CSEMP assessment of c1 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 | 5.59 | 8.59 | 0.21 | -0.41 | |||
linear | 2 | 7.52 | 13.92 | 0.24 | -0.48 | 0.067 | 1 | 0.7954 |
smooth (df = 2) | 3 | 4.86 | 17.36 | 2.57 | -5.14 | 4.657 | 1 | 0.0309 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2005 | 2018 | 5.068 | 5.004 | -0.06398 | 0.24651 | -0.260 | 0.8027 |
last 20 years | 2005 | 2018 | 5.068 | 5.004 | -0.06398 | 0.24651 | -0.260 | 0.8027 |
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 : C1 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 : C1 Naphthalenes
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020