CSEMP assessment of chrysene 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 | 134.84 | 136.13 | -64.42 | 128.84 | |||
linear | 2 | 135.14 | 137.60 | -63.57 | 127.14 | 1.700 | 1 | 0.1922 |
smooth (df = 2) | 3 | 129.44 | 133.61 | -59.72 | 119.44 | 7.698 | 1 | 0.0055 |
smooth (df = 3) | 4 | 131.16 | 137.71 | -59.58 | 119.16 | 0.276 | 1 | 0.5991 |
smooth (df = 4) | 5 | 133.11 | 142.91 | -59.55 | 119.11 | 0.056 | 1 | 0.8135 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2001 | 2018 | 5.057 | 4.820 | -0.23701 | 0.18007 | -1.316 | 0.2093 |
last 20 years | 2001 | 2018 | 5.057 | 4.820 | -0.23701 | 0.18007 | -1.316 | 0.2093 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 123.9 | 20.0 | -1.8239 | 0.1466 | -12.441 | 1.0000 |
ERL | 123.9 | 384.0 | 1.1310 | 0.1466 | 7.715 | <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 : Chrysene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Solway_Firth_seSF (Solway Firth)
Determinand : Chrysene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020