CSEMP assessment of anthracene 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 | 105.09 | 106.29 | -49.54 | 99.09 | |||
linear | 2 | 101.61 | 103.89 | -46.80 | 93.61 | 5.482 | 1 | 0.0192 |
smooth (df = 2) | 3 | 102.70 | 106.55 | -46.35 | 92.70 | 0.904 | 1 | 0.3416 |
smooth (df = 3) | 4 | 104.65 | 110.65 | -46.33 | 92.65 | 0.051 | 1 | 0.8208 |
smooth (df = 4) | 5 | 104.90 | 113.81 | -45.45 | 90.90 | 1.750 | 1 | 0.1859 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 4.555 | 3.340 | -1.2152 | 0.5003 | -2.429 | 0.0273 |
last 20 years | 2000 | 2018 | 4.555 | 3.340 | -1.2152 | 0.5003 | -2.429 | 0.0273 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 28.21 | 5.00 | -1.7301 | 0.3306 | -5.234 | 1.0000 |
ERL | 28.21 | 85.00 | 1.1031 | 0.3306 | 3.337 | 0.0021 |
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 : Anthracene
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 : Anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020