ECV Products and Requirements for Transient Tracers
These products and requirements reflect the Implementation Plan 2016 (GCOS-200). GCOS is reviewing and will update the requirements until 2022. More information on: gcos.wmo.int.
PRODUCT | DEFINITION | FREQ. | RES. | REQUIRED MEASUREMENT UNCERTAINTY | STABILITY | STANDARDS/ REFERENCES |
Interior Ocean CFC-12 | Concentration of CFC-12 gas in the water column [pmol kg-1] | Annual to decadal | Every 20° | ±1% | Annual to decadal | See EOV Specification Sheets: www.goosocean.org/ eov |
Interior Ocean CFC-11 | Concentration of CFC-11 gas in the water column [pmol kg-1] | Annual to decadal | Every 20° | ±1% | Annual to decadal | www.goosocean.org/ eov |
Interior Ocean SF6 | Concentration of SF6 gas in the water column [fmol kg-1] | Annual to decadal | Every 20° | ±1% | Annual to decadal | www.goosocean.org/ eov |
Interior Ocean Tritium | Concentration of Tritium gas in the water column [TU (tritium units)] | Annual to decadal | Every 20° | ±0.5%, 0.005 TU | Annual to decadal | www.goosocean.org/ eov |
Interior Ocean 3He | Concentration of δ3He gas in the water column [δ3He] | Annual to decadal | Every 20° | δ3He ±0.15% | Annual to decadal | www.goosocean.org/ eov |
Interior Ocean 14C | Concentration of 14C in the water column [Δ14C] | Annual to decadal | Every 20° | 14C ±0.4% | Annual to decadal | www.goosocean.org/ eov |
Interior Ocean 39Ar | Concentration of 39-Argon gas in the water column [39Ar pm (percent modern)] | Annual to decadal | Every 20° | 14C ±0.4% | Annual to decadal | www.goosocean.org/ eov |