TY  - JOUR
AU  - Meusel, Hannah
AU  - Kuhn, Uwe
AU  - Reiffs, Andreas
AU  - Mallik, Chinmay
AU  - Harder, Hartwig
AU  - Martinez, Monica
AU  - Schuladen, Jan
AU  - Bohn, Birger
AU  - Parchatka, Uwe
AU  - Crowley, John N.
AU  - Fischer, Horst
AU  - Tomsche, Laura
AU  - Novelli, Anna
AU  - Hoffmann, Thorsten
AU  - Janssen, Ruud H. H.
AU  - Hartogensis, Oscar
AU  - Pikridas, Michael
AU  - Vrekoussis, Mihalis
AU  - Bourtsoukidis, Efstratios
AU  - Weber, Bettina
AU  - Lelieveld, Jos
AU  - Williams, Jonathan
AU  - Pöschl, Ulrich
AU  - Cheng, Yafang
AU  - Su, Hang
TI  - Daytime formation of nitrous acid at a coastal remote site in Cyprus indicating a common ground source of atmospheric HONO and NO
JO  - Atmospheric chemistry and physics
VL  - 16
IS  - 22
SN  - 1680-7324
CY  - Katlenburg-Lindau
PB  - EGU
M1  - FZJ-2016-07490
SP  - 14475 - 14493
PY  - 2016
AB  - Characterization of daytime sources of nitrous acid (HONO) is crucial to understand atmospheric oxidation and radical cycling in the planetary boundary layer. HONO and numerous other atmospheric trace constituents were measured on the Mediterranean island of Cyprus during the CYPHEX (CYprus PHotochemical EXperiment) campaign in summer 2014. Average volume mixing ratios of HONO were 35 pptv (±25 pptv) with a HONO ∕ NOx ratio of 0.33, which was considerably higher than reported for most other rural and urban regions. Diel profiles of HONO showed peak values in the late morning (60 ± 28 pptv around 09:00 local time) and persistently high mixing ratios during daytime (45 ± 18 pptv), indicating that the photolytic loss of HONO is compensated by a strong daytime source. Budget analyses revealed unidentified sources producing up to 3.4  ×  106 molecules cm−3 s−1 of HONO and up to 2.0  ×  107 molecules cm−3 s−1 NO. Under humid conditions (relative humidity  >  70 %), the source strengths of HONO and NO exhibited a close linear correlation (R2 = 0.72), suggesting a common source that may be attributable to emissions from microbial communities on soil surfaces.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000388187800003
DO  - DOI:10.5194/acp-16-14475-2016
UR  - https://juser.fz-juelich.de/record/824994
ER  -