CSEMP assessment of pyrene in sediment at Hunterston (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 153.89 | 155.09 | -73.95 | 147.89 | |||
linear | 2 | 155.54 | 157.83 | -73.77 | 147.54 | 0.350 | 1 | 0.5540 |
smooth (df = 2) | 3 | 156.50 | 160.35 | -73.25 | 146.50 | 1.041 | 1 | 0.3076 |
smooth (df = 3) | 4 | 156.21 | 162.21 | -72.11 | 144.21 | 2.286 | 1 | 0.1305 |
smooth (df = 4) | 5 | 156.56 | 165.47 | -71.28 | 142.56 | 1.650 | 1 | 0.1990 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 5.356 | 5.530 | 0.17399 | 0.29388 | 0.592 | 0.5621 |
last 20 years | 2000 | 2018 | 5.356 | 5.530 | 0.17399 | 0.29388 | 0.592 | 0.5621 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 252.1 | 24.0 | -2.3519 | 0.1560 | -15.075 | 1.0000 |
ERL | 252.1 | 665.0 | 0.9699 | 0.1560 | 6.217 | <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 : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : Pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : Pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020