Plans

[DagHjermann]

Update data

• Data through 2022
• Basis:
  • Dry-weight data for metals in mussel (except Hg?), PCB in mussel, organochlorins in mussel, PAH, and tins
  • Lipid-weight for PBDE (and HBCD?)
  • Otherwise wet-weight (and wet-weight 50 cm cod for Hg)
  • Reference: following OSPAR MIME (https://dome.ices.dk/ohat/trDocuments/2021/help_ac_biota_contaminants.html#Environment)

Update method

• Treatment of under LOQs: use NADA?
• For some PROREF, all stations have been included as reference stations -> make a "max difference among reference stations"
• Some have only 3 stations in total (chlorinated paraffins)
• Check the effect of time trends: should stations with time trends be excluded as reference stations?

Update output

• 3 significant digits (for Proref values)

Publication

• Data: refer to the ICES dataset

[DagHjermann]

NADA2: https://cran.r-project.org/web/packages/NADA2/vignettes/DataAnalysis.html

• See "Two-group tests"