Highlights Long-range transport of SO 2 pollution from emissions in SE Asia investigated Two important air mass pathways studied: - Uplift of emissions.

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Presentation transcript:

Highlights Long-range transport of SO 2 pollution from emissions in SE Asia investigated Two important air mass pathways studied: - Uplift of emissions by Warm Conveyor Belts (WCBs) associated with low pressure systems and advection by the jet steam - Uplift by emissions by deep convection and transport by Asian Summer monsoon anticyclone in the upper troposphere WCB process may represent a significant source of SO 2 to the UTLS (0.02 Mt S/a ~ SO 2 input by air traffic) Sulfate aerosols are formed in the WCB plumes and ASM anticyclone (represent surface area for heterogeneous chemical reactions and may impact cirrus properties) Composites of SO 2 measurements from 10 years aircraft data produced. Large-scale impact of East-Asian SO 2 emissions – results from recent aircraft observations >SchlagerDLR.de Chart 1 Hans Schlager, DLR-Institute of Atmospheric Physics, Germany 17 th GEIA Conference, Beijing, Nov. 2015

Major long-range transport pathways of Asian emissions in the UTLS investigated during recent campaigns > SchlagerDLR.de Chart 2 Asia INTEX-ITOP POLARCAT ESMVALOMO GW-LCYCLE LRT of East-Asian emissions, initiated by WCB uplift events, into central Europe (INTEX-ITOP, HALO) and the Europen Arctic (POLARCAT, GW-LCYCLE LRT of South-East Asian emissions, initiated by deep convection, due to Asian Summer Monsoon dynamics (ESMVal, OMO)

Distribution of emissions from SE Asia after uplift by WCB and convection in ASM region SchlagerDLR.de Chart 3 MLS CO (JJA) & Air parcel locations from SE Asia after 20 days (Garney & Randel, 2015) SO 2 distribution after WCB uplift event in SE Asia (Flexpart sim.)

LRT initiated by WCB air mass uplift - Relative frequencies (%) of WCB trajectories in DJF (Madonna et al. 2014) -2 days 0 days +4 days +6 days

Detection of SO 2 plumes in the UTLS over Scandinavia originating from South-East Asian pollution sources

Measurements in the upper troposphere (12-15 km) in the Asian Summer Monsoon Anticlyclone

Detection of enhanced SO 2 and CN in the Asian Summer Monsoon Anticyclone SchlagerDLR.de Chart 7

SO 2 Composites (8 – 12 km, 5°X 5°Bins) DC3INTEX GW-LCYCLE ACCESS TROCCINOX ESMVal DeepWave SCOUT-O3 DeepWave

Major upcoming aircraft field campaigns in > Lecture > Author Document > DateDLR.de Chart 9 DACCIWA 2016 (Togo): Pollution – cloud interaction in Westafrika STRATOCLIM 2016 (SE Asia): Pollution and Asian Summer Monsoon EMERGE-EU 2017 (Europe): Regional impact of megacities EMERGE-Asia 2018 (tbd): Regional impact of megacities GeophysicaHALO G-VDLR Falcon

References > Lecture > Author Document > DateDLR.de Chart 10 Fiedler, V., R. Nau, S. Ludmann, F. Arnold, H. Schlager, and A. Stohl (2009), East Asian SO2 pollution plume over Europe, Part 1: Airborne trace gas measurements and source identification by particle dispersion model simulations, Atmos. Chem. Phys., 9(14), Fiedler, V., Arnold, F., Schlager, H., Dörnbrack, A., Pirjola, L., Stohl, A., 2009, East Asian SO2 pollution plume over Europe - Part 2: Evolution and potential impact, Atmos. Chem. Phys., 9 (14), Madonna, E., H. Wernli, H. Joos, and O. Martius (2013), Warm Conveyor Belts in the ERA-Interim Dataset (1979–2010). Part I: Climatology and Potential Vorticity Evolution, Journal of Climate, 27(1), Roiger, A., et al. (2011), In-situ observation of Asian pollution transported into the Arctic lowermost stratosphere, Atmos. Chem. Phys., 11(21), Speidel, M., R. Nau, F. Arnold, H. Schlager, and A. Stohl (2007), Sulfur dioxide measurements in the lower, middle and upper troposphere: Deployment of an aircraft-based chemical Ionization mass spectrometer with permanent in-flight calibration, Atmospheric Environment, 41(11),