On-demand web plotting of observation monitoring statistics
Représentation graphique à la demande sur le web des statistiques de suivi des observations
Dahoui, Mohamed ; Sahin, Cihan
Observation monitoring provides detailed statistical information on the quality and availability of the different components of the observing system monitored and used by ECMWF. The monitoring results are primarily produced to help improve the usage of observations within ECMWF's data assimilation system, which provides the initial conditions for forecasts. They are also used to provide feedback to observation data providers. Additionally, published observation monitoring statistics enable comparisons with results from other numerical weather prediction (NWP) centres and help identify the sources of differences between observations and the reference weather forecasting model. ECMWF makes a comprehensive set of observation monitoring statistics publicly available, covering almost all observations processed by ECMWF's data assimilation system (https://www.ecmwf.int/en/forecasts/quality-our-forecasts/monitoring-observing-system). This is also part of ECMWF's support for observation-related activities of the World Meteorological Organization (WMO). The monitoring website includes thousands of up-to-date products (time series, geographical maps, etc.), which are pre-plotted routinely (daily/weekly) and uploaded to the web. Unlike the regular access to forecast products, the access pattern to monitoring statistics is not regular and depends on each dataset and the interest of the user community. The objective of the work presented here is to replace the current framework with an on-demand system, enabling users to visualise statistics on the fly without the need to systematically pre-generate thousands of plots. Combined with an efficient caching system, the new framework will help optimise resources and will enable products to be refreshed more frequently. It will also offer more possibilities to access and inter-compare monitoring statistics.</p>
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