POPs GMP data visualization and analysis
 

Ambient air data in GMP reports

The studied GMP reports include records from both active and passive air sampling, with all consequences for data quality and content. Passive sampling provides concentration estimates that are directly aggregated in time and, therefore, the variance behind point estimates is significantly different from outcomes of active sampling.

Fig. 1. Geographical coverage of GMP1 reported data from ambient air active sampling stratified according to number of reported parameters

Fig. 1. Geographical coverage of GMP1 reported data from ambient air active sampling stratified according to number of reported parameters

Fig. 2. Geographical coverage of GMP1 reported data from ambient air passive sampling stratified according to number of reported parameters

Fig. 2. Geographical coverage of GMP1 reported data from ambient air passive sampling stratified according to number of reported parameters

Concentration data on 71 parameters were published in the GMP reports for active air sampling. The list of measured parameters covers 47% of all parameters specified in the Guidance on Global Monitoring Plan for POPs (2007). All of the original 12 POPs in the Stockholm Convention are fully covered by active air monitoring data. Moreover, some chemicals of the additional 10 POPs were already reported. In total, active air sampling data were reported for 4 UN regions in 31 countries and subregions (not found in the African regional report).

DDT isomers, dieldrin, cis-chlordane, heptachlor and HCB were the most frequently reported chemicals, however the set of chemicals is strongly region-specific and therefore spatial comparison of parameters among regions is often impossible. Large fraction of reported data from active air sampling are long-term series (four years or more) and are suitable for establishment of the long-term trends.

Data from the passive air monitoring programmes are available in all GMP reports. The overall number of reported parameters is 37; 19 out of those parameters were for the group of congeners, isomers and degradation products recommended for monitoring in the Guidance document on GMP (2007). In addition, eight chemicals out of the 10 new POPs group were also reported. Passive air monitoring data were reported from all UN regions in 56 countries.

PCBs, DDTs, HCB and chlordane were the most frequently reported chemicals. The only site with at least 4 years of data available for establishment of the long-term trends is Košetice, Czech Republic.

 

Last update: 18 January 2013