CSEMP assessment of pyrene in sediment at inner (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 154.79 | 156.18 | -74.40 | 148.79 | |||
linear | 2 | 151.79 | 154.46 | -71.90 | 143.79 | 5.002 | 1 | 0.0253 |
smooth (df = 2) | 3 | 153.21 | 157.76 | -71.61 | 143.21 | 0.579 | 1 | 0.4465 |
smooth (df = 3) | 4 | 154.26 | 161.46 | -71.13 | 142.26 | 0.956 | 1 | 0.3283 |
smooth (df = 4) | 5 | 156.04 | 166.93 | -71.02 | 142.04 | 0.213 | 1 | 0.6444 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2002 | 2018 | 5.449 | 6.505 | 1.0563 | 0.4356 | 2.425 | 0.0294 |
last 20 years | 2002 | 2018 | 5.449 | 6.505 | 1.0563 | 0.4356 | 2.425 | 0.0294 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 668.6 | 24.0 | -3.327 | 0.245 | -13.572 | 1.0000 |
ERL | 668.6 | 665.0 | -0.005 | 0.245 | -0.022 | 0.5087 |
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 : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : Pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : Pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020