Table 1 Overview of the subsea permafrost drill cores 4D-13, 2D-13, 4D-12, 1D-14, and 5D-13 from the Buor-Khaya Bay, drilled near Muostakh Island and in Ivashkina Lagoon

Coordinates

71°37’03”N 129°55’19”E

71°37’44”N 129°52’53”E

71°37’46”N 129°52’32”E

71°45’19”N 129°23’54”

71°44’42”N 129°24’17”E

Location

0.6 km from Muostakh

2.5 km from Muostakh

2.9 km from Muostakh

Ivashkina Lagoon

Ivashkina Lagoon

Inundation time

145 years

460 years

511 years

n.a.

n.a.

Water depth

2.5 m

3.4 m

2.5 m

3.1 m

3.6 m

Core length

21.0 m

30.4 m

55.7 m

38.2 m

27.1 m

IBPT depth

8.9 m

15.9 m

23.9 m

12.0 m

8.2 m

IBPT deepening

18.3 ± 0.1 cm year⁻¹

9.3 ± 1.7 cm year⁻¹

n.a.

n.a.

n.a.