Marine Environment Monitoring and Assessment National database (MERMAN)
Assessments and data access
The MERMAN data were most recently assessed and reported in
- Charting Progress 2: The state of UK seas
- Oslo and Paris Convention (OSPAR) Quality Status Report 2010
Annual assessments are also made in OSPAR Co-ordinated Environmental Monitoring Programme (CEMP).
- First select the media, measurement type and measurement from the drop-down lists presented at the upper left of the screen. Once selected, coloured symbols for each station will be displayed on the map.
- To zoom to a geographic region of interest — select a 'region' from the drop-down lists presented to the left of the screen.
- To view further information about a station and to gain access to the data plots — click on a coloured symbol within the map.
- To display the data plots — follow the links under the 'Graphics' section to the right of the screen.
Assessments of the potential impact of individual chemicals use an environmental quality standard (EQS), derived from the concentration at which laboratory data suggest that the chemical could be harmful. Most of these standards are for water. For sediments and biota, we have data on background assessment concentrations (BACs) and environmental assessment criteria (EACs), the latter based on toxicological information and which often also add a margin of safety to give a very conservative estimate of potential harm.
Alternative approaches involve combining modelling, laboratory and field toxicity data to generate a range of concentrations within which potential effects may occur. For example, Effects Range-Low (ERL) and Effects Range-Median (ERM) concentrations. This approach, first developed for the United States Environmental Protection Agency, is now widely used around the world.
Before MERMAN data can be provided, a data supply agreement must be completed and returned to BODC.
Related MERMAN pages at BODC
|Project overview||Other links|
|BODC's role||Assessment tool|
|Partnerships||Data supply agreement|
Related external links
|Charting Progress 2: The state of UK seas||Co-ordinated Environmental Monitoring Programme (CEMP)|
|OSPAR Quality Status Report 2010||EMODnet chemistry portal|