CSEMP assessment of benzo[a]pyrene in sediment at inner (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 116.58 | 118.38 | -55.29 | 110.58 | |||
linear | 2 | 114.86 | 118.42 | -53.43 | 106.86 | 3.720 | 1 | 0.0538 |
smooth (df = 2) | 3 | 116.20 | 122.45 | -53.10 | 106.20 | 0.657 | 1 | 0.4176 |
smooth (df = 3) | 4 | 117.85 | 128.13 | -52.92 | 105.85 | 0.356 | 1 | 0.5506 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2002 | 2018 | 5.076 | 6.233 | 1.1566 | 0.5563 | 2.079 | 0.0618 |
last 20 years | 2002 | 2018 | 5.076 | 6.233 | 1.1566 | 0.5563 | 2.079 | 0.0618 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 509.2 | 30.0 | -2.8317 | 0.3373 | -8.395 | 1.0000 |
ERL | 509.2 | 430.0 | -0.1691 | 0.3373 | -0.501 | 0.6870 |
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 : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : Benzo[a]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : Benzo[a]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020