Glossary | EmitLedger documentation

Term	Definition
Scope 1	Direct GHG emissions from sources owned or controlled by the organisation: combustion, flaring, venting, fugitive leaks, process emissions.
Scope 2	Indirect emissions from purchased electricity, heat, steam or cooling. Location-based uses grid-average factors; market-based uses contractual instruments.
CO₂e	Carbon dioxide equivalent: quantities of different gases expressed as one figure using global warming potentials.
GWP / GWP set	Global warming potential of a gas relative to CO₂. A GWP set is the list of values from one IPCC Assessment Report (AR4, AR5, AR6).
Operational control / equity share	Consolidation approaches: 100 % of the assets the company operates, or the company’s equity share of each asset.
Organisation	One client’s isolated space in EmitLedger.
Asset, system, source, data stream	A facility; a group of equipment in it; an emitting item with a calculation method; a measured or reported quantity for that item.
Reporting period	One asset and one month, with a status from Open to Locked.
Stream-month	One monthly data stream in one month; the unit of data completeness.
Quality tier	The data quality level of a source; higher tiers are more specific or measured.
Emission factor	A value that converts an activity quantity into an emission quantity; in EmitLedger always with a reference, a licence and a verified flag.
HHV / LHV	Higher (gross) and lower (net) heating value: the two bases on which fuel energy and combustion factors are stated.
Library release / pin	A versioned set of reference data; a pin fixes the release used for a reporting year.
Uncertainty / coverage	The combined uncertainty of a total (IPCC Approach 1), and the share of that total whose inputs carry uncertainty data.
Restatement	An approved reopening of locked months to correct data, with the change recorded.
Base year	The reference year against which targets and changes are measured.
Pack	A set of rule checks and outputs for a reporting framework, activated per asset.
OGMP 2.0	Oil & Gas Methane Partnership 2.0, a voluntary methane reporting framework with reporting levels.
EU ETS	EU Emissions Trading System.
UK ETS	UK Emissions Trading Scheme.
US EPA GHGRP	US Greenhouse Gas Reporting Program (40 CFR Part 98).
ISO 14064-1 / GHG Protocol	Standards for organisation-level GHG inventories; the basis of the BASE pack and the inventory report.
Flaring / venting / fugitive	Burning gas in a flare; releasing gas unburnt; unintended leaks.
Blowdown	Depressurising equipment, releasing its gas inventory to flare or vent.
LDAR / OGI	Leak detection and repair; optical gas imaging, a leak survey technique.
EAC / PPA	Energy attribute certificate; power purchase agreement.
Sm³ / reference conditions	Standard cubic metre: a gas volume at stated reference temperature and pressure.
boe	Barrel of oil equivalent, used for intensity figures.
OTP / MFA	One-time password; multi-factor authentication.
SSO	Single sign-on with a company account.