CSEMP assessment of chrysene in sediment at middle (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 95.94 | 98.19 | -44.97 | 89.94 | |||
linear | 2 | 96.55 | 101.12 | -44.27 | 88.55 | 1.392 | 1 | 0.2380 |
smooth (df = 2) | 3 | 93.02 | 101.35 | -41.51 | 83.02 | 5.531 | 1 | 0.0187 |
smooth (df = 3) | 4 | 91.51 | 105.91 | -39.76 | 79.51 | 3.504 | 1 | 0.0612 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2008 | 2018 | 4.310 | 4.617 | 0.30707 | 0.24693 | 1.244 | 0.2451 |
last 20 years | 2008 | 2018 | 4.310 | 4.617 | 0.30707 | 0.24693 | 1.244 | 0.2451 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 101.2 | 20.0 | -1.6211 | 0.1460 | -11.106 | 1.0000 |
ERL | 101.2 | 384.0 | 1.3338 | 0.1460 | 9.138 | <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 : Firth_of_Clyde_(middle)_seSF, middle (Firth of Clyde)
Determinand : Chrysene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(middle)_seSF, middle (Firth of Clyde)
Determinand : Chrysene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020