CSEMP assessment of c3 dibenzothiophenes in sediment at middle (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 158.14 | 160.71 | -76.07 | 152.14 | |||
linear | 2 | 159.52 | 164.86 | -75.76 | 151.52 | 0.617 | 1 | 0.4322 |
smooth (df = 2) | 3 | 161.52 | 171.52 | -75.76 | 151.52 | 0.003 | 1 | 0.9539 |
smooth (df = 3) | 4 | 162.28 | 180.28 | -75.14 | 150.28 | 1.239 | 1 | 0.2657 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2009 | 2018 | 3.1465 | 2.7115 | -0.4349 | 0.5436 | -0.800 | 0.4468 |
last 20 years | 2009 | 2018 | 3.1465 | 2.7115 | -0.4349 | 0.5436 | -0.800 | 0.4468 |
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_(middle)_seSF, middle (Firth of Clyde)
Determinand : C3 Dibenzothiophenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(middle)_seSF, middle (Firth of Clyde)
Determinand : C3 Dibenzothiophenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020