1,733,777 research outputs found
Influence of modelled soil biogenic NO emissions on related trace gases and the atmospheric oxidizing efficiency
Get PDFThe emission of nitric oxide (NO) by soils (SNOx) is an important source of oxides of nitrogen (NO<sub>x</sub>=NO+NO<sub>2</sub>) in the troposphere, with estimates ranging from 4 to 21 Tg of nitrogen per year. Previous studies have examined the influence of SNOx on ozone (O<sub>3</sub>) chemistry. We employ the ECHAM5/MESSy atmospheric chemistry model (EMAC) to go further in the reaction chain and investigate the influence of SNOx on lower tropospheric NO<sub>x</sub>, O<sub>3</sub>, peroxyacetyl nitrate (PAN), nitric acid (HNO<sub>3</sub>), the hydroxyl radical (OH) and the lifetime of methane (&tau;<sub>CH<sub>4</sub></sub>). We show that SNOx is responsible for a significant contribution to the NO<sub>x</sub> mixing ratio in many regions, especially in the tropics. Furthermore, the concentration of OH is substantially increased due to SNOx, resulting in an enhanced oxidizing efficiency of the global troposphere, reflected in a ~10% decrease in &tau;<sub>CH<sub>4</sub></sub> due to soil NO emissions. On the other hand, in some regions SNOx has a negative feedback on the lifetime of NO<sub>x</sub> through O<sub>3</sub> and OH, which results in regional increases in the mixing ratio of NO<sub>x</sub> despite lower total emissions in a simulation without SNOx. In a sensitivity simulation in which we reduce the other surface NO<sub>x</sub> emissions by the same amount as SNOx, we find that they have a much weaker impact on OH and &tau;<sub>CH<sub>4</sub></sub> and do not result in an increase in the NO<sub>x</sub> mixing ratio anywhere
Block Card 2663 Middlesex Drive
No full textThis image was produced by the Auditor's Office in Lucas County, Ohio for tax assessment purposes. Associated dates are approximate. Descriptive terms related to this photograph include: Modern Colonial Style | 2663 Middlesex Drive (Toledo, Ohio) | Dwelling | Old Orchard Area (Toledo, Ohio) | Haughton Place Addition (Toledo, Ohio
Chicago, Rock Island & Pacific (RI) 2708 & 2663
No full textA photograph postcard (& negative) showing the Rock Island (RI) 2708 and 2663, 2-8-2's, on westbound freight, leaving Haileyville, OK, 44 cars, 25 mph. (climbing grade in coal mining area
Block Card 2663 Drummond Road
No full textThis image was produced by the Auditor's Office in Lucas County, Ohio for tax assessment purposes. Associated dates are approximate. Descriptive terms related to this photograph include: Garrison Colonial Style | 2663 Drummond Road (Toledo, Ohio) | Dwelling | Old Orchard Area (Toledo, Ohio) | Westgate Area (Toledo, Ohio) | Haughton Place Addition (Toledo, Ohio
Block Card 2663 Barrington Drive
No full textThis image was produced by the Auditor's Office in Lucas County, Ohio for tax assessment purposes. Associated dates are approximate. Descriptive terms related to this photograph include: English Cottage Style | 2663 Barrington Drive (Toledo, Ohio) | Dwelling | Old Orchard Area (Toledo, Ohio) | Haughton Place Addition (Toledo, Ohio
Código Sustantivo del Trabajo: decreto 2663 de 1950
No full textContiene el texto completo del código sustantivo del trabajo decreto 2663 de 195
Lyle, Allene P., 1919-2010 (SC 2663)
Get PDFFinding aid only for Manuscripts Small Collection 2663. Autograph book kept by Allene P. Lyle while a student at College High School, Bowling Green, Kentucky, 1933; and a small notebook containing holographic and printed remedies and prescriptions
Código Sustantivo del Trabajo: decreto 2663 de 1950
No full textContiene el texto completo del código sustantivo del trabajo decreto 2663 de 1950
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