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 | 83.29 | 84.58 | -38.65 | 77.29 | | | |
| linear | 2 | 71.93 | 74.40 | -31.97 | 63.93 | 13.358 | 1 | 0.0003 |
| smooth (df = 2) | 3 | 73.82 | 77.98 | -31.91 | 63.82 | 0.119 | 1 | 0.7298 |
| smooth (df = 3) | 4 | 75.80 | 82.35 | -31.90 | 63.80 | 0.015 | 1 | 0.9014 |
| smooth (df = 4) | 5 | 77.76 | 87.56 | -31.88 | 63.76 | 0.041 | 1 | 0.8389 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2016 | -0.4451 | -0.9776 | -0.5325 | 0.1208 | -4.410 | 0.0005 |
| last 20 years | 1999 | 2016 | -0.4451 | -0.9776 | -0.5325 | 0.1208 | -4.410 | 0.0005 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.3762 | 0.0700 | -1.6816 | 0.0687 | -24.480 | 1.0000 |
| ERL | 0.3762 | 0.1500 | -0.9195 | 0.0687 | -13.385 | 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
