parts per billion per year


Data source: EPSG

Information source: ISO 1000.

Revision date: 2015-06-24

Target unit: unity per second

Remarks: Year taken to be IUGS definition of 31556925.445 seconds; see UoM code 1029. Billion is internationally ambiguous, in different languages being 1E+9 and 1E+12. One billion taken here to be 1E+9.

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