Lainer, Martin Lorenz Maximilian; Hocke, Klemens; Eckert, Ellen; Kämpfer, Niklaus (2018). Significant decline of mesospheric water vapor at the NDACC site Bern in the period 2007 to 2018. Atmospheric chemistry and physics Discussions, pp. 1-16. European Geosciences Union 10.5194/acp-2018-711
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The middle atmospheric water vapor radiometer MIAWARA is located close to Bern in Zimmerwald (46.88°N, 7.46°E, 907m) and is part of the Network for the Detection of Atmospheric Composition Change (NDACC). Initially built in the year 2002, a major upgrade of the instruments spectrometer allowed to continuously measure middle atmospheric water vapor since April 2007. Thenceforward to Mai 2018, a time series of more than 11 years has been gathered, that makes a first trend estimate possible. For the trend estimation, a robust multi-linear parametric trend model has been used. The trend model encompasses a linear term, a solar activity tracker, the El Niño–Southern Oscillation (ENSO) index, the quasi-biennial oscillation (QBO) as well as the annual and semi-annual oscillation. In the time period April 2007 to Mai 2018 we find a significant decline in water vapor by −0.6±0.2ppmdecade−1 between 61 and 72km. Below the stratopause level (~48km) a smaller reduction of H2O of up to −0.3±0.1ppmdecade−1 is detected.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Institute of Applied Physics 08 Faculty of Science > Institute of Applied Physics > Microwaves |
UniBE Contributor: |
Lainer, Martin Lorenz Maximilian, Hocke, Klemens, Kämpfer, Niklaus |
Subjects: |
600 Technology > 620 Engineering |
ISSN: |
1680-7375 |
Publisher: |
European Geosciences Union |
Language: |
English |
Submitter: |
Simone Corry |
Date Deposited: |
22 Oct 2018 10:58 |
Last Modified: |
05 Dec 2022 15:18 |
Publisher DOI: |
10.5194/acp-2018-711 |
BORIS DOI: |
10.7892/boris.120070 |
URI: |
https://boris.unibe.ch/id/eprint/120070 |
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