CSEMP assessment of c2 phenanthrenes in sediment at Garroch Head (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 81.05 | 82.25 | -37.52 | 75.05 | |||
linear | 2 | 74.27 | 76.55 | -33.13 | 66.27 | 8.783 | 1 | 0.0030 |
smooth (df = 2) | 3 | 74.25 | 78.10 | -32.12 | 64.25 | 2.018 | 1 | 0.1555 |
smooth (df = 3) | 4 | 75.86 | 81.86 | -31.93 | 63.86 | 0.392 | 1 | 0.5311 |
smooth (df = 4) | 5 | 75.72 | 84.62 | -30.86 | 61.72 | 2.141 | 1 | 0.1434 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 5.797 | 4.560 | -1.2366 | 0.3674 | -3.366 | 0.0039 |
last 20 years | 2000 | 2018 | 5.797 | 4.560 | -1.2366 | 0.3674 | -3.366 | 0.0039 |
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 : Clyde_FirthCMiddleOffshor_se06, Garroch Head (Clyde)
Determinand : C2 Phenanthrenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_FirthCMiddleOffshor_se06, Garroch Head (Clyde)
Determinand : C2 Phenanthrenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020