Excursion for understanding
different sites in Siberia
(11 to 28 September, 2006)
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 300-500m
Yakutsk
continuous 100-300m
discontinuous 100m>
island 25m>
(N 62˚19’, E 129˚31’) Middle Lena (Japan)
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
Why are many thermokarsts in east Siberia?
Summer in 2002
Fall in 2006
Thermokarst
Larch
Birch
Burnt in 2002
Effect of forest fire on thermokarst formation？
Burnt area in 2002 fire in Russia
International Forest Fire News (IFFN) No. 28 (2003)
Omskaya oblast 1%Others 3%
Kemerovskaya oblast 1%
Novosibirskaya oblast 2%
Altaiskiy krai 3%
Respublika Buryatiya 3%
Khabarovskiy krai 3%
Krasnoyarskiy kray 4%
Irkutskaya oblast 5%
Chitinskaya oblast
7%
11.7 million ha
Respublika Sakha
43%
1.6% of total area
Respublika Tuva
9%
Amurskaya oblast
16%
Strong impact of forest fire in east Siberia
Long term thermokarst formation (Yakutsk)
Photo by R. Desyatkin
Formation beginning: between 10 and several hundred years
Formation of wetland
Bullar
between 300 to 600-700 years
Duede
Between 1-1.5 to
2-3 thousand
years
Formation of wetland
Tuumpu
Formation of lake
Between 7-8 to 1016 (old alas)
thousand years
Formation of grassland
Alas
Regeneration of forest after fire
Generation of Birch forest
5年
15年
？
Generation of Larch forest
5年
50年
50年
Life span of Birch is 50 to 80 years
200年
Group Photo in Yakutsk
Larch, Yakutsk
Alas, Yakutsk
Polygon, Yakutsk
Mix of Spruce, Larch and Birch
(Igarka)
Thermokarst in Bogs (Igarka)
Permafrost (Igarka)

kyn - pvt pract