A case study of formation and maintenance of a lower stratospheric cirrus cloud over the tropics
A rare occurrence of stratospheric cirrus at 18.6 km height persisting for about 5 days during 3–7 March 2014 is inferred from the ground-based Mie lidar observations over Gadanki (13.5° N, 79.2° E) and spaceborne observations. Due to the vertical transport by large updrafts on 3 March in the tr...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2015-05-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/33/599/2015/angeo-33-599-2015.pdf |
| Summary: | A rare occurrence of stratospheric cirrus at 18.6 km height persisting for about 5
days during 3–7 March 2014 is inferred from the ground-based Mie lidar
observations over Gadanki (13.5° N, 79.2° E) and
spaceborne observations. Due to the vertical transport by large updrafts on
3 March in the troposphere, triggered by a potential vorticity intrusion,
the water vapour mixing ratio shows an increase around the height of 18.6 km. Relative
humidity with respect to ice is ~ 150%, indicating that the
cirrus cloud may be formed though homogeneous nucleation of sulfuric acid.
The cirrus cloud persists due to the cold anomaly associated with the
presence of a 4-day wave. |
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| ISSN: | 0992-7689 1432-0576 |