CSEMP assessment of c2 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 | 52.24 | 53.74 | -23.12 | 46.24 | |||
linear | 2 | 49.76 | 52.67 | -20.88 | 41.76 | 4.476 | 1 | 0.0344 |
smooth (df = 2) | 3 | 49.25 | 54.25 | -19.62 | 39.25 | 2.514 | 1 | 0.1128 |
smooth (df = 3) | 4 | 50.32 | 58.32 | -19.16 | 38.32 | 0.931 | 1 | 0.3346 |
smooth (df = 4) | 5 | 50.06 | 62.31 | -18.03 | 36.06 | 2.263 | 1 | 0.1325 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 5.911 | 5.127 | -0.7839 | 0.3405 | -2.302 | 0.0385 |
last 20 years | 2000 | 2018 | 5.911 | 5.127 | -0.7839 | 0.3405 | -2.302 | 0.0385 |
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 : C2 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 : C2 Naphthalenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020