CSEMP assessment of c3 naphthalenes 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 | 71.34 | 72.54 | -32.67 | 65.34 | |||
linear | 2 | 65.65 | 67.93 | -28.82 | 57.65 | 7.689 | 1 | 0.0056 |
smooth (df = 2) | 3 | 64.57 | 68.41 | -27.28 | 54.57 | 3.080 | 1 | 0.0793 |
smooth (df = 3) | 4 | 66.28 | 72.28 | -27.14 | 54.28 | 0.291 | 1 | 0.5894 |
smooth (df = 4) | 5 | 67.10 | 76.00 | -26.55 | 53.10 | 1.181 | 1 | 0.2772 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 5.644 | 4.579 | -1.0644 | 0.3405 | -3.126 | 0.0065 |
last 20 years | 2000 | 2018 | 5.644 | 4.579 | -1.0644 | 0.3405 | -3.126 | 0.0065 |
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 Naphthalenes
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 Naphthalenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020