CSEMP assessment of anthracene 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 | 140.09 | 141.89 | -67.05 | 134.09 | |||
linear | 2 | 139.11 | 142.67 | -65.56 | 131.11 | 2.982 | 1 | 0.0842 |
smooth (df = 2) | 3 | 140.32 | 146.57 | -65.16 | 130.32 | 0.793 | 1 | 0.3732 |
smooth (df = 3) | 4 | 139.06 | 149.34 | -63.53 | 127.06 | 3.260 | 1 | 0.0710 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2003 | 2018 | 3.876 | 4.860 | 0.9844 | 0.5379 | 1.830 | 0.0944 |
last 20 years | 2003 | 2018 | 3.876 | 4.860 | 0.9844 | 0.5379 | 1.830 | 0.0944 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 129.08 | 5.00 | -3.251 | 0.284 | -11.428 | 1.0000 |
ERL | 129.08 | 85.00 | -0.418 | 0.284 | -1.469 | 0.9150 |
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 : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : Anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : Anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020