CSEMP assessment of benzo[a]pyrene in sediment at Sea of Hebrides
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 147.77 | 150.77 | -70.89 | 141.77 | |||
linear | 2 | 148.74 | 155.14 | -70.37 | 140.74 | 1.033 | 1 | 0.3094 |
smooth (df = 2) | 3 | 150.35 | 162.85 | -70.17 | 140.35 | 0.390 | 1 | 0.5324 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2006 | 2016 | 2.5562 | 2.8610 | 0.30474 | 0.28329 | 1.076 | 0.3177 |
last 20 years | 2006 | 2016 | 2.5562 | 2.8610 | 0.30474 | 0.28329 | 1.076 | 0.3177 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 17.5 | 30.0 | 0.540 | 0.180 | 3.007 | 0.0099 |
ERL | 17.5 | 430.0 | 3.203 | 0.180 | 17.829 | <0.0001 |
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 : MinchMalin_SeaOfHebrides_se01 (Sea of Hebrides)
Determinand : Benzo[a]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : MinchMalin_SeaOfHebrides_se01 (Sea of Hebrides)
Determinand : Benzo[a]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020