CSEMP assessment of anthracene 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 | 27.99 | 30.99 | -11.00 | 21.99 | |||
linear | 2 | 26.38 | 32.78 | -9.19 | 18.38 | 3.609 | 1 | 0.0575 |
smooth (df = 2) | 3 | 28.03 | 40.53 | -9.01 | 18.03 | 0.355 | 1 | 0.5515 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2005 | 2018 | 3.996 | 3.376 | -0.6197 | 0.2968 | -2.088 | 0.0752 |
last 20 years | 2005 | 2018 | 3.996 | 3.376 | -0.6197 | 0.2968 | -2.088 | 0.0752 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 29.27 | 5.00 | -1.7670 | 0.2068 | -8.544 | 1.0000 |
ERL | 29.27 | 85.00 | 1.0662 | 0.2068 | 5.156 | 0.0007 |
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 : Anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Severn_SeOpenSeaW_se01 (Celtic Deep)
Determinand : Anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020