 |
| Titel |
Subtropical stratospheric transport barriers seen in SCIAMACHY long term limb NO2 dataset and comparison with the general circulation model EMAC |
| VerfasserIn |
Janis Pukite, Sven Kühl, Steffen Dörner, Patrick Jöckel, Thomas Wagner |
| Konferenz |
EGU General Assembly 2013
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250078422
|
|
|
|
|
|
| Zusammenfassung |
| We investigate the appearance of subtropical stratospheric transport barriers in
the NO2 dataset retrieved from SCanning Imaging Absorption spectroMeter for
Atmospheric CHartographY (SCIAMACHY) measurements. SCIAMACHY on ENVISAT
probed the atmosphere at the day side of Earth in alternating sequences of nadir and
limb measurements from 2002 to April 2012. The retrieval of horizontally resolved
vertical profiles of stratospheric trace gases was performed by Differential Optical
Absorption Spectroscopy (DOAS) followed by a tomographic inversion approach which
minimizes errors caused by the horizontal inhomogeneity especially around transport
barriers.
We investigate the seasonal, multiannual (QBO), altitudinal and longitudinal variability of
the location and strength of the barriers and compare them with the barriers determined from
the atmospheric general circulation model EMAC data of NO2 and long lived proxies (N2O,
CH4, H2O) often used for the transport barrier detection. Also a comparison with
measurements performed by other satellite instruments is shown. Due to the correlation of the
NO2 concentration to those of the long lived species N2O, the barriers can be well identified
also from NO2 distributions. |
|
|
|
|
|
|