CSEMP assessment of chrysene in sediment at Off Southend-on-sea (Thames)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 91.91 | 97.91 | -42.95 | 85.91 | |||
linear | 2 | 93.71 | 109.71 | -42.85 | 85.71 | 0.201 | 1 | 0.6540 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2005 | 2017 | 3.967 | 3.324 | -0.6432 | 1.3889 | -0.463 | 0.6674 |
last 20 years | 2005 | 2017 | 3.967 | 3.324 | -0.6432 | 1.3889 | -0.463 | 0.6674 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 27.8 | 20.0 | -0.3280 | 1.0941 | -0.300 | 0.6104 |
ERL | 27.8 | 384.0 | 2.6269 | 1.0941 | 2.401 | 0.0371 |
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 : Anglia_Essex_se02, Off Southend-on-sea (Thames)
Determinand : Chrysene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Anglia_Essex_se02, Off Southend-on-sea (Thames)
Determinand : Chrysene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020