Table 1.

Data of collected samples

Sampling location	Sample type	Sampling time
Greenland, Kangerlussuaq, Ice Sheet (67° 04′ 43″ N 49° 20′ 29″ W)	Snow	July 2017
	Dark ice
	Clear ice
	Supraglacial water
Norway, Svalbard, Ny-Ålesund:		August 2017
Midtre Lovénbreen (78° 53′ 37″ N 12° 04′ 13″ E)	Subglacial ice
Midtre Lovénbreen (78° 53′ 25″ N 12° 03′ 15″ E)	Glacial meltwater
Vestre Brøggerbreen (78° 54′ 55″ N 11° 45′ 48″ E)	Subglacial ice
Pedersenbreen (78° 52′ 46″ N 12° 17′ 57″ E)	Subglacial ice