CSEMP assessment of benzo[a]anthracene 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 | 49.79 | 51.59 | -21.90 | 43.79 | |||
linear | 2 | 51.52 | 55.07 | -21.76 | 43.52 | 0.272 | 1 | 0.6022 |
smooth (df = 2) | 3 | 53.43 | 59.68 | -21.72 | 43.43 | 0.088 | 1 | 0.7666 |
smooth (df = 3) | 4 | 53.72 | 64.01 | -20.86 | 41.72 | 1.709 | 1 | 0.1911 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2013 | 5.347 | 5.153 | -0.1939 | 0.3713 | -0.522 | 0.6118 |
last 20 years | 2000 | 2013 | 5.347 | 5.153 | -0.1939 | 0.3713 | -0.522 | 0.6118 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 172.9 | 16.0 | -2.3801 | 0.2238 | -10.637 | 1.0000 |
ERL | 172.9 | 261.0 | 0.4118 | 0.2238 | 1.840 | 0.0464 |
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]anthracene
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]anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020