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DOI | 10.1098/rstb.2013.0124 |
Sensitivity of continental United States atmospheric budgets of oxidized and reduced nitrogen to dry deposition parametrizations | |
Dennis, Robin L.; Schwede, Donna B.; Bash, Jesse O.; Pleim, Jon E.; Walker, John T.; Foley, Kristen M. | |
发表日期 | 2013-07-05 |
ISSN | 0962-8436 |
卷号 | 368期号:1621 |
英文摘要 | Reactive nitrogen (N-r) is removed by surface fluxes (air-surface exchange) and wet deposition. The chemistry and physics of the atmosphere result in a complicated system in which competing chemical sources and sinks exist and impact that removal. Therefore, uncertainties are best examined with complete regional chemical transport models that simulate these feedbacks. We analysed several uncertainties in regional air quality model resistance analogue representations of air-surface exchange for unidirectional and bi-directional fluxes and their effect on the continental Nr budget. Model sensitivity tests of key parameters in dry deposition formulations showed that uncertainty estimates of continental total nitrogen deposition are surprisingly small, 5 per cent or less, owing to feedbacks in the chemistry and rebalancing among removal pathways. The largest uncertainties (5%) occur with the change from a unidirectional to a bi-directional NH3 formulation followed by uncertainties in bi-directional compensation points (1-4%) and unidirectional aerodynamic resistance (2%). Uncertainties have a greater effect at the local scale. Between unidirectional and bi-directional formulations, single grid cell changes can be up to 50 per cent, whereas 84 per cent of the cells have changes less than 30 per cent. For uncertainties within either formulation, single grid cell change can be up to 20 per cent, but for 90 per cent of the cells changes are less than 10 per cent. |
英文关键词 | atmospheric deposition;nitrogen budget;dry deposition uncertainty |
语种 | 英语 |
WOS记录号 | WOS:000319502100009 |
来源期刊 | PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES |
来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/60694 |
作者单位 | US EPA, Off Res & Dev, Res Triangle Pk, NC 27711 USA |
推荐引用方式 GB/T 7714 | Dennis, Robin L.,Schwede, Donna B.,Bash, Jesse O.,et al. Sensitivity of continental United States atmospheric budgets of oxidized and reduced nitrogen to dry deposition parametrizations[J]. 美国环保署,2013,368(1621). |
APA | Dennis, Robin L.,Schwede, Donna B.,Bash, Jesse O.,Pleim, Jon E.,Walker, John T.,&Foley, Kristen M..(2013).Sensitivity of continental United States atmospheric budgets of oxidized and reduced nitrogen to dry deposition parametrizations.PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,368(1621). |
MLA | Dennis, Robin L.,et al."Sensitivity of continental United States atmospheric budgets of oxidized and reduced nitrogen to dry deposition parametrizations".PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES 368.1621(2013). |
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