CSEMP assessment of c3 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 | 74.24 | 75.53 | -34.12 | 68.24 | |||
linear | 2 | 67.20 | 69.66 | -29.60 | 59.20 | 9.043 | 1 | 0.0026 |
smooth (df = 2) | 3 | 67.86 | 72.03 | -28.93 | 57.86 | 1.338 | 1 | 0.2474 |
smooth (df = 3) | 4 | 69.69 | 76.24 | -28.85 | 57.69 | 0.171 | 1 | 0.6791 |
smooth (df = 4) | 5 | 71.08 | 80.88 | -28.54 | 57.08 | 0.609 | 1 | 0.4352 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 5.575 | 4.353 | -1.2219 | 0.3568 | -3.425 | 0.0038 |
last 20 years | 2000 | 2018 | 5.575 | 4.353 | -1.2219 | 0.3568 | -3.425 | 0.0038 |
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 : C3 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 : C3 Phenanthrenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020