Estimation of dry deposition velocities in North America
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Estimation of dry deposition velocities in North America by A. Sirois

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Published by Environment Canada, Atmospheric Environment Service in [Downsview, Ont.] .
Written in English


Book details:

Edition Notes

Other titlesThe land-use data bank.
Statementby A. Sirois and E.C. Voldner.
SeriesCanadian meteorological research reports -- CMRR 1/84
ContributionsVoldner, E. C., 1942-., Canada. Atmospheric Environment Service.
The Physical Object
Paginationv. :
ID Numbers
Open LibraryOL15437994M
LC Control Number85071042
OCLC/WorldCa16048659

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Again, our dry deposition results are in general agreement in terms of spatial pattern and magnitude, with NO 2 dry deposition ranging in North America from ~ to kg N ha −1 yr −1, and the NH 3 values ranging from ~ to 10 kg N ha −1 yr −1, which are comparable to our values in Figure S2, especially considering the different Cited by: BibTeX @ARTICLE{Miller05estimationand, author = {Eric K. Miller and Alan Vanarsdale and Gerald J. Keeler and Ann Chalmers and Laurier Poissant and Neil C. Kamman and Raynald Brulotte}, title = {Estimation and mapping of wet and dry mercury deposition across northeastern North America}, journal = {Ecotoxicology}, year = {}, pages = {}}.   Based on yearly mean concentrations (June –May ) and fixed dry deposition velocities the dry deposition flux of gaseous NH 3 and NO 2 are estimated to be and kg N ha −1 yr −1, respectively, while the estimates for particulate ammonium (NH + 4) and nitrate (NO − 3) are and kg N ha −1 yr −1, respectively Cited by: Dry deposition of speciated mercury, i.e., gaseous oxidized mercury (GOM), particulate bound mercury (PBM), and gaseous elemental mercury (GEM), was estimated for the year at 19 monitoring locations in Eastern and Central North America. Dry deposition estimates were obtained by combining monitored hourly speciated ambient concentration with modeled hourly dry deposition.

Dry deposition of speciated mercury, i.e., gaseous oxidized mercury (GOM), particulate-bound mercury (PBM), and gaseous elemental mercury (GEM), was estimated for the year – at 19 monitoring locations in eastern and central North America. Dry deposition estimates were obtained by combining monitored twoto four-hourly speciated ambient concentrations with modeled hourly dry deposition.   In this paper we attempt to estimate the amount of dry N deposition from NO 2 +PAN by utilizing concentration estimates from a regional-scale air quality forecast model run for a full year (1 May –30 April ). The model is needed to estimate NO 2 and PAN concentrations which are not routinely measured at rural and remote sites in North America. Sirois A. and Voldner E.C.: , Estimation of dry deposition velocities in North America part I: The land-use data bank, Canadian Meteorological Research Report CMRR l/84, pp. Google Scholar Slinn, W.G.N: , Atmospheric Environment, 16, Google Scholar. Higher precipitation rates, lower dry deposition velocities (caused by lower wind speeds), and slightly lower aerosol concentrations in the south may all contribute to this. In the north, the wet deposition contributes 15%–50% of the total NO 3 − flux, with the highest dry–wet ratio being observed during JJA. Similar dry–wet ratios were.

Dry deposition of speciated mercury, i.e., gaseous oxidized mercury (GOM), particulate-bound mercury (PBM), and gaseous elemental mercury (GEM), was estimated for the year at 19 monitoring locations in eastern and central North America. Dry deposition estimates . Dry deposition processes play an important role in delivering acidic SOx and NOx to the surface. Modeled regional S and N budgets in North America indicate that about half of the total deposition is dry deposited. Thus, there is advantage to be gained in more accurately representing dry deposition in ‘acid deposition’ model calculations. A scheme, based on a resistance analogy, for. Zhang et al. used a method similar to our study to estimate dry Hg deposition to 19 monitoring locations in Eastern and Central North America, which included our monitoring site at HF. The average PBM, GOM and GEM deposition fluxes at HF from Zhang et al. [63] were g m yr, g m yr, and g m yr, respectively. @article{osti_, title = {Dry deposition velocities}, author = {Sehmel, G. A.}, abstractNote = {Dry deposition velocities are very difficult to predict accurately. In this article, reported values of dry deposition velocities are summarized. This summary includes values from the literature on field measurements of gas and particle dry deposition velocities, and the uncertainties inherent.