Impact of different ozone sounding networks on a 4D-Var stratospheric data assimilation system
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| Title: | Main Title: Impact of different ozone sounding networks on a 4D-Var stratospheric data assimilation system |
| Description: | 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: | 10.1002/qj.2086 (DOI) |
Responsible Party
| Creators: | Frank Baier (Author), Thilo Erbertseder (Author), Hendrik Elbern (Author), Jörg Schwinger (Author) |
| Publisher: | Royal Meteorological Society |
| Publication Year: | 2013 |
Topic
| TR32 Topic: | Atmosphere |
| Related Subproject: | D3 |
| Subjects: | Keywords: Polar Stratospheric Ozone, Data Assimilation, Satellite Data |
File Details
| Filename: | 2012_Baier_QJRMS.pdf |
| Data Type: | Text - Article |
| Size: | 13 Pages |
| File Size: | 481 KB |
| Dates: | Accepted: 01.11.2012 Available: 02.01.2013 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Only Project Members |
| General Access and Use Conditions: | For internal use only |
| Access Limitations: | For internal use only |
| Licence: | [TR32DB] Data policy agreement |
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Specific Information - Publication
| Publication Status: | Published |
| Review Status: | Peer reviewed |
| Publication Type: | Article |
| Article Type: | Journal |
| Source: | Quarterly Journal of the Royal Meteorological Society |
| Volume: | 139 |
| Number of Pages: | 13 (1 - 13) |
Metadata Details
| Metadata Creator: | Hendrik Elbern |
| Metadata Created: | 03.12.2013 |
| Metadata Last Updated: | 03.12.2013 |
| Subproject: | D3 |
| Funding Phase: | 2 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Page Visits: | 915 |
| Metadata Downloads: | 0 |
| Dataset Downloads: | 2 |
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