CSEMP assessment of c2 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 | 65.69 | 66.97 | -29.84 | 59.69 | |||
linear | 2 | 63.22 | 65.68 | -27.61 | 55.22 | 4.468 | 1 | 0.0345 |
smooth (df = 2) | 3 | 61.68 | 65.84 | -25.84 | 51.68 | 3.543 | 1 | 0.0598 |
smooth (df = 3) | 4 | 62.52 | 69.06 | -25.26 | 50.52 | 1.160 | 1 | 0.2814 |
smooth (df = 4) | 5 | 63.02 | 72.82 | -24.51 | 49.02 | 1.497 | 1 | 0.2212 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 5.577 | 4.653 | -0.9243 | 0.4019 | -2.300 | 0.0362 |
last 20 years | 2000 | 2018 | 5.577 | 4.653 | -0.9243 | 0.4019 | -2.300 | 0.0362 |
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 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 : C2 Naphthalenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020