 |
| Titel |
Multi-seasonal OH and (HO2+RO2) observations in the coastal Antarctic boundary layer |
| VerfasserIn |
Anna Jones, Neil Brough, Greg Huey, Dave Tanner, Eric Wolff |
| Konferenz |
EGU General Assembly 2013
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250075831
|
|
|
|
|
|
| Zusammenfassung |
| The OH radical is a central driver of tropospheric chemistry through its role as an
atmospheric oxidant. At high latitudes, the “classic” primary OH source (via reaction
of electronically excited O(1D) atoms with water molecules) is enhanced by the
influence of HOx precursors (HCHO, H2O2, HONO) emitted from the snowpack.
Further, snowpack-released NOx influences OH:HO2 and OH:RO2 ratios as well as
concentrations.
During 2007, a chemical ionistation mass spectrometer (CIMS) was operated at Halley
research station in coastal Antarctica throughout a full calendar year. Measurements for OH
and (HO2+RO2) were made in each season. Here we present the data, and compare them with
equivalent measurements at other polar (Arctic and Antarctic) locations. A first
interpretation is made in terms of the prevailing meteorological conditions and ambient
chemistry. |
|
|
|
|
|
|