CSEMP assessment of indeno[123-cd]pyrene in sediment at Holy Loch (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 53.27 | 54.66 | -23.64 | 47.27 | |||
linear | 2 | 48.31 | 50.97 | -20.15 | 40.31 | 6.966 | 1 | 0.0083 |
smooth (df = 2) | 3 | 48.82 | 53.37 | -19.41 | 38.82 | 1.483 | 1 | 0.2233 |
smooth (df = 3) | 4 | 49.89 | 57.09 | -18.94 | 37.89 | 0.934 | 1 | 0.3337 |
smooth (df = 4) | 5 | 46.02 | 56.90 | -16.01 | 32.02 | 5.874 | 1 | 0.0154 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 6.449 | 5.551 | -0.8973 | 0.3057 | -2.935 | 0.0109 |
last 20 years | 2000 | 2018 | 6.449 | 5.551 | -0.8973 | 0.3057 | -2.935 | 0.0109 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 257.58 | 103.00 | -0.9166 | 0.2048 | -4.475 | 0.9997 |
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_FirthCInnerDunoon_se06, Holy Loch (Clyde)
Determinand : Indeno[123-cd]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_FirthCInnerDunoon_se06, Holy Loch (Clyde)
Determinand : Indeno[123-cd]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020