CSEMP assessment of anthracene in sediment at Holy Loch (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 52.29 | 53.68 | -23.15 | 46.29 | |||
linear | 2 | 50.09 | 52.75 | -21.04 | 42.09 | 4.206 | 1 | 0.0403 |
smooth (df = 2) | 3 | 50.85 | 55.39 | -20.42 | 40.85 | 1.241 | 1 | 0.2652 |
smooth (df = 3) | 4 | 52.66 | 59.86 | -20.33 | 40.66 | 0.190 | 1 | 0.6630 |
smooth (df = 4) | 5 | 52.31 | 63.20 | -19.16 | 38.31 | 2.341 | 1 | 0.1260 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 4.895 | 4.185 | -0.7100 | 0.3234 | -2.196 | 0.0455 |
last 20 years | 2000 | 2018 | 4.895 | 4.185 | -0.7100 | 0.3234 | -2.196 | 0.0455 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 65.67 | 5.00 | -2.5753 | 0.2188 | -11.767 | 1.0000 |
ERL | 65.67 | 85.00 | 0.2579 | 0.2188 | 1.179 | 0.1291 |
Raw data with supporting information
Raw data with assessment
Assessment plot
PAH (parent) data
PAH (parent) assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for pah_(parent) in sediment
- Accessment criteria for pah_(parent) in sediment
Media : Sediment (unsieved)
Station : Clyde_FirthCInnerDunoon_se06, Holy Loch (Clyde)
Determinand : Anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_FirthCInnerDunoon_se06, Holy Loch (Clyde)
Determinand : Anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020