CSEMP assessment of c2 naphthalenes in sediment at Celtic Deep
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 22.07 | 25.07 | -8.03 | 16.07 | |||
linear | 2 | 23.67 | 30.07 | -7.84 | 15.67 | 0.393 | 1 | 0.5305 |
smooth (df = 2) | 3 | 20.40 | 32.90 | -5.20 | 10.40 | 5.269 | 1 | 0.0217 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2005 | 2018 | 5.401 | 5.223 | -0.17842 | 0.28307 | -0.630 | 0.5485 |
last 20 years | 2005 | 2018 | 5.401 | 5.223 | -0.17842 | 0.28307 | -0.630 | 0.5485 |
Status assessment
No assessment criteria
Raw data with supporting information
Raw data with assessment
Assessment plot
PAH (alkylated) data
PAH (alkylated) assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for pah_(alkylated) in sediment
- Accessment criteria for pah_(alkylated) in sediment
Media : Sediment (unsieved)
Station : Severn_SeOpenSeaW_se01 (Celtic Deep)
Determinand : C2 Naphthalenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Severn_SeOpenSeaW_se01 (Celtic Deep)
Determinand : C2 Naphthalenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020