This title appears in the Scientific Report :
2005
Please use the identifier:
http://hdl.handle.net/2128/20817 in citations.
Please use the identifier: http://dx.doi.org/10.1029/2005GL022524 in citations.
Daytime formation of nitrous acid: a major source of OH radicals in a forest
Daytime formation of nitrous acid: a major source of OH radicals in a forest
Daytime concentrations of HONO, NOx, OH and photolysis frequencies were measured during the ECHO field campaign in a mixed deciduous forest near Julich, West-Germany, in summer 2003. Midday measurements show clear evidence for a large, yet unexplained daytime source of HONO (similar to 500 pptv/h),...
Saved in:
Personal Name(s): | Kleffmann, J. |
---|---|
Gavriloaiei, T. / Hofzumahaus, A. / Holland, F. / Koppmann, R. / Rupp, L. / Schlosser, E. / Siese, M. / Wahner, A. | |
Contributing Institute: |
Troposphäre; ICG-II |
Published in: | Geophysical research letters, 32 (2005) S. L05818 |
Imprint: |
Washington, DC
American Geophysical Union
2005
|
Physical Description: |
L05818 |
DOI: |
10.1029/2005GL022524 |
Document Type: |
Journal Article |
Research Program: |
Chemie und Dynamik der Geo-Biosphäre |
Series Title: |
Geophysical Research Letters
32 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1029/2005GL022524 in citations.
Daytime concentrations of HONO, NOx, OH and photolysis frequencies were measured during the ECHO field campaign in a mixed deciduous forest near Julich, West-Germany, in summer 2003. Midday measurements show clear evidence for a large, yet unexplained daytime source of HONO (similar to 500 pptv/h), which represents an important net source of OH radicals due to ongoing HONO photolysis. The evidence for a large HONO daytime source is for the first time completely constrained by measured parameters, needed to determine the daytime budget of HONO. The large contribution of 33% to the primary OH production during noon at the top of the forest canopy suggests that the unexplained source of HONO could have an important impact on the photochemical transformation of biogenically emitted volatile organic compounds (VOCs) by OH into partly oxidized VOCs and secondary organic aerosols during their release from forest regions into the troposphere. |