On seasonality of stratomesospheric CO above midlatitudes: new insight from solar FTIR spectrometry at Zugspitze and Garmisch
- A significant seasonality in stratomesospheric CO (24–100 km) above mid-latitudes is derived from FTIR via a new regularization scheme. Half hourly means from the Zugspitze (47.42°N, 10.98°E, 2964 m a.s.l.) and nearby Garmisch (745 m a.s.l.) measurements show excellent agreement (R = 0.94, slope 0.91, standard deviation 12%). Mean seasonality of the Zugspitze series (1999–2008) shows a November–April enhancement (February maximum 3.63 × 1016 cm−2) and a summer background (1.64 × 1016 cm−2) which agrees with the WACCM model. Measured monthly means reveal a year-to-year variability of up to 32% (1-sigma) in winter not reproduced by WACCM (R = −0.13). Frequency distributions of daily means are right skewed in winter due to enhancements by vortex air transport (1–3 days duration) which typically reflect CO levels of the vortex border and may even reach vortex-center levels (≈300% of the multi-annual monthly median).
| Author: | Tobias Borsdorff, Ralf SussmannORCiDGND |
|---|---|
| Frontdoor URL | https://opus.bibliothek.uni-augsburg.de/opus4/120740 |
| ISSN: | 0094-8276OPAC |
| ISSN: | 1944-8007OPAC |
| Parent Title (English): | Geophysical Research Letters: Atmospheric Science |
| Publisher: | Wiley |
| Place of publication: | Hoboken, NJ |
| Type: | Article |
| Language: | English |
| Year of first Publication: | 2009 |
| Release Date: | 2025/03/31 |
| Volume: | 36 |
| Issue: | 21 |
| First Page: | L21804 |
| DOI: | https://doi.org/10.1029/2009gl040056 |
| Institutes: | Fakultät für Angewandte Informatik |
| Fakultät für Angewandte Informatik / Institut für Geographie | |
| Fakultät für Angewandte Informatik / Institut für Geographie / Lehrstuhl für Physische Geographie mit Schwerpunkt Klimaforschung | |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften |
