Greenhouse gas effects on the solar cycle response of water vapour and noctilucent clouds

Vellalassery, Ashique; Baumgarten, Gerd; Grygalashvyly, Mykhaylo; Lübken, Franz-Josef

doi:https://doi.org/10.5194/angeo-41-289-2023

Articles | Volume 41, issue 2

https://doi.org/10.5194/angeo-41-289-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Special issue on the joint 20th International EISCAT Symposium...

https://doi.org/10.5194/angeo-41-289-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 41, issue 2

Regular paper

|

24 Jul 2023

Regular paper |

| 24 Jul 2023

Greenhouse gas effects on the solar cycle response of water vapour and noctilucent clouds

Ashique Vellalassery, Gerd Baumgarten, Mykhaylo Grygalashvyly, and Franz-Josef Lübken

Data sets

Greenhouse gas effects on the solar cycle response of water vapour and noctilucent clouds Ashique Vellalassery, Gerd Baumgarten, Mykhaylo Grygalashvyly, and Franz-Josef Lübken https://doi.org/10.22000/1068

Composite Solar Lyman-alpha J. Machol, D. Woodraska, and T. Woods https://doi.org/10.25980/ZR1T-6Y72

Short summary

The solar cycle affects the H₂O concentration in the upper mesosphere mainly in two ways: directly through photolysis and, at the time and place of NLC formation, indirectly through temperature changes. The H₂O–Lyman-α response is modified by NLC formation, resulting in a positive response at the ice formation region (due to the temperature change effect on the ice formation rate) and a negative response at the sublimation zone (due to the photolysis effect).