CSEMP assessment of chrysene 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 | 149.94 | 151.14 | -71.97 | 143.94 | |||
linear | 2 | 151.93 | 154.22 | -71.97 | 143.93 | 0.010 | 1 | 0.9190 |
smooth (df = 2) | 3 | 153.07 | 156.91 | -71.53 | 143.07 | 0.864 | 1 | 0.3528 |
smooth (df = 3) | 4 | 152.75 | 158.75 | -70.38 | 140.75 | 2.315 | 1 | 0.1282 |
smooth (df = 4) | 5 | 152.44 | 161.35 | -69.22 | 138.44 | 2.307 | 1 | 0.1288 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 4.926 | 4.955 | 0.02900 | 0.28466 | 0.102 | 0.9201 |
last 20 years | 2000 | 2018 | 4.926 | 4.955 | 0.02900 | 0.28466 | 0.102 | 0.9201 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 141.9 | 20.0 | -1.9597 | 0.1514 | -12.941 | 1.0000 |
ERL | 141.9 | 384.0 | 0.9952 | 0.1514 | 6.572 | <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 : Chrysene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : Chrysene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020