CSEMP assessment of benzo[g,h,i]perylene 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 | 69.69 | 71.94 | -31.85 | 63.69 | |||
linear | 2 | 71.69 | 76.26 | -31.85 | 63.69 | 0.001 | 1 | 0.9813 |
smooth (df = 2) | 3 | 72.57 | 80.90 | -31.28 | 62.57 | 1.124 | 1 | 0.2891 |
smooth (df = 3) | 4 | 61.56 | 75.96 | -24.78 | 49.56 | 13.012 | 1 | 0.0003 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2006 | 2018 | 4.984 | 4.974 | -0.0097 | 0.3912 | -0.025 | 0.9808 |
last 20 years | 2006 | 2018 | 4.984 | 4.974 | -0.0097 | 0.3912 | -0.025 | 0.9808 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 144.6 | 80.0 | -0.5920 | 0.2351 | -2.518 | 0.9836 |
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 (< 63 micron fraction)
Station : Firth_of_Clyde_(middle)_seSF, middle (Firth of Clyde)
Determinand : Benzo[g,h,i]perylene
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 : Benzo[g,h,i]perylene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020