CSEMP assessment of benzo[a]pyrene 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 | 97.29 | 99.29 | -45.64 | 91.29 | |||
linear | 2 | 91.10 | 95.10 | -41.55 | 83.10 | 8.187 | 1 | 0.0042 |
smooth (df = 2) | 3 | 91.94 | 99.09 | -40.97 | 81.94 | 1.159 | 1 | 0.2818 |
smooth (df = 3) | 4 | 93.63 | 105.63 | -40.82 | 81.63 | 0.312 | 1 | 0.5762 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2018 | 5.421 | 4.081 | -1.3396 | 0.3928 | -3.410 | 0.0067 |
last 20 years | 1999 | 2018 | 5.421 | 4.081 | -1.3396 | 0.3928 | -3.410 | 0.0067 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 59.2 | 30.0 | -0.6799 | 0.2577 | -2.639 | 0.9876 |
ERL | 59.2 | 430.0 | 1.9827 | 0.2577 | 7.695 | <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 (< 63 micron fraction)
Station : Firth_of_Forth_(inner)_seSF, inner (Firth of Forth)
Determinand : Benzo[a]pyrene
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[a]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020