CSEMP assessment of naphthalene in sediment at inner (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 193.48 | 195.48 | -93.74 | 187.48 | |||
linear | 2 | 193.77 | 197.77 | -92.89 | 185.77 | 1.706 | 1 | 0.1914 |
smooth (df = 2) | 3 | 195.67 | 202.81 | -92.83 | 185.67 | 0.103 | 1 | 0.7483 |
smooth (df = 3) | 4 | 197.63 | 209.63 | -92.81 | 185.63 | 0.041 | 1 | 0.8397 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2005 | 2018 | 3.752 | 4.518 | 0.7662 | 0.5669 | 1.352 | 0.2063 |
last 20 years | 2005 | 2018 | 3.752 | 4.518 | 0.7662 | 0.5669 | 1.352 | 0.2063 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 91.65 | 8.00 | -2.4385 | 0.3086 | -7.901 | 1.0000 |
ERL | 91.65 | 160.00 | 0.5572 | 0.3086 | 1.805 | 0.0506 |
Raw data with supporting information
Raw data with assessment
Assessment plot
PAH (parent) data
PAH (parent) assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for pah_(parent) in sediment
- Accessment criteria for pah_(parent) in sediment
Media : Sediment (unsieved)
Station : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : Naphthalene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : Naphthalene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020