CSEMP assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 48.42 | 49.92 | -21.21 | 42.42 | | | |
| linear | 2 | 45.52 | 48.43 | -18.76 | 37.52 | 4.898 | 1 | 0.0269 |
| smooth (df = 2) | 3 | 46.50 | 51.50 | -18.25 | 36.50 | 1.027 | 1 | 0.3108 |
| smooth (df = 3) | 4 | 47.86 | 55.86 | -17.93 | 35.86 | 0.639 | 1 | 0.4242 |
| smooth (df = 4) | 5 | 47.55 | 59.80 | -16.77 | 33.55 | 2.310 | 1 | 0.1285 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | 6.393 | 5.619 | -0.7739 | 0.3229 | -2.397 | 0.0323 |
| last 20 years | 2000 | 2017 | 6.393 | 5.619 | -0.7739 | 0.3229 | -2.397 | 0.0323 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 275.6 | 30.0 | -2.2179 | 0.2163 | -10.256 | 1.0000 |
| ERL | 275.6 | 430.0 | 0.4447 | 0.2163 | 2.056 | 0.0302 |
Raw data with supporting information
![Raw data with supporting information for assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_frthcn_06_sdmn_bap_au.jpg "Raw data with supporting information for assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)")
Raw data with assessment
![Raw data with assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_frthcn_06_sdmn_bap_da.jpg "Raw data with assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)")
Assessment plot
![Assessment plot for benzo[a]pyrene in sediment at Holy Loch (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_frthcn_06_sdmn_bap_as.jpg "Assessment plot for benzo[a]pyrene in sediment at Holy Loch (Clyde)")
PAH (parent) data
![PAH (parent) data for assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_frthcn_06_sdmn_p(p)da.jpg "PAH (parent) data for assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)")
PAH (parent) assessment
![PAH (parent) assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_frthcn_06_sdmn_p(p)as.jpg "PAH (parent) assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)")
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