Massimo A. Bollasina and Collaborators

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Presentation transcript:

Understanding the large-scale atmospheric dynamical response to changes in anthropogenic aerosols Massimo A. Bollasina and Collaborators massimo.bollasina@ed.ac.uk School of GeoSciences, University of Edinburgh Tri-MIP-athlon - Reading, 11 June 2018

The aerosol-monsoon coupled system Anthropogenic aerosols: an integral component of the monsoon system over a range of time scales Atmospheric circulation: a major contributor to internal climate variability and its uncertain role in climate change Complex large-scale aerosol-precipitation-circulation mechanisms The emerging interest in decadal climate prediction highlights the importance of understanding the mechanisms of decadal to interdecadal climate variability

Can we identify common patterns of change in the Global Monsoon? Bollasina et al., 2018 (in prep.)

Changes in the Global Monsoon Area (GMA) SULx5 SULx5 BCx10 + -

The opposing effects of SU & BC MJJAS Precipitation (mm/day)

Contrasting SU and BC circulation changes SLP (hPa) & 850-hPa winds (m/s)

MJJAS Moisture fluxes and convergence (mm/day)

Linking regional changes to the overturning circulation 200-hPa Velocity potential & Divergent circulation

Concluding remarks A better understanding of the monsoon response to aerosols is critical Both SU and BC induce large-scale changes in the atmospheric circulation, with direct links with the monsoon system Key to narrowing uncertainties in short-to-medium term climate projections