CSEMP assessment of naphthalene in sediment at Garroch Head (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 86.86 | 88.06 | -40.43 | 80.86 | |||
linear | 2 | 80.32 | 82.61 | -36.16 | 72.32 | 8.541 | 1 | 0.0035 |
smooth (df = 2) | 3 | 80.91 | 84.76 | -35.46 | 70.91 | 1.406 | 1 | 0.2358 |
smooth (df = 3) | 4 | 82.46 | 88.46 | -35.23 | 70.46 | 0.456 | 1 | 0.4995 |
smooth (df = 4) | 5 | 83.03 | 91.94 | -34.51 | 69.03 | 1.431 | 1 | 0.2316 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 4.458 | 3.054 | -1.4039 | 0.4274 | -3.285 | 0.0047 |
last 20 years | 2000 | 2018 | 4.458 | 3.054 | -1.4039 | 0.4274 | -3.285 | 0.0047 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 21.21 | 8.00 | -0.9749 | 0.2753 | -3.542 | 0.9986 |
ERL | 21.21 | 160.00 | 2.0208 | 0.2753 | 7.341 | <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 : Clyde_FirthCMiddleOffshor_se06, Garroch Head (Clyde)
Determinand : Naphthalene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_FirthCMiddleOffshor_se06, Garroch Head (Clyde)
Determinand : Naphthalene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020