Articles | Volume 18, issue 22
https://doi.org/10.5194/acp-18-16213-2018
https://doi.org/10.5194/acp-18-16213-2018
Research article
 | 
15 Nov 2018
Research article |  | 15 Nov 2018

Global IWV trends and variability in atmospheric reanalyses and GPS observations

Ana C. Parracho, Olivier Bock, and Sophie Bastin

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Cited articles

Bauer, P.: 4D-Var assimilation of MERIS total column water-vapour retrievals over land, Q. J. Roy. Meteor. Soc., 135, 1852–1862, https://doi.org/10.1002/qj.509, 2009. 
Bock, O.: GPS data: Daily and monthly reprocessed IWV data from 120 global GPS stations, version 1.2, https://doi.org/10.14768/06337394-73a9-407c-9997-0e380dac5591, 2016. 
Bock, O., Keil, C., Richard, E., Flamant, C., and Bouin, M. N.: Validation of precipitable water from ECMWF model analyses with GPS and radiosonde data during the MAP SOP, Q. J. Roy. Meteor. Soc., 131, 3013–3036, 2005. 
Bock, O., Bouin, M. N., Walpersdorf, A., Lafore, J. P., Janicot, S., and Guichard, F.: Comparison of GPS precipitable water vapour to independent observations and Numerical Weather Prediction model reanalyses over Africa, Q. J. Roy. Meteor. Soc., 133, 2011–2027, https://doi.org/10.1002/qj.185, 2007. 
Bock, O., Willis, P., Wang, J., and Mears, C.: A high-quality, homogenized, global, long-term (1993–2008) DORIS precipitable water data set for climate monitoring and model verification, J. Geophys. Res.-Atmos., 119, 7209–7230, https://doi.org/10.1002/2013JD021124, 2014. 
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Short summary
Integrated water vapour from GPS observations and two modern atmospheric reanalyses were compared for 1995–2010. Means, variability and trend signs were in general good agreement. Regions and GPS stations with poor agreement were investigated further. Representativeness issues, uncertainties in reanalyses, and inhomogeneities in GPS were evidenced. Reanalyses were compared for an extended period, and a focus on north Africa and Australia highlighted the impact of dynamics on water vapour trends.
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