 |
| Titel |
Nighttime chemistry in DOMINO: Variable lifetimes and loss mechanisms for NO3 and N2O5 |
| VerfasserIn |
John N. Crowley, Jim Thieser, Mingjin Tang, Gerhard Schuster |
| Konferenz |
EGU General Assembly 2011
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250055088
|
|
|
|
|
|
| Zusammenfassung |
| Gas-phase and heterogeneous reactions of NO3 and N2O5 at night play an important role in
degradation of several organic trace gases and also in the removal of NOx. Application of a
steady-state analysis to N2O5 and NO3 measurements during DOMINO allows estimation of
the lifetime of NO3 and its role in nightime oxidation. NO3 lifetimes were highly variable,
with values approaching 20 min, but frequently less than 10 seconds. Long lifetimes were
associated with air masses which had spent several days over the Atlantic ocean, whereas the
shortest lifetimes were associated with air masses arriving from the oil-refining and industrial
centre of Huelva. Intermediate lifetimes were observed for continental air from central
Spain. Nighttime chemistry, including heterogeneous and gas-phase processes that
regulate the NO3 and N2O5 lifetimes is assessed for the various air-mass types. |
|
|
|
|
|
|