Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 48, Issue 4, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2020GL091471
Keywords
cirrus; convection; tropical tropopause; water vapor
Categories
Funding
- National Science Foundation (NSF) [AGS-1743753]
Ask authors/readers for more resources
A recent study found that convective ice flux near the tropical tropopause plays a crucial role in moisture transport, but due to challenging observation conditions and computational limitations, the quantification of these storms' effects remains limited.
In the tropics, the tropopause is exceptionally cold and air entering the stratosphere is dehydrated down to a few parts per million leading to the extreme dryness of Earth's stratosphere. Deep convection typically detrains a few kilometers below the tropopause, but the few storms that may reach up to the tropopause could have an outsize effect on water vapor, other chemically important trace species, and clouds. However, little progress has been made to quantify the role of these storms due to challenging conditions for observations, and computational limitations. Here we provide the first global observational estimate of the convective ice flux at near tropical tropopause levels by using spaceborne lidar measurements and pioneering a method to convert from lidar measurement to ice flux information. Our estimate indicates that the upward ice flux in deep convection dominates moisture transport almost all the way up to the cold point tropopause.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available