CSEMP assessment of benzo[a]anthracene 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 | 80.90 | 82.18 | -37.45 | 74.90 | | | |
| linear | 2 | 77.13 | 79.60 | -34.57 | 69.13 | 5.763 | 1 | 0.0164 |
| smooth (df = 2) | 3 | 78.36 | 82.53 | -34.18 | 68.36 | 0.772 | 1 | 0.3796 |
| smooth (df = 3) | 4 | 79.70 | 86.24 | -33.85 | 67.70 | 0.666 | 1 | 0.4144 |
| smooth (df = 4) | 5 | 78.23 | 88.03 | -32.11 | 64.23 | 3.468 | 1 | 0.0626 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | 5.573 | 4.543 | -1.0300 | 0.3946 | -2.610 | 0.0197 |
| last 20 years | 2000 | 2017 | 5.573 | 4.543 | -1.0300 | 0.3946 | -2.610 | 0.0197 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 94 | 16 | -1.7707 | 0.2574 | -6.880 | 1.0000 |
| ERL | 94 | 261 | 1.0212 | 0.2574 | 3.968 | 0.0006 |
Raw data with supporting information
![Raw data with supporting information for assessment of benzo[a]anthracene in sediment at Garroch Head (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_frthcm_06_sdmn_baa_au.jpg "Raw data with supporting information for assessment of benzo[a]anthracene in sediment at Garroch Head (Clyde)")
Raw data with assessment
![Raw data with assessment of benzo[a]anthracene in sediment at Garroch Head (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_frthcm_06_sdmn_baa_da.jpg "Raw data with assessment of benzo[a]anthracene in sediment at Garroch Head (Clyde)")
Assessment plot
![Assessment plot for benzo[a]anthracene in sediment at Garroch Head (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_frthcm_06_sdmn_baa_as.jpg "Assessment plot for benzo[a]anthracene in sediment at Garroch Head (Clyde)")
PAH (parent) data
![PAH (parent) data for assessment of benzo[a]anthracene in sediment at Garroch Head (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_frthcm_06_sdmn_p(p)da.jpg "PAH (parent) data for assessment of benzo[a]anthracene in sediment at Garroch Head (Clyde)")
PAH (parent) assessment
![PAH (parent) assessment of benzo[a]anthracene in sediment at Garroch Head (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_frthcm_06_sdmn_p(p)as.jpg "PAH (parent) assessment of benzo[a]anthracene in sediment at Garroch Head (Clyde)")
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