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Excursion for understanding different sites in Siberia

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Presentation on theme: "Excursion for understanding different sites in Siberia"— Presentation transcript:

1 Excursion for understanding different sites in Siberia
(11 to 28 September, 2006)

2 Sites Igarka (N 67˚29.9’, E 86˚25.26’)Lower Yenisei (Germany)
Tura (N 64˚12’, E 100˚27’) Middle Yenisei (Japan) Tura continuous　>500m continuous　 m continuous　 m discontinuous　100m> island　25m> Yakutsk (N 62˚19’, E 129˚31’) Middle Lena (Japan)

3 Igarka, Tura, Yakutsk Igarka: Border between dark Taiga (Spruce) and light Taiga (Larch) ,　hilly relief Tura：Westernmost edge of Light Taiga (Larch), hilly relief Yakutsk：Typical Light Taiga (Larch), flat relief ？ Central Siberia Tura and Igarka: no thermokarst East Siberia Yakutsk: many large thermokarsts

4 Why are many thermokarsts in east Siberia?
Summer in 2002 Burnt in 2002 Birch Larch Thermokarst Fall in 2006 Effect of forest fire on thermokarst formation？

5 Burnt area in 2002 fire in Russia International Forest Fire News (IFFN) No. 28 (2003)
Respublika Sakha 43% Amurskaya oblast 16% Respublika Tuva 9% Chitinskaya oblast 7% Irkutskaya oblast 5% Krasnoyarskiy kray 4% Khabarovskiy krai 3% Respublika Buryatiya 3% Altaiskiy krai 3% Novosibirskaya oblast 2% Kemerovskaya oblast 1% Omskaya oblast 1% Others 3% 1.6% of total area 11.7 million ha Strong impact of forest fire in east Siberia

6 Long term thermokarst formation (Yakutsk)
Photo by R. Desyatkin Bullar Formation beginning: between 10 and several hundred years Formation of wetland between 300 to years Formation of wetland Duede Between to 2-3 thousand years Tuumpu Formation of lake Between 7-8 to (old alas) thousand years Formation of grassland Alas

7 Regeneration of forest after fire
Generation of Birch forest 5年 15年 50年 ？ Life span of Birch is 50 to 80 years Generation of Larch forest 5年 50年 200年

8 Group Photo in Yakutsk

9 Larch, Yakutsk

10 Alas, Yakutsk

11 Polygon, Yakutsk

12 Mix of Spruce, Larch and Birch (Igarka)

13 Thermokarst in Bogs (Igarka)

14 Permafrost (Igarka)

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