[706] - Impact of different ozone sounding networks on a 4D-Var stratospheric data assimilation system

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Baier, F., Erbertseder, T., Elbern, H., Schwinger, J., 2013. Impact of different ozone sounding networks on a 4D-Var stratospheric data assimilation system. Quarterly Journal of the Royal Meteorological Society, 139, 1 - 13. DOI: 10.1002/qj.2086.
Title(s):Main Title: Impact of different ozone sounding networks on a 4D-Var stratospheric data assimilation system
Description(s):Abstract: Observing system simulation experiments (OSSEs) are performed to examine the impact of ozonesonde observations on a data assimilation system during a simulated satellite data gap during February 2003. Using the four-dimensional variational chemical data assimilation systemSACADA,the relative influence of launch rates and station coverage is investigated. Starting with the VINTERSOL/MATCH campaign, different network and sounding configurations are evaluated. To quantify the performance of assimilation experiments in the lower stratosphere, analysis skill and linear pattern correlation with respect toERA-Interim referencedata are assessed for the 20 km altitude level. Using first-guess and analysis minus observation error statistics, a priori error settings are tuned to optimise the assimilation of simulated and real-world ozone soundings. In summary, it is found that, during satellite data gaps, ozonesonde data can have a significant positive impact on the mean analysis skill depending both on the number of observations and the network layout. A better distributed network based on the GAW system, with 28 stations and three soundings bi-weekly, proves clearly superior to VINTERSOL/MATCH, showing a positive gain in skill of 0.26 compared to a free-running model.
Identifier(s):DOI: 10.1002/qj.2086
Responsible Party
Creator(s):Author: Frank Baier
Author: Thilo Erbertseder
Author: Hendrik Elbern
Author: Jörg Schwinger
Publisher:Royal Meteorological Society
TR32 Topic:Atmosphere
Subject(s):CRC/TR32 Keywords: Polar Stratospheric Ozone, Data Assimilation, Satellite Data
File Details
File Name:2012_Baier_QJRMS.pdf
Data Type:Text
Size(s):13 Pages
File Size:481 kB (0.47 MB)
Date(s):Date Accepted: 2012-11-01
Available: 2013-01-02
Mime Type:application/pdf
Data Format:PDF
Download Permission:OnlyTR32
General Access and Use Conditions:For internal use only
Access Limitations:For internal use only
Licence:TR32DB Data policy agreement
North:-no map data
Measurement Region:Other
Measurement Location:--Other--
Specific Informations - Publication
Article Type:Journal
Source:Quarterly Journal of the Royal Meteorological Society
Number Of Pages:13
Page Range:1 - 13
Metadata Details
Metadata Creator:Hendrik Elbern
Metadata Created:2013-12-03
Metadata Last Updated:2013-12-03
Funding Phase:2
Metadata Language:English
Metadata Version:V40
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