CSEMP assessment of phenanthrene 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 | 148.23 | 151.23 | -71.12 | 142.23 | |||
linear | 2 | 148.73 | 155.13 | -70.36 | 140.73 | 1.504 | 1 | 0.2201 |
smooth (df = 2) | 3 | 150.18 | 162.68 | -70.09 | 140.18 | 0.546 | 1 | 0.4600 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2006 | 2016 | 2.6841 | 3.1174 | 0.4333 | 0.3301 | 1.313 | 0.2306 |
last 20 years | 2006 | 2016 | 2.6841 | 3.1174 | 0.4333 | 0.3301 | 1.313 | 0.2306 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 22.59 | 32.00 | 0.3483 | 0.2102 | 1.657 | 0.0708 |
ERL | 22.59 | 240.00 | 2.3632 | 0.2102 | 11.241 | <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 : Phenanthrene
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 : Phenanthrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020