 |
| Titel |
In-situ observation of Asian pollution transported into the Arctic lowermost stratosphere |
| VerfasserIn |
A. Roiger, H. Schlager, A. Schäfler, H. Huntrieser, M. Scheibe, H. Aufmhoff, O. R. Cooper, H. Sodemann, A. Stohl, J. Burkhart, M. Lazzara, C. Schiller, K. S. Law, F. Arnold |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 11, no. 21 ; Nr. 11, no. 21 (2011-11-07), S.10975-10994 |
| Datensatznummer |
250010170
|
| Publikation (Nr.) |
 copernicus.org/acp-11-10975-2011.pdf |
|
|
|
|
|
| Zusammenfassung |
| On a research flight on 10 July 2008, the German research aircraft
Falcon sampled an air mass with unusually high carbon monoxide (CO),
peroxyacetyl nitrate (PAN) and water vapour (H2O) mixing ratios
in the Arctic lowermost stratosphere. The air mass was encountered
twice at an altitude of 11.3 km, ~800 m above the dynamical
tropopause. In-situ measurements of ozone, NO, and NOy
indicate that this layer was a mixed air mass containing both air
from the troposphere and stratosphere. Backward trajectory and
Lagrangian particle dispersion model analysis suggest that the
Falcon sampled the top of a polluted air mass originating from the
coastal regions of East Asia. The anthropogenic pollution plume
experienced strong up-lift in a warm conveyor belt (WCB) located
over the Russian east-coast. Subsequently the Asian air mass was
transported across the North Pole into the sampling area, elevating
the local tropopause by up to ~3 km. Mixing with surrounding
Arctic stratospheric air most likely took place during the
horizontal transport when the tropospheric streamer was stretched
into long and narrow filaments. The mechanism illustrated in this
study possibly presents an important pathway to transport pollution
into the polar tropopause region. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|