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Verification of Global Services
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MACC uses a multitude of independent data sets to verify its global services. Both the near-real-time forecasts and the reanalysis are carefully monitored to provide clear indications of the quality of these products. This page provides an overview of the current means of verification; please click on any image to access the full range of plots.
| The aerosol analysis/forecasting system is being verified operationally against AERONET observations. The aerosol verification plots show comparisons of aerosol optical depth (AOD) values from the MACC analysis compared to the various AERONET station observations. The verification plots also show the individual aerosol types as modelled by the MACC system. This allows constant monitoring of the quality of the MACC aerosol analysis/forecasting system. |
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| Surface ozone and carbon monoxide from the near-real-time analysis/forecast system are routinely verified against data from some of the WMO GAW stations. |
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| Tropospheric NO2 and HCHO columns as well as stratospheric NO2 from the near-real-time forecasting/analysis systems (IFS-MOZART and IFS-TM5) and the MACC reanalysis are being verified operationally against independent SCIAMACHY satellite retrievals. The verification plots include comparison of monthly averages as maps and comparison of time series over selected regions. This allows constant monitoring of the MACC forecasting/analysis system. |
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| This service provides evaluation of MACC simulations against MOPITT CO data and surface CO and O3 observations from EMEP and NOAA-GMD. |
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The integrated stratospheric ozone web service provides qualitative and quantitative verification of the NRT and historic MACC global atmospheric composition. The MACC analysis is currently verified in near-real time against BASCOE, SACADA and TM3DAM models. Additionally, the website provides information on the development of the latest A(nta)rctic ozone hole.
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| O3 and CO from the MACC reanalyses are validated with profiles from MOZAIC/IAGOS aircraft for the period 2003-2006. Time-series of the difference between model and observations are presented for each available year, along with profiles at individual airports, and the observed climatologies. NRT monitoring will be provided by MOZAIC/IAGOS in a similar fashion. |
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The usage of satellite data in the reanalysis is carefully monitored to detect any problems. Departure monitoring plots provide a statistical measure of the differences between the observations and the model before and after assimilation.
Increment monitoring plots show the changes for each variable for every 12-hour assimilation due to the assimilation of observations.
A full explanation of the plots is given here.
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