Total VOC reactivity in the planetary boundary layer 2. A new indicator for determining the sensitivity of the ozone production to VOC and NOx

A new indicator is proposed to det. whether tropospheric O3 prodn. in a specific area is limited by volatile org. compds. (VOC) or NOx. This indicator, tVOCOH/tNOxOH, describes the ratio of OH- lifetime vs. losses by reaction with VOC and NOx. Whereas tNOxOH can be obtained by conventional measurements, the new pump and probe OH approach makes it possible to also obtain tVOCOH. Indicator values above a threshold value of 0.2 +- 50% are representative of NOx-satd. conditions, where an increase of NOx emissions causes lower O3 prodn. For values <0.01, O3 prodn. is very insensitive to changes of VOC emissions. The robustness of this indicator against several parameters (temp., humidity, photolysis, initial O3 concn.) was tested in a box model and compared to the robustness of other earlier proposed indicators. In contrast to earlier proposed indicators, this new one is not based on photochem. produced long-lived species, but describes the instantaneous regime of an air parcel. Three-dimensional modeling showed this indicator is quite successful for estg. the impact of increased or reduced emissions on O3 concns. for each location in the modeled area. This will make it a very helpful tool for developing O3 abatement strategies.


Published in:
Journal of Geophysical Research, 106, 3, 3095-3110
Year:
2001
Keywords:
Note:
Copyright 2003 ACS
CAPLUS
AN 2001:166389
CAN 134:270320
59-2
Air Pollution and Industrial Hygiene
53
Air Pollution Laboratory,Swiss Federal Institute of Technology,Lausanne,Switz. FIELD URL:
Journal
JGRDE3
written in English.
Air pollution; Simulation and Modeling (indicator and model to det. limitation of ozone prodn. to sensitivity to volatile org. compds. and nitrogen oxide reactivity in planetary boundary layer); Aldehydes; Alkanes; Alkenes; Ketones; Volatile organic compounds Role: POL (Pollutant), RCT (Reactant), OCCU (Occurrence), RACT (Reactant or reagent) (indicator and model to det. limitation of ozone prodn. to sensitivity to volatile org. compds. and nitrogen oxide reactivity in planetary boundary layer); Air pollution (photochem.; indicator and model to det. limitation of ozone prodn. to sensitivity to volatile org. compds. and nitrogen oxide reactivity in planetary boundary layer)
Calpini, B; Analusis 1999, 27, 328|Clappier, A; Proceedings of the International Scientific Workshop \"Athens 2004 Air Quality Study\" 1997, 133|Clappier, A; J Appl Meteorol 1999, 39, 563|Finlayson-Pitts, B; Atmospheric Chemistry: Fundamentals and Experimental Techniques 1986|Fiorani, L; Atmos Environ 1997, 32, 2151|Jeanneret, F; J Geophys Res, this issue|Junier, M; diploma work, Swiss Fed Inst of Technol 1998|Kleinman, L; J Geophys Res 1986, 91, 10889|Kleinman, L; J Geophys Res 1991, 96, 20721|Kuhn, M; Atmos Environ 1998, 32, 693|Lu, C; J Geophys Res 1998, 103, 3453|Milford, J; J Geophys Res 1994, 99, 3533|Perego, S; Meteorol Atmos Phys 1999, 70, 43|Schayes, G; J Appl Meteorol 1996, 35, 1815|Sillman, S; J Geophys Res 1995, 100, 14175|Sillman, S; J Air Waste Manage Assoc 1997, 47, 1030|Sillman, S; J Geophys Res 1998, 103, 22629|Stockwell, W; Atmos Environ 1986, 20, 1615|Stockwell, W; J Geophys Res 1990, 95, 16343|Stockwell, W; J Geophys Res 1997, 102, 25847|Thunis, P; Formulation and evaluation of a nonhydrostatic vorticity-mode mesoscale model 1995|Tonnesen, G; J Geophys Res 2000, 105, 9213|Tonnesen, G; J Geophys Res 2000, 105, 9227|Ziomas, I; Atmos Environ 1998, 32, 2055|Ziomas, I; Atmos Environ 1998, 32, 2313
Laboratories:




 Record created 2011-02-01, last modified 2018-01-28


Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)