CSEMP assessment of benzo[g,h,i]perylene in sediment at Garroch Head (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 64.40 | 65.60 | -29.20 | 58.40 | |||
linear | 2 | 58.53 | 60.82 | -25.27 | 50.53 | 7.870 | 1 | 0.0050 |
smooth (df = 2) | 3 | 57.04 | 60.89 | -23.52 | 47.04 | 3.489 | 1 | 0.0618 |
smooth (df = 3) | 4 | 58.97 | 64.97 | -23.48 | 46.97 | 0.075 | 1 | 0.7838 |
smooth (df = 4) | 5 | 59.17 | 68.08 | -22.59 | 45.17 | 1.794 | 1 | 0.1805 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 5.922 | 4.908 | -1.014 | 0.323 | -3.139 | 0.0063 |
last 20 years | 2000 | 2018 | 5.922 | 4.908 | -1.014 | 0.323 | -3.139 | 0.0063 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 135.36 | 80.00 | -0.5259 | 0.2105 | -2.499 | 0.9881 |
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_FirthCMiddleOffshor_se06, Garroch Head (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 : Clyde_FirthCMiddleOffshor_se06, Garroch Head (Clyde)
Determinand : Benzo[g,h,i]perylene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020