CSEMP assessment of chrysene in sediment at Skelmorlie (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 64.67 | 66.47 | -29.34 | 58.67 | |||
linear | 2 | 64.32 | 67.87 | -28.16 | 56.32 | 2.353 | 1 | 0.1250 |
smooth (df = 2) | 3 | 66.21 | 72.46 | -28.10 | 56.21 | 0.112 | 1 | 0.7377 |
smooth (df = 3) | 4 | 65.07 | 75.36 | -26.54 | 53.07 | 3.135 | 1 | 0.0766 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2013 | 5.768 | 5.142 | -0.6259 | 0.3944 | -1.587 | 0.1408 |
last 20 years | 2000 | 2013 | 5.768 | 5.142 | -0.6259 | 0.3944 | -1.587 | 0.1408 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 171.1 | 20.0 | -2.1466 | 0.2378 | -9.025 | 1.0000 |
ERL | 171.1 | 384.0 | 0.8084 | 0.2378 | 3.399 | 0.0030 |
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 : Clyde_FirthCInnerCumbraes_se02, Skelmorlie (Clyde)
Determinand : Chrysene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_FirthCInnerCumbraes_se02, Skelmorlie (Clyde)
Determinand : Chrysene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020