CSEMP assessment of chrysene in sediment at Forth Estuary
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 105.06 | 106.56 | -49.53 | 99.06 | |||
linear | 2 | 107.02 | 109.93 | -49.51 | 99.02 | 0.035 | 1 | 0.8514 |
smooth (df = 2) | 3 | 107.40 | 112.40 | -48.70 | 97.40 | 1.628 | 1 | 0.2019 |
smooth (df = 3) | 4 | 108.99 | 116.99 | -48.49 | 96.99 | 0.406 | 1 | 0.5238 |
smooth (df = 4) | 5 | 110.72 | 122.97 | -48.36 | 96.72 | 0.270 | 1 | 0.6035 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 4.917 | 5.026 | 0.1095 | 0.5846 | 0.187 | 0.8543 |
last 20 years | 2000 | 2018 | 4.917 | 5.026 | 0.1095 | 0.5846 | 0.187 | 0.8543 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 152.4 | 20.0 | -2.0307 | 0.2922 | -6.949 | 1.0000 |
ERL | 152.4 | 384.0 | 0.9242 | 0.2922 | 3.163 | 0.0037 |
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 : Forth_Estuary_seSF (Forth Estuary)
Determinand : Chrysene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Forth_Estuary_seSF (Forth Estuary)
Determinand : Chrysene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020