Articles | Volume 16, issue 5
https://doi.org/10.5194/acp-16-3265-2016
https://doi.org/10.5194/acp-16-3265-2016
Research article
 | 
11 Mar 2016
Research article |  | 11 Mar 2016

Upper tropospheric water vapour variability at high latitudes – Part 1: Influence of the annular modes

Christopher E. Sioris, Jason Zou, David A. Plummer, Chris D. Boone, C. Thomas McElroy, Patrick E. Sheese, Omid Moeini, and Peter F. Bernath

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Short summary
The AM (annular mode) is the most important internal mode of climatic variability at high latitudes. Upper tropospheric water vapour (UTWV) at high latitudes increases by up to ~ 50 % during the negative phase of the AMs. The response of water vapour to the AMs vanishes above the tropopause. The ultimate goal of the study was to improve UTWV trend uncertainties by explaining shorter-term variability, and this was achieved by accounting for the AM-related response in a multiple linear regression.
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