CSEMP assessment of c3 phenanthrenes 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 | 74.24 | 75.53 | -34.12 | 68.24 | | | |
| linear | 2 | 67.20 | 69.66 | -29.60 | 59.20 | 9.043 | 1 | 0.0026 |
| smooth (df = 2) | 3 | 67.86 | 72.03 | -28.93 | 57.86 | 1.338 | 1 | 0.2474 |
| smooth (df = 3) | 4 | 69.69 | 76.24 | -28.85 | 57.69 | 0.171 | 1 | 0.6791 |
| smooth (df = 4) | 5 | 71.08 | 80.88 | -28.54 | 57.08 | 0.609 | 1 | 0.4352 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 5.575 | 4.353 | -1.2219 | 0.3568 | -3.425 | 0.0038 |
| last 20 years | 2000 | 2018 | 5.575 | 4.353 | -1.2219 | 0.3568 | -3.425 | 0.0038 |
Status assessment
No assessment criteria
Raw data with supporting information
Raw data with assessment
Assessment plot
PAH (alkylated) data
da.jpg "PAH (alkylated) data for assessment of c3 phenanthrenes in sediment at Garroch Head (Clyde)")
PAH (alkylated) assessment
as.jpg "PAH (alkylated) assessment of c3 phenanthrenes in sediment at Garroch Head (Clyde)")
Related pages
