Table 4: Integral indexes of molecular composition of HAs and FAs.

Plot, horizons, and depthsAromaticity, % + , %С,H-alkyl/O,N-alkyl

Humic acids
Bolshoy Lyakhovsky, A 0–3 cm11,454,51,3
Bolshoy Lyakhovsky, [H], buried 16,360,01,8
Wrangel Island, A, 0–5 cm13,745,60,8

Fulvic acids
Bolshoy Lyakhovsky, A 0–3 cm4,813,30,1
Wrangel Island, A, 0–5 cm4,216,50,2