92nd American Meteorological Society Annual Meeting (January 22-26, 2012)

Thursday, 26 January 2012: 2:15 PM
First Detection of East Asian Pollution Import Into the Lowermost Stratosphere by Warm Conveyor Belt Uplift
Room 342 (New Orleans Convention Center )
Hans Schlager, Deutsches Zentrum für Luft- und Raumfahrt, DLR, Oberpfaffenhofen, Wessling, Germany; and F. Arnold, A. Roiger, H. Aufmhoff, R. Baumann, and T. Sailer

We report on two case studies of anthropogenic pollution transport into the lowermost stratosphere from East Asian source regions. We have made airborne trace gas measurements in pollution plumes encountered above Greenland and Germany during the GRACE and HALO campaigns in 2008 and 2010, respectively. Meteorological analyses and transport model simulations reveal that the measured pollutants were released from ground-based sources in East-China, South-Korea, and Japan. The pollution plumes were uplifted by warm conveyor belts in Asia and the Northern Pacific, respectively, and finally injected into the lowermost stratosphere where they experienced mixing by entrainment of stratospheric air. The stratospheric plumes were characterized by markedly elevated mole fractions of trace gases of tropospheric origin (SO2, H2O, CO2, CO, PAN) and markedly lowered mole fractions of trace gases of preferably stratospheric origin (O3, NOy, HNO3, NO). Implications of the transport pathway presented in this study will be discussed.

Supplementary URL: