Line P, which stretches in space from the southern tip of Vancouver Island far offshore into the Alaskan Gyre and in time back to 1956, is an oceanographic monitoring program unique in the Pacific Ocean; no other scientific program goes as far offshore on a regular basis. As one of the longest deep-sea time series in the world, it is of international interest, allowing scientists to see trends in ocean and climate variables which influence both people and fisheries.

• Ecosystems
• ocean dynamics
• phytoplankton
• time series
• zooplankton
• GOOS Essential Ocean Variables (EOVs)
  • Marine birds abundance and distribution
  • Marine mammals abundance and distribution
  • Microbe biomass and diversity
  • Phytoplankton biomass and diversity
  • Zooplankton biomass and diversity
• GOOS Readiness - Data management and information products
  • Level 8 - Mission qualified
• GOOS Readiness - Coordination of observations elements
  • Level 8 - Mission qualified
• GOOS Readiness - Requirement processes
  • Level 8 - Mission qualified
• Essential Ocean subvariables (EOV subvariables) & Essential Biodiversity Variables (EBVs)
  • Microbe genetic composition
  • Phytoplankton community composition - taxonomic/phylogenetic diversity
  • Phytoplankton in vitro/in vivo pigment fluorescence
• GOOS Physics, Biogeochemistry, and Cross-disciplinary EOVs
  • Inorganic carbon
  • Nutrients
  • Oxygen
  • Sea surface salinity
  • Sea surface temperature
  • Subsurface currents
  • Subsurface salinity
  • Subsurface temperature