CSEMP assessment of anthracene 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 | 176.41 | 179.41 | -85.21 | 170.41 | |||
linear | 2 | 175.69 | 182.09 | -83.85 | 167.69 | 2.721 | 1 | 0.0990 |
smooth (df = 2) | 3 | 176.91 | 189.41 | -83.45 | 166.91 | 0.788 | 1 | 0.3748 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2006 | 2016 | 0.4087 | 1.0915 | 0.6828 | 0.3775 | 1.809 | 0.1134 |
last 20 years | 2006 | 2016 | 0.4087 | 1.0915 | 0.6828 | 0.3775 | 1.809 | 0.1134 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 2.98 | 5.00 | 0.518 | 0.240 | 2.161 | 0.0338 |
ERL | 2.98 | 85.00 | 3.351 | 0.240 | 13.979 | <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 : Anthracene
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 : Anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020