CSEMP assessment of 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 | 164.05 | 167.05 | -79.03 | 158.05 | |||
linear | 2 | 164.69 | 171.09 | -78.34 | 156.69 | 1.366 | 1 | 0.2426 |
smooth (df = 2) | 3 | 166.63 | 179.13 | -78.32 | 156.63 | 0.057 | 1 | 0.8116 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2006 | 2016 | 2.4805 | 2.8666 | 0.3862 | 0.3125 | 1.236 | 0.2565 |
last 20 years | 2006 | 2016 | 2.4805 | 2.8666 | 0.3862 | 0.3125 | 1.236 | 0.2565 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 17.6 | 24.0 | 0.311 | 0.198 | 1.573 | 0.0799 |
ERL | 17.6 | 665.0 | 3.633 | 0.198 | 18.351 | <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 : 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 : Pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020