CSEMP assessment of c1 dibenzothiophene in sediment at Garroch Head (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 76.92 | 78.12 | -35.46 | 70.92 | |||
linear | 2 | 74.09 | 76.37 | -33.04 | 66.09 | 4.831 | 1 | 0.0280 |
smooth (df = 2) | 3 | 74.29 | 78.13 | -32.14 | 64.29 | 1.799 | 1 | 0.1799 |
smooth (df = 3) | 4 | 75.93 | 81.93 | -31.97 | 63.93 | 0.357 | 1 | 0.5504 |
smooth (df = 4) | 5 | 75.74 | 84.65 | -30.87 | 61.74 | 2.195 | 1 | 0.1385 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 3.919 | 2.997 | -0.9217 | 0.3845 | -2.397 | 0.0291 |
last 20 years | 2000 | 2018 | 3.919 | 2.997 | -0.9217 | 0.3845 | -2.397 | 0.0291 |
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_FirthCMiddleOffshor_se06, Garroch Head (Clyde)
Determinand : C1 Dibenzothiophene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_FirthCMiddleOffshor_se06, Garroch Head (Clyde)
Determinand : C1 Dibenzothiophene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020