CSEMP assessment of benzo[a]pyrene in sediment at Skelmorlie (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 57.34 | 59.14 | -25.67 | 51.34 | |||
linear | 2 | 57.61 | 61.17 | -24.81 | 49.61 | 1.724 | 1 | 0.1892 |
smooth (df = 2) | 3 | 59.49 | 65.74 | -24.75 | 49.49 | 0.119 | 1 | 0.7302 |
smooth (df = 3) | 4 | 60.69 | 70.97 | -24.34 | 48.69 | 0.806 | 1 | 0.3692 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2013 | 5.828 | 5.371 | -0.4564 | 0.3396 | -1.344 | 0.2060 |
last 20 years | 2000 | 2013 | 5.828 | 5.371 | -0.4564 | 0.3396 | -1.344 | 0.2060 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 215.2 | 30.0 | -1.9703 | 0.2052 | -9.601 | 1.0000 |
ERL | 215.2 | 430.0 | 0.6923 | 0.2052 | 3.374 | 0.0031 |
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_FirthCInnerCumbraes_se02, Skelmorlie (Clyde)
Determinand : Benzo[a]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_FirthCInnerCumbraes_se02, Skelmorlie (Clyde)
Determinand : Benzo[a]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020