CSEMP assessment of c3 naphthalenes in sediment at Holy Loch (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 46.76 | 48.15 | -20.38 | 40.76 | |||
linear | 2 | 42.99 | 45.66 | -17.49 | 34.99 | 5.776 | 1 | 0.0162 |
smooth (df = 2) | 3 | 43.33 | 47.87 | -16.66 | 33.33 | 1.663 | 1 | 0.1972 |
smooth (df = 3) | 4 | 45.16 | 52.36 | -16.58 | 33.16 | 0.160 | 1 | 0.6887 |
smooth (df = 4) | 5 | 46.09 | 56.98 | -16.05 | 32.09 | 1.072 | 1 | 0.3005 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 5.871 | 5.120 | -0.7511 | 0.2863 | -2.623 | 0.0201 |
last 20 years | 2000 | 2018 | 5.871 | 5.120 | -0.7511 | 0.2863 | -2.623 | 0.0201 |
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_FirthCInnerDunoon_se06, Holy Loch (Clyde)
Determinand : C3 Naphthalenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_FirthCInnerDunoon_se06, Holy Loch (Clyde)
Determinand : C3 Naphthalenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020