Bremen 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
UP: Fachverband Umweltphysik
UP 10: Atmosphäre - Spurengase (Fortsetzung)
UP 10.9: Vortrag
Donnerstag, 16. März 2017, 11:30–11:45, GW2 B3009
Do recent observed stratospheric ozone trends indicate ozone recovery? — •Mark Weber1, Wolfgang Steinbrecht2, Stacey Frith3, Nabiz Rahpoe1, Melanie Coldewey-Egbers4, Doug Degenstein5, and Lucien Froidevaux6 — 1Universität Bremen FB1, Bremen, Germany — 2Deutscher Wetterdienst, Hohenpeissenberg, Germany — 3NASA Goddard Space Flight Center, Grenbelt, MD, USA — 4DLR Oberpfaffenhofen, Wessling, Germany — 5University of Sasketchewan, Saskatoon, Canada — 6Jet Propulsion Laboratory, Pasadena, CA, USA
Due to the successful phase-out of ozone-depleting substances (ODS) following the Montreal Protocol, ozone is supposed to slowly recover. As the stratospheric halogen (resulting from ODS) is decreasing at a slow rate (as compared to the rate of increase before the 1990s), ozone recovery will be quite slow. Due to the large year-to-year variability in ozone, ODS related trends are thus difficult to establish. So far positive ozone trends since 2000 were only statistically significant in the upper stratosphere according to the recent WMO ozone assessment. In addition to the high variability in ozone, potential instrumental drifts of satellite data add to trend uncertainties. In this presentation actual ozone trends are reported using available and updated total ozone and ozone profile satellite data. Attribution of the observed trends and uncertainties due to long-term stability of the satellite data will be discussed.