| Autor: |
Gupta, ML, Cicerone, RJ, Elliott, S |
| Jazyk: |
angličtina |
| Rok vydání: |
1998 |
| Zdroj: |
Gupta, ML; Cicerone, RJ; & Elliott, S. (1998). Perturbation to global tropospheric oxidizing capacity due to latitudinal redistribution of surface sources of NO(x), CH4and CO. Geophysical Research Letters, 25(21), 3931-3934. doi: 10.1029/1998GL900099. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/2fz582bp |
| DOI: |
10.1029/1998GL900099. |
| Popis: |
Economic and social projections indicate that during next several decades there will be major geographical redistribution of surface emissions of O3precursors, such as NO(x), CH4and CO. A net decrease in their emissions from northern hemispheric mid-latitudes will be accompanied by substantial increases from the tropics. We have investigated a hypothetical scenario of currently underway transition of such emission patterns using a global two-dimensional photochemical model. With overall O3precursor releases held constant, a simultaneous transfer of their emissions by 25% from the latitude belt 75°N-35°N to 5°S-35°N increases tropospheric oxidizing capacity such that the methane global lifetime and concentrations fall by more than 3%. Seasonally dependent changes in surface O3concentrations are also calculated. In influencing OH concentration, redistribution of surface NO(x) emissions is 2-3 orders of magnitude more efficient per unit mass than CO emissions. Shifts in methane sources have insignificant effects on global photochemistry, but lead to a decrease in its interhemispheric gradient. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
