CSEMP assessment of c3 naphthalenes 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 | 92.58 | 93.97 | -43.29 | 86.58 | |||
linear | 2 | 89.07 | 91.73 | -40.53 | 81.07 | 5.514 | 1 | 0.0189 |
smooth (df = 2) | 3 | 72.05 | 76.60 | -31.03 | 62.05 | 19.017 | 1 | <0.0001 |
smooth (df = 3) | 4 | 73.75 | 80.95 | -30.88 | 61.75 | 0.298 | 1 | 0.5849 |
smooth (df = 4) | 5 | 75.56 | 86.45 | -30.78 | 61.56 | 0.195 | 1 | 0.6588 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2017 | 5.557 | 4.836 | -0.7219 | 0.1736 | -4.158 | 0.0011 |
last 20 years | 2000 | 2017 | 5.557 | 4.836 | -0.7219 | 0.1736 | -4.158 | 0.0011 |
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 : C3 Naphthalenes
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 : C3 Naphthalenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020