CSEMP assessment of benzo[a]pyrene in sediment at Inner Firth of Clyde, Nth of Cumbrae
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 36.98 | 42.98 | -15.49 | 30.98 | |||
linear | 2 | 38.97 | 54.97 | -15.49 | 30.97 | 0.004 | 1 | 0.9497 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2002 | 2013 | 5.558 | 5.530 | -0.0283 | 0.4442 | -0.064 | 0.9523 |
last 20 years | 2002 | 2013 | 5.558 | 5.530 | -0.0283 | 0.4442 | -0.064 | 0.9523 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 252.1 | 30.0 | -2.1288 | 0.3277 | -6.497 | 0.9986 |
ERL | 252.1 | 430.0 | 0.5338 | 0.3277 | 1.629 | 0.0893 |
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_se01 (Inner Firth of Clyde, Nth of Cumbrae)
Determinand : Benzo[a]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_FirthCInnerCumbraes_se01 (Inner Firth of Clyde, Nth of Cumbrae)
Determinand : Benzo[a]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020