CSEMP assessment of c2 dibenzothiophene in sediment at outer (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 99.14 | 100.52 | -46.57 | 93.14 | |||
linear | 2 | 96.20 | 98.87 | -44.10 | 88.20 | 4.936 | 1 | 0.0263 |
smooth (df = 2) | 3 | 88.94 | 93.48 | -39.47 | 78.94 | 9.266 | 1 | 0.0023 |
smooth (df = 3) | 4 | 90.92 | 98.12 | -39.46 | 78.92 | 0.021 | 1 | 0.8838 |
smooth (df = 4) | 5 | 89.87 | 100.76 | -37.93 | 75.87 | 3.046 | 1 | 0.0809 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2017 | 3.566 | 2.872 | -0.6942 | 0.2463 | -2.819 | 0.0145 |
last 20 years | 2000 | 2017 | 3.566 | 2.872 | -0.6942 | 0.2463 | -2.819 | 0.0145 |
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 : Firth_of_Clyde_(outer)_seSF, outer (Firth of Clyde)
Determinand : C2 Dibenzothiophene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(outer)_seSF, outer (Firth of Clyde)
Determinand : C2 Dibenzothiophene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020