What is GWP-IOBC?
IOBC «Instantaneous oxidation of biogenic carbon»: Reference for its origin: https://cbmjournal.biomedcentral.com/articles/10.1186/s13021-019-0129-5
The GWP-IOBC/GHG indicator includes all contribution to GWP except that emissions and uptake of biogenic carbon, including temporary stored in products and packaging (as in Table 9 in EN 15804:2012+A2:2019), which is set to zero (i.e. direct balanced out while other biogenic substances like methane etc has a characterisation factor and therefore accounted for as greenhouse gases). This indicator is often the default in LCA-software in the past and has in the EN 15804 standardisation process been known as «+/- 1 kg biogenic CO2 = 0 kg CO2e, or just 0/0». In published standards, it is described as type 2 in EN 16760.