CSEMP assessment of anthracene in sediment at Solway Firth
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 157.22 | 158.51 | -75.61 | 151.22 | |||
linear | 2 | 157.62 | 160.08 | -74.81 | 149.62 | 1.598 | 1 | 0.2061 |
smooth (df = 2) | 3 | 156.87 | 161.03 | -73.43 | 146.87 | 2.757 | 1 | 0.0969 |
smooth (df = 3) | 4 | 158.72 | 165.26 | -73.36 | 146.72 | 0.148 | 1 | 0.7000 |
smooth (df = 4) | 5 | 160.49 | 170.29 | -73.25 | 146.49 | 0.224 | 1 | 0.6362 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2001 | 2018 | 3.372 | 3.093 | -0.27893 | 0.21965 | -1.270 | 0.2235 |
last 20 years | 2001 | 2018 | 3.372 | 3.093 | -0.27893 | 0.21965 | -1.270 | 0.2235 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 22.03 | 5.00 | -1.4832 | 0.1327 | -11.179 | 1.0000 |
ERL | 22.03 | 85.00 | 1.3500 | 0.1327 | 10.176 | <0.0001 |
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 : Solway_Firth_seSF (Solway Firth)
Determinand : Anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Solway_Firth_seSF (Solway Firth)
Determinand : Anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020