Table 1 Geographical position of the 11 archaeological sites in addition to mean annual thawing degree days (TDD) and the duration of the thaw period at the soil surface.

From: Fungal attack on archaeological wooden artefacts in the Arctic—implications in a changing climate

Site no

Site

Latitude

Longitude

Cultural phases

Mean annual TDD (°C)a

Duration of thaw period (days)b

1

Nuulliit

76.80295

 − 70.81849

Indepence 1, Late Dorset, Thule

537

95

2

Sermermiut

69.20172

 − 51.12855

Saqqaq, Dorset, Thule

680

114

3

Qajaa

69.12777

 − 50.70622

Saqqaq, Dorset, Thule

419

122

4

Austmannadal, (V53d)

64.21992

 − 49.832758

Norse

1,236

133

5

Kilaarsarfik (Sandnes)

64.24264

 − 50.182338

Saqqaq, Dorset, Norse

1,351

136

6

Iffiartarfik

64.46319

 − 50.651597

Norse, Thule, Colonial (Hernnhut, Moravian)

1,215

151

7

Qoornoq

64.53314

 − 51.089226

Norse, Thule, Colonial, Saqqaq (at nearby Tuapagssuit),

798

129

8

Ersaa

64.25176

 − 51.602684

Thule, Colonial

910

144

9

Kangeq

64.10958

 − 52.054651

Saqqaq, Thule, Colonial

648

144

10

Kangerdluarssugssuaic

63.30012

 − 51.10244

Thule, Colonial

834

133

11

Gardar (Igaliku)

60.98646

 − 45.42144

Norse

1,265

154

  1. aMean annual thawing degree days (TTD) from 2001 to 2016 based on cloud-corrected and gap-filled MODIS MOD11A1 land surface temperatures.
  2. bMean annual number of consecutive days with positive (> 0 °C) temperatures from 2001 to 2016. Based on the same input data as (1).
  3. The site numbers refer to location on the map in Fig. 1.