CSEMP assessment of benzo[a]pyrene in sediment at Celtic Deep
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 16.99 | 19.99 | -5.50 | 10.99 | |||
linear | 2 | 17.51 | 23.91 | -4.76 | 9.51 | 1.476 | 1 | 0.2245 |
smooth (df = 2) | 3 | 18.91 | 31.41 | -4.45 | 8.91 | 0.609 | 1 | 0.4352 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2005 | 2018 | 4.918 | 4.522 | -0.3964 | 0.3144 | -1.261 | 0.2478 |
last 20 years | 2005 | 2018 | 4.918 | 4.522 | -0.3964 | 0.3144 | -1.261 | 0.2478 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 92 | 30 | -1.1207 | 0.2140 | -5.238 | 0.9994 |
ERL | 92 | 430 | 1.5418 | 0.2140 | 7.206 | <0.0001 |
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 : Severn_SeOpenSeaW_se01 (Celtic Deep)
Determinand : Benzo[a]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Severn_SeOpenSeaW_se01 (Celtic Deep)
Determinand : Benzo[a]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020