CSEMP assessment of chrysene 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 | 44.92 | 46.30 | -19.46 | 38.92 | |||
linear | 2 | 41.89 | 44.56 | -16.94 | 33.89 | 5.028 | 1 | 0.0249 |
smooth (df = 2) | 3 | 42.69 | 47.23 | -16.34 | 32.69 | 1.202 | 1 | 0.2728 |
smooth (df = 3) | 4 | 44.27 | 51.47 | -16.14 | 32.27 | 0.413 | 1 | 0.5205 |
smooth (df = 4) | 5 | 42.10 | 52.99 | -14.05 | 28.10 | 4.168 | 1 | 0.0412 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 6.025 | 5.327 | -0.6984 | 0.2881 | -2.424 | 0.0295 |
last 20 years | 2000 | 2018 | 6.025 | 5.327 | -0.6984 | 0.2881 | -2.424 | 0.0295 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 205.7 | 20.0 | -2.3308 | 0.1937 | -12.035 | 1.0000 |
ERL | 205.7 | 384.0 | 0.6241 | 0.1937 | 3.222 | 0.0031 |
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 : Chrysene
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 : Chrysene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020