CSEMP assessment of benzo[a]anthracene in sediment at Off Tyne
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | -31.27 | -27.67 | 18.63 | -37.27 | |||
linear | 2 | -29.32 | -21.32 | 18.66 | -37.32 | 0.056 | 1 | 0.8130 |
smooth (df = 2) | 3 | -27.85 | -11.19 | 18.93 | -37.85 | 0.531 | 1 | 0.4661 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2005 | 2017 | 5.371 | 5.433 | 0.06188 | 0.26108 | 0.237 | 0.8205 |
last 20 years | 2005 | 2017 | 5.371 | 5.433 | 0.06188 | 0.26108 | 0.237 | 0.8205 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 228.79 | 16.00 | -2.6602 | 0.1745 | -15.248 | 1.0000 |
ERL | 228.79 | 261.00 | 0.1317 | 0.1745 | 0.755 | 0.2394 |
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 : TyneTees_TTInter_se01 (Off Tyne)
Determinand : Benzo[a]anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : TyneTees_TTInter_se01 (Off Tyne)
Determinand : Benzo[a]anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020