CSEMP assessment of chrysene in sediment at Sea of Hebrides
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 159.63 | 162.63 | -76.81 | 153.63 | |||
linear | 2 | 160.63 | 167.03 | -76.31 | 152.63 | 1.001 | 1 | 0.3171 |
smooth (df = 2) | 3 | 162.22 | 174.72 | -76.11 | 152.22 | 0.412 | 1 | 0.5207 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2006 | 2016 | 2.5958 | 2.9615 | 0.3656 | 0.3432 | 1.065 | 0.3220 |
last 20 years | 2006 | 2016 | 2.5958 | 2.9615 | 0.3656 | 0.3432 | 1.065 | 0.3220 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 19.3 | 20.0 | 0.0343 | 0.2183 | 0.157 | 0.4398 |
ERL | 19.3 | 384.0 | 2.9892 | 0.2183 | 13.695 | <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 : MinchMalin_SeaOfHebrides_se01 (Sea of Hebrides)
Determinand : Chrysene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : MinchMalin_SeaOfHebrides_se01 (Sea of Hebrides)
Determinand : Chrysene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020