CSEMP assessment of benzo[a]anthracene in sediment at Lough Foyle
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 158.29 | 160.29 | -76.14 | 152.29 | |||
linear | 2 | 159.10 | 163.10 | -75.55 | 151.10 | 1.189 | 1 | 0.2756 |
smooth (df = 2) | 3 | 156.76 | 163.90 | -73.38 | 146.76 | 4.340 | 1 | 0.0372 |
smooth (df = 3) | 4 | 156.96 | 168.96 | -72.48 | 144.96 | 1.801 | 1 | 0.1796 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 3.772 | 3.128 | -0.6443 | 0.5754 | -1.120 | 0.2890 |
last 20 years | 2000 | 2018 | 3.772 | 3.128 | -0.6443 | 0.5754 | -1.120 | 0.2890 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 22.83 | 16.00 | -0.3554 | 0.3041 | -1.169 | 0.8652 |
ERL | 22.83 | 261.00 | 2.4365 | 0.3041 | 8.012 | <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 (< 63 micron fraction)
Station : MinchMalin_FoyleFaughanE_se01 (Lough Foyle)
Determinand : Benzo[a]anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : MinchMalin_FoyleFaughanE_se01 (Lough Foyle)
Determinand : Benzo[a]anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020