CSEMP assessment of CB138 in sediment at North Minch
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 94.62 | 96.62 | -44.31 | 88.62 | |||
linear | 2 | 93.94 | 97.94 | -42.97 | 85.94 | 2.684 | 1 | 0.1014 |
smooth (df = 2) | 3 | 95.77 | 102.91 | -42.88 | 85.77 | 0.169 | 1 | 0.6814 |
smooth (df = 3) | 4 | 96.72 | 108.72 | -42.36 | 84.72 | 1.052 | 1 | 0.3051 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2006 | 2018 | -2.4398 | -1.2735 | 1.1663 | 0.6911 | 1.688 | 0.1224 |
last 20 years | 2006 | 2018 | -2.4398 | -1.2735 | 1.1663 | 0.6911 | 1.688 | 0.1224 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.28 | 0.15 | -0.624 | 0.394 | -1.585 | 0.9279 |
EAC | 0.28 | 7.90 | 3.340 | 0.394 | 8.487 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for chlorobiphenyls in sediment
- Accessment criteria for chlorobiphenyls in sediment
Media : Sediment (unsieved)
Station : MinchMalin_TheMinchNorth_se01 (North Minch)
Determinand : CB138
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : MinchMalin_TheMinchNorth_se01 (North Minch)
Determinand : CB138
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020