CSEMP assessment of mercury in sediment at inner (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 84.21 | 85.41 | -39.11 | 78.21 | | | |
| linear | 2 | 71.92 | 74.20 | -31.96 | 63.92 | 14.296 | 1 | 0.0002 |
| smooth (df = 2) | 3 | 73.59 | 77.44 | -31.80 | 63.59 | 0.324 | 1 | 0.5692 |
| smooth (df = 3) | 4 | 75.59 | 81.59 | -31.80 | 63.59 | 0.000 | 1 | 0.9838 |
| smooth (df = 4) | 5 | 77.54 | 86.45 | -31.77 | 63.54 | 0.049 | 1 | 0.8243 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2017 | -0.4530 | -0.9924 | -0.5395 | 0.1183 | -4.562 | 0.0003 |
| last 20 years | 1999 | 2017 | -0.4530 | -0.9924 | -0.5395 | 0.1183 | -4.562 | 0.0003 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.3707 | 0.0700 | -1.6668 | 0.0675 | -24.684 | 1.0000 |
| ERL | 0.3707 | 0.1500 | -0.9047 | 0.0675 | -13.397 | 1.0000 |
Raw data with supporting information
__sdmn_hg_au.jpg "Raw data with supporting information for assessment of mercury in sediment at inner (Firth of Clyde)")
Raw data with assessment
__sdmn_hg_da.jpg "Raw data with assessment of mercury in sediment at inner (Firth of Clyde)")
Assessment plot
__sdmn_hg_as.jpg "Assessment plot for mercury in sediment at inner (Firth of Clyde)")
Metals data
__sdmn_mtlsda.jpg "Metals data for assessment of mercury in sediment at inner (Firth of Clyde)")
Metals assessment
__sdmn_mtlsas.jpg "Metals assessment of mercury in sediment at inner (Firth of Clyde)")
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for metals in sediment
- Accessment criteria for metals in sediment
