Articles | Volume 20, issue 20
Atmos. Chem. Phys., 20, 12153–12161, 2020
Atmos. Chem. Phys., 20, 12153–12161, 2020
Research article
27 Oct 2020
Research article | 27 Oct 2020

Influence of convection on stratospheric water vapor in the North American monsoon region

Wandi Yu et al.

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Cited articles

Anderson, J. G., Wilmouth, D. M., Smith, J. B., and Sayres, D. S.: UV dosage levels in summer: Increased risk of ozone loss from convectively injected water vapor, Science, 337, 835–839,, 2012. a
Bergman, J. W., Jensen, E. J., Pfister, L., and Yang, Q.: Seasonal differences of vertical-transport efficiency in the tropical tropopause layer: On the interplay between tropical deep convection, large-scale vertical ascent, and horizontal circulations, J. Geophys. Res.-Atmos., 117, D05302,, 2012. a
Bergman, J. W., Fierli, F., Jensen, E. J., Honomichl, S., and Pan, L. L.: Boundary layer sources for the Asian anticyclone: Regional contributions to a vertical conduit, J. Geophys. Res.-Atmos., 118, 2560–2575,, 2013. a
Bowman, K. P.: Large-Scale Isentropic Mixing Properties of the Antarctic Polar Vortex from Analyzed Winds, J. Geophys. Res.-Atmos., 98, 23013–23027,, 1993. a
Bowman, K. P. and Carrie, G. D.: The mean-meridional transport circulation of the troposphere in an idealized GCM, J. Atmos. Sci., 59, 1502–1514,<1502:Tmmtco>2.0.Co;2, 2002. a
Short summary
The stratospheric water vapor mixing ratio over North America (NA) region is up to ~ 1 ppmv higher when deep convection occurs. We find substantial consistency in the interannual variations of NA water vapor anomaly and deep convection and explain both the summer seasonal cycle and interannual variability of the convective moistening efficiency. We show that the NA anticyclone and tropical upper tropospheric temperature determine how much deep convection moistens the lower stratosphere.
Final-revised paper