 |
| Titel |
ClNO2 and nitrate (NO3-) formation via N2O5 uptake to particles: Derivation of N2O5 uptake coefficients from ambient datasets |
| VerfasserIn |
Gavin J. Phillips, Jim Thieser, Ming J. Tang, Nicolas Sobanski, Johannes Fachinger, Frank Drewnick, Jos Lelieveld  , John N. Crowley |
| Konferenz |
EGU General Assembly 2015
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250110440
|
| Publikation (Nr.) |
 EGU/EGU2015-10435.pdf |
|
|
|
|
|
| Zusammenfassung |
| We present estimates of the uptake coefficient of N2O5, γ(N2O5), using ambient
measurements of the trace gases N2O5 and ClNO2 and particle composition and
surface area at the Kleiner Feldberg observatory, near Frankfurt, SW Germany,
during the PARADE campaign (summer 2011). Three methods used to extract
γ(N2O5) from the datasets were found to be in reasonable agreement, generating
values between 0.001 and 0.4. γ(N2O5) displayed a significant dependence on
relative humidity (RH), the largest values obtained, as expected, at high RH. No
significant dependence of γ(N2O5) on particle organic content or sulphate-to-organic
ratio was observed. The variability in γ(N2O5) is however large, indicating that
humidity is not the sole factor determining the uptake coefficient. There is also an
indication that the yield of ClNO2 with respect to N2O5 uptake is larger with lower
concentrations of PM1 total organics. Our results will be compared to existing
uptake coefficients from laboratory studies and those derived from field-observations. |
|
|
|
|
|
|