Bibliographic Citation
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| Title | Dry deposition flux calculations for the national dry deposition network. Report for January 1991-September 1992 |
| Creator/Author | Clarke, J.F. ; Edgerton, E.S. |
| Publication Date | 1993 Apr 01 |
| OSTI Identifier | OSTI ID: 6532592 |
| Report Number(s) | PB-93-178242/XAB |
| Other Number(s) | Other: CNN: EPA-68-02-4451 |
| Resource Type | Technical Report |
| Resource Relation | Other Information: See also PB--90-208570 and PB--91-181784 |
| Research Org | Environmental Science and Engineering, Inc., Durham, NC (United States) |
| Subject | 54 ENVIRONMENTAL SCIENCES; ACID RAIN; AIR POLLUTION MONITORING; ACIDIFICATION; ATMOSPHERIC CIRCULATION; CALCULATION METHODS; CHEMISTRY; DEPOSITION; DIFFUSION; ENVIRONMENTAL TRANSPORT; GASES; MAGNETIC FLUX; MATHEMATICAL MODELS; METEOROLOGY; NITRATES; NITRIC ACID; OZONE; PARTICLES; SAMPLING; SEASONAL VARIATIONS; SPATIAL DISTRIBUTION; SULFATES; SULFUR DIOXIDE; USA; VELOCITY; ATMOSPHERIC PRECIPITATIONS; CHALCOGENIDES; DEVELOPED COUNTRIES; DISTRIBUTION; FLUIDS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; MASS TRANSFER; MONITORING; NITROGEN COMPOUNDS; NORTH AMERICA; OXIDES; OXYGEN COMPOUNDS; RAIN; SULFUR COMPOUNDS; SULFUR OXIDES; VARIATIONS |
| Description/Abstract | The National Dry Deposition Network (NDDN) was established in 1987 to document the magnitude, spatial variability, and trends in dry deposition of ozone and acidic particles and gases across the United States. Currently, the network consists of 50 stations: 41 in the eastern United States and 9 in the western United States. The NDDN will be assimilated into the Clean Air Status and Trends Network (CASTNet). Dry deposition is not measured directly in the NDDN, but is determined by an inferential approach, i.e., dry deposition fluxes are calculated as the product of measured ambient concentration and modeled deposition velocity. Chemical species include O3, sulfate, nitrate, sulfur dioxide, and nitric acid. The temporal resolution for the dry deposition calculations is hourly for O3 and weekly for the acidic particles and gases. The report describes the dry deposition calculation method used in the NDDN/CASTNet program and presents dry deposition data for the network for 1990 and 1991. Sources of uncertainty in the calculations are discussed. |
| Country of Publication | United States |
| Language | English |
| Format | Medium: X; Size: Pages: (100 p) |
| Availability | NTIS |
| System Entry Date | 2008 Feb 08 |
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Last Updated: 11/19/2009