Articles | Volume 23, issue 7
Research article
05 Apr 2023
Research article |  | 05 Apr 2023

Aircraft observations of gravity wave activity and turbulence in the tropical tropopause layer: prevalence, influence on cirrus clouds, and comparison with global storm-resolving models

Rachel Atlas and Christopher S. Bretherton

Data sets

The Cirrus Guide II In-situ Aircraft Data Set M. Krämer, C. Rolf, and N. Spelten

NCEP/CPC L3 Half Hourly 4km Global (60S - 60N) Merged IR V1 J. Janowiak, B. Joyce, and P. Xie

Short summary
The tropical tropopause layer exists between the troposphere and the stratosphere in the tropics. Very thin cirrus clouds cool Earth's surface by scrubbing water vapor (a greenhouse gas) out of air parcels as they ascend through the tropical tropopause layer on their way to the stratosphere. We show observational evidence from aircraft that small-scale (< 100 km) gravity waves and turbulence increase the amount of ice in these clouds and may allow them to remove more water vapor from the air.
Final-revised paper