Articles | Volume 21, issue 4
Research article
24 Feb 2021
Research article |  | 24 Feb 2021

Global modeling studies of composition and decadal trends of the Asian Tropopause Aerosol Layer

Adriana Bossolasco, Fabrice Jegou, Pasquale Sellitto, Gwenaël Berthet, Corinna Kloss, and Bernard Legras

Data sets

Modern-Era Retrospective analysis for Research and Applications, Version 2 (MERRA2) NCAR/UCAR and Climate and Global Dynamics Division

Emissions from CEDS for CMIP6 J.-F. Lamarque and L. K. Emmons

Atmospheric Chemistry Experiment SciSat Level 2 Processed Data, v4.0 P. F. Bernath, J. Steffen, J. Crouse, and C. D. Boone

Version 4.2x Level 2 and 3 data quality and description document N. J. Livesey, W. G. Read, P. A. Wagner, L. Froidevaux, A. Lambert, G. L. Manney, L. F. Millan Valle, H. C. Pumphrey, M. L. Santee, M. J. Schwartz, S. Wang, R. A. Fuller, R. F. Jarnot, B. W. Knosp, E. Martinez, and R. R. Lay

Model code and software

CESM (The Community Earth System Model) NCAR

Short summary
Using the Community Earth System Model, we simulate the surface aerosols lifted to the Asian tropopause (the ATAL layer), its composition and trend, covering a long-term period (2000–2015). We identify a double-peak aerosol vertical profile that we attribute to dry and convective cloud-borne aerosols. We find that natural aerosol (mineral dust) is the dominant aerosol type and has no long-term trend. ATAL's anthropogenic fraction, by contrast, shows a marked positive trend.
Final-revised paper