CSEMP assessment of benzo[g,h,i]perylene in sediment at inner (Firth of Forth)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 98.95 | 100.95 | -46.48 | 92.95 | |||
linear | 2 | 94.16 | 98.16 | -43.08 | 86.16 | 6.790 | 1 | 0.0092 |
smooth (df = 2) | 3 | 94.59 | 101.73 | -42.29 | 84.59 | 1.577 | 1 | 0.2091 |
smooth (df = 3) | 4 | 96.49 | 108.49 | -42.24 | 84.49 | 0.100 | 1 | 0.7516 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2018 | 5.622 | 4.298 | -1.3238 | 0.4399 | -3.009 | 0.0131 |
last 20 years | 1999 | 2018 | 5.622 | 4.298 | -1.3238 | 0.4399 | -3.009 | 0.0131 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 73.54 | 80.00 | 0.08418 | 0.28947 | 0.291 | 0.3886 |
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 (< 63 micron fraction)
Station : Firth_of_Forth_(inner)_seSF, inner (Firth of Forth)
Determinand : Benzo[g,h,i]perylene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Forth_(inner)_seSF, inner (Firth of Forth)
Determinand : Benzo[g,h,i]perylene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020