Acronyme	Section	Meaning	Explanation
CH4	Dated material	methane	
CO2	Dated material	carbon dioxide	
CP	Water body type	coalesced polygon	shallow but wide pond occupying several polygons
DOC	Dated material	dissolved organic carbon	
IWT	Water body type	ice-wedge trough	narrow steep-sided pond located above ice wedges
KTL	Water body type	kettle	deep lake formed by melt of buried glacial ice
M	Radiocarbon signature	modern	radiocarbon age with 14C values higher than those of 1950s
RAV	Water body type	ravine	pond formed in a thermo-erosional gully
THK	Water body type	thermokarst	large but shallow lake formed by gradual permafrsot thaw