CSEMP assessment of c3 dibenzothiophenes 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 | 50.29 | 51.68 | -22.15 | 44.29 | |||
linear | 2 | 48.25 | 50.92 | -20.13 | 40.25 | 4.039 | 1 | 0.0445 |
smooth (df = 2) | 3 | 48.39 | 52.94 | -19.20 | 38.39 | 1.858 | 1 | 0.1729 |
smooth (df = 3) | 4 | 50.39 | 57.59 | -19.20 | 38.39 | 0.002 | 1 | 0.9691 |
smooth (df = 4) | 5 | 50.30 | 61.19 | -18.15 | 36.30 | 2.092 | 1 | 0.1481 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 4.467 | 3.828 | -0.6387 | 0.2977 | -2.145 | 0.0500 |
last 20 years | 2000 | 2018 | 4.467 | 3.828 | -0.6387 | 0.2977 | -2.145 | 0.0500 |
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 Dibenzothiophenes
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 Dibenzothiophenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020