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 | 82.24 | 83.44 | -38.12 | 76.24 | | | |
| linear | 2 | 78.13 | 80.42 | -35.07 | 70.13 | 6.108 | 1 | 0.0135 |
| smooth (df = 2) | 3 | 79.15 | 82.99 | -34.57 | 69.15 | 0.987 | 1 | 0.3205 |
| smooth (df = 3) | 4 | 80.79 | 86.79 | -34.40 | 68.79 | 0.351 | 1 | 0.5534 |
| smooth (df = 4) | 5 | 79.74 | 88.65 | -32.87 | 65.74 | 3.056 | 1 | 0.0804 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 5.554 | 4.531 | -1.0228 | 0.3818 | -2.679 | 0.0165 |
| last 20 years | 2000 | 2018 | 5.554 | 4.531 | -1.0228 | 0.3818 | -2.679 | 0.0165 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 92.88 | 16.00 | -1.7587 | 0.2511 | -7.004 | 1.0000 |
| ERL | 92.88 | 261.00 | 1.0332 | 0.2511 | 4.115 | 0.0004 |
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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