Articles | Volume 17, issue 9
Atmos. Chem. Phys., 17, 5537–5559, 2017
https://doi.org/10.5194/acp-17-5537-2017

Special issue: The SPARC Reanalysis Intercomparison Project (S-RIP) (ACP/ESSD...

Atmos. Chem. Phys., 17, 5537–5559, 2017
https://doi.org/10.5194/acp-17-5537-2017

Research article 03 May 2017

Research article | 03 May 2017

Global large-scale stratosphere–troposphere exchange in modern reanalyses

Alexander C. Boothe and Cameron R. Homeyer

Data sets

ERA-Interim Project European Centre for Medium-Range Weather Forecasts (ECMWF) https://doi.org/10.5065/D6CR5RD9

JRA-55: Japanese 55-year Reanalysis, Daily 3-Hourly and 6-Hourly Data Japan Meteorological Agency (JMA) https://doi.org/10.5065/D6HH6H41

inst6_3d_ana_Nv: MERRA 3D Analyzed State, Meteorology Instantaneous 6-hourly V5.2.0 Global Modeling and Assimilation Office (GMAO) https://doi.org/10.5067/WGY2HAX25374

MERRA-2 inst6_3d_ana_Nv: 3d, 6-Hourly, Instantaneous, Model-Level, Analysis, Analyzed Meteorological Fields V5.12.4 Global Modeling and Assimilation Office (GMAO) https://doi.org/10.5067/IUUF4WB9FT4W

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Short summary
We examine global atmospheric transport that impacts chemistry and climate. In particular, we compare exchanges of troposphere and stratosphere air from large-scale processes as depicted from multiple modern reanalysis models (those intending to provide "best guesses" of the global atmospheric state at a given point in time). We find that transport varies considerably amongst the reanalyses and is sensitive to the choice of troposphere–stratosphere boundary.
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