DAQUAMAP Information exchange procedure

 

Approved by the WG members

 

Submitted to the IGP via the CIG 22.04.98

 

What is DAQUAMAP?

DAQUAMAP is an initiative to assess the performance of the routine meteorological surface and upper air stations (GTS and non GTS) in the MAP area. Such an assessment is a prerequisite to improve the quality of the operational observations, as it has been stated in the MAP Design Proposal. In the MAP area far more than 10000 meteorological stations are operated by several dozens of institutions. It cannot be assumed a priori that all stations satisfy the WMO recommendations. Therefore, some variety in measuring and processing procedures as well in quality control efforts can be expected. DAQUAMAP shall compile an overview over the QC procedures used by the different network operators.

In order to assess the performance of meteorological surface stations the error detection and correction module of ‘VERA’ is used (VERA = Vienna enhance resolution analysis; an objective analysis tool operationally used in the Austrian NWS). VERA is semioperational at IMGW since the beginning of 1997. Therefore, a first report containing results for GTS stations can be accomplished until the end of February. After a thorough review of the method and the adaptation of the computer programs, a selection of parameters (sea level pressure, temperature, humidity and if possible, wind and other parameters) for as many stations as possible below 750 m asl covering the time period 1992-1997 will be checked. If there is enough time in DAQUAMAP (in 1998), the available 2D Version of the QC algorithm will be extended to a 3D Version. Then, additional parameters, e.g. unreduced pressure, of all stations including high altitude stations could be checked.

The project is funded for 1997 and 1998 by the members of the EUMETNET optional program ‘MAP-NWS’ and was started in late 1997.

What are the results of DAQUAMAP?

For each station and each analysis step, the error detection and correction module of VERA provides an error estimate. These results can be analyzed in many ways and give hints:

These results will be summarized in tables and time series plots of the error estimates which are considered as suspect by the DAQUAMAP project team.

 

Information exchange between station operators and the DAQUAMAP project team

 

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