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| Titel |
Tropical upper tropospheric humidity variations due to potential vorticity intrusions |
| VerfasserIn |
M. Sandhya, S. Sridharan, M. Indira Devi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 33, no. 9 ; Nr. 33, no. 9 (2015-09-03), S.1081-1089 |
| Datensatznummer |
250121242
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| Publikation (Nr.) |
 copernicus.org/angeo-33-1081-2015.pdf |
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| Zusammenfassung |
| Four cases (March 2009, May 2009, April 2010 and February 2012) are
presented in which the ERA-interim relative humidity (RH) shows consistent
increase by more than 50 % in the upper troposphere (200–250 hPa) over
tropics at the eastward side of the potential vorticity (PV) intrusion
region. The increase in RH is confirmed with the spaceborne microwave limb
sounder observations and radiosonde observations over Gadanki (13.5° N,
79.2° E) and is observed irrespective of whether the PV intrusions are
accompanied by deep convection or not. It is demonstrated that the increase
in RH is due to poleward advection induced by the PV intrusions in their
eastward side at the upper tropospheric heights. It is suggested that the
low-latitude convection, which is not necessarily triggered by the PV
intrusion, might have transported water vapour to the upper tropospheric
heights. |
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