CSEMP assessment of c1 phenanthrenes in sediment at Forth Estuary
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 83.45 | 86.02 | -38.72 | 77.45 | |||
linear | 2 | 85.20 | 90.54 | -38.60 | 77.20 | 0.244 | 1 | 0.6214 |
smooth (df = 2) | 3 | 85.79 | 95.79 | -37.90 | 75.79 | 1.411 | 1 | 0.2349 |
smooth (df = 3) | 4 | 87.71 | 105.71 | -37.86 | 75.71 | 0.078 | 1 | 0.7806 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2009 | 2018 | 5.508 | 5.907 | 0.3988 | 0.7993 | 0.499 | 0.6313 |
last 20 years | 2009 | 2018 | 5.508 | 5.907 | 0.3988 | 0.7993 | 0.499 | 0.6313 |
Status assessment
No assessment criteria
Raw data with supporting information
Raw data with assessment
Assessment plot
PAH (alkylated) data
PAH (alkylated) assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for pah_(alkylated) in sediment
- Accessment criteria for pah_(alkylated) in sediment
Media : Sediment (unsieved)
Station : Forth_Estuary_seSF (Forth Estuary)
Determinand : C1 Phenanthrenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Forth_Estuary_seSF (Forth Estuary)
Determinand : C1 Phenanthrenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020