Interannual variability of temperature in the UTLS region over  Ganges–Brahmaputra–Meghna river basin based on COSMIC GNSS RO  data

Khandu,; Awange, Joseph L.; Forootan, Ehsan

doi:https://doi.org/10.5194/amt-9-1685-2016

Articles | Volume 9, issue 4

https://doi.org/10.5194/amt-9-1685-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

Limb observations of the middle atmosphere by space- and airborne...

https://doi.org/10.5194/amt-9-1685-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 9, issue 4

Research article

|

15 Apr 2016

Research article |

| 15 Apr 2016

Interannual variability of temperature in the UTLS region over Ganges–Brahmaputra–Meghna river basin based on COSMIC GNSS RO data

Khandu, Joseph L. Awange, and Ehsan Forootan

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Final revised paper (published on 15 Apr 2016)
Supplement to the final revised paper
Preprint (discussion started on 14 Sep 2015)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC C3248: 'Review', Anonymous Referee #1, 12 Oct 2015
- AC C4235: 'Responding to the comments and suggestions', Khandu Khandu, 07 Dec 2015
RC C3501: 'Review of "Interannual variability of upper tropospheric..." by Khandu et al.', Anonymous Referee #2, 25 Oct 2015
- AC C4237: 'Response to Anonymous Reviewer 2', Khandu Khandu, 07 Dec 2015

Short summary

Monthly accumulated COSMIC RO data is used to examine the interannual variability of UTLS temperature over the Ganges-Brahmaputra-Meghna river basin from 2006 to 2013. PCA analysis of tropopause temperatures and heights indicates that ENSO accounts for 73% of the interannual variability with a correlation of 0.77 with Niño3.4 index whereas the QBO explains about 10% of the variability. The tropopause temperature (height) increased (decreased) by about 1.5oC (300 m) during the 2009/2010 El Niño.