining trend could also be attributed to the dry deposition of Hg(0) onto the snowpack. The dry deposition velocity is defined as follows (Joffre, 1988), as the ratio between the deposition flux F (ng m −2 s −1 ) and the concentration C (ng m −3 ):…”

Section: Wintermentioning

confidence: 99%

New insights into the atmospheric mercury cycling in central Antarctica and implications on a continental scale

et al. 2016

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Abstract. Under the framework of the GMOS project (Global Mercury Observation System) atmospheric mercury monitoring has been implemented at Concordia Station on the high-altitude Antarctic plateau (75 • 06 S, 123 • 20 E, 3220 m above sea level). We report here the first year-round measurements of gaseous elemental mercury (Hg(0)) in the atmosphere and in snowpack interstitial air on the East Antarctic ice sheet. This unique data set shows evidence of an intense oxidation of atmospheric Hg(0) in summer (24-hour daylight) due to the high oxidative capacity of the Antarctic plateau atmosphere in this period of the year. Summertime Hg(0) concentrations exhibited a pronounced daily cycle in ambient air with maximal concentrations around midday. Photochemical reactions and chemical exchange at the air-snow interface were prominent, highlighting the role of the snowpack on the atmospheric mercury cycle. Our observations reveal a 20 to 30 % decrease of atmospheric Hg(0) concentrations from May to mid-August (winter, 24 h darkness). This phenomenon has not been reported elsewhere and possibly results from the dry deposition of Hg(0) onto the snowpack. We also reveal the occurrence of multi-day to weeklong atmospheric Hg(0) depletion events in summer, not associated with depletions of ozone, and likely due to a stagnation of air masses above the plateau triggering an accumulation of oxidants within the shallow boundary layer. Our observations suggest that the inland atmospheric reservoir is depleted in Hg(0) in summer. Due to katabatic winds flowing out from the Antarctic plateau down the steep vertical drops along the coast and according to observations at coastal Antarctic stations, the striking reactivity observed on the plateau most likely influences the cycle of atmospheric mercury on a continental scale.

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“…The parameter z s refers to the level where the concentration becomes zero or has reached the equilibrium concentration with the water phase. In Joffre [1988] and Asman et al [1994], z s was computed for smooth conditions ( Re < 0.13) from and for rough conditions ( Re > 0.13) from Re is the Reynolds number and Sc is the Schmidt number: …”

Section: Calculating the Surface Fluxmentioning

confidence: 99%

Flux divergence of nitric acid in the marine atmospheric surface layer

Sørensen¹

2005

J. Geophys. Res.

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[1] It is hypothesized that removal of HNO 3 from the atmosphere close to the sea surface is due to two processes: dry deposition to the sea surface and chemical reaction with sea spray. The latter process invalidates the application of the constant flux layer assumption to calculate dry deposition based on concentrations of HNO 3 at, e.g., a reference height of 10 m. A field experiment was carried out to investigate this hypothesis, and the measured concentration profiles were found to differ dramatically from the log linear profiles, which would have been produced by turbulent transport only. Surface fluxes of HNO 3 were calculated from the measured profiles taking chemical reactions into account and were compared to surface fluxes calculated by the traditional resistance method. It was found that the surface fluxes could be a factor of two less when chemical reactions are taken into account, depending on the characteristics of the near-surface aerosols. HNO 3 loss rates due to heterogeneous chemistry are calculated by two independent methods and are compared.Citation: Sørensen, L. L., S. C. Pryor, G. de Leeuw, and M. Schulz (2005), Flux divergence of nitric acid in the marine atmospheric surface layer,

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Modelling the dry deposition velocity of highly soluble gases to the sea surface

Cited by 40 publications

References 42 publications

Towards improving the simulation of meteorological fields in urban areas through updated/advanced surface fluxes description

Towards improving the simulation of meteorological fields in urban areas through updated/advanced surface fluxes description

New insights into the atmospheric mercury cycling in central Antarctica and implications on a continental scale

Flux divergence of nitric acid in the marine atmospheric surface layer

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