Effect of deep convection on the tropical tropopause layer composition over the southwest Indian Ocean during austral summer

Evan, Stephanie; Brioude, Jerome; Rosenlof, Karen; Davis, Sean M.; Vömel, Holger; Héron, Damien; Posny, Françoise; Metzger, Jean-Marc; Duflot, Valentin; Payen, Guillaume; Vérèmes, Hélène; Keckhut, Philippe; Cammas, Jean-Pierre

doi:https://doi.org/10.5194/acp-20-10565-2020

Articles | Volume 20, issue 17

https://doi.org/10.5194/acp-20-10565-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-20-10565-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 17

Research article

|

10 Sep 2020

Research article |

| 10 Sep 2020

Effect of deep convection on the tropical tropopause layer composition over the southwest Indian Ocean during austral summer

Stephanie Evan, Jerome Brioude, Karen Rosenlof, Sean M. Davis, Holger Vömel, Damien Héron, Françoise Posny, Jean-Marc Metzger, Valentin Duflot, Guillaume Payen, Hélène Vérèmes, Philippe Keckhut, and Jean-Pierre Cammas

Data sets

MLS/Aura Level 2 Water Vapor (H2O) Mixing Ratio V004 A. Lambert, W. Read, and N. Livesey https://doi.org/10.5067/Aura/MLS/DATA2009

CALIPSO Lidar Level 1B profile data, V4-10 C. Trepte https://opendap.larc.nasa.gov/opendap/CALIPSO/LID_L1-Standard-V4-10/contents.html

DACC/SHADOZ La Reunion F. Posny https://tropo.gsfc.nasa.gov/shadoz/Reunion.html

Stratospheric Water and OzOne Satellite Homogenized (SWOOSH) data set S. Davis https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.ncdc:C00958

Short summary

The role of deep convection in the southwest Indian Ocean (the 3rd most active tropical cyclone basin) on the composition of the tropical tropopause layer (TTL) and the climate system is less understood due to scarce observations. Balloon-borne lidar and satellite measurements in the southwest Indian Ocean were used to study tropical cyclones' influence on TTL composition. This study compares the impact of a tropical storm and cyclone on the humidification of the TTL over the SW Indian Ocean.