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North central Siberia is pictured in this Envisat image from 5 March
2012. In the lower-left corner we can see the Yenisei river, which flows
north into the Kara Sea (not pictured). The Yenisei is considered to be
the boundary between eastern and western Siberia. The majority of the
area pictured lies above the Arctic Circle. This is also an area of
continuous permafrost, where the soil is at or below freezing throughout
the year.
Although permafrost cannot be directly measured from space, factors such
as surface temperature, land cover and snow parameters, soil moisture
and terrain changes can be captured by satellites.
Credits: ESA
North central Siberia is pictured in this Envisat image from 5 March
2012. An enormous area in north Asia, Siberia spreads from the Urals in
the west to the Okhotsk Sea in the east, from the Arctic Ocean in the
north to the borders of Kazakhstan, Mongolia and China in the south.
In the lower-left corner we can see the Yenisei river, which flows north into the Kara Sea (not pictured). The Yenisei is considered to be the boundary between eastern and western Siberia.
In the lower-left corner we can see the Yenisei river, which flows north into the Kara Sea (not pictured). The Yenisei is considered to be the boundary between eastern and western Siberia.
The majority of the area pictured lies above the Arctic Circle. This is
also an area of continuous permafrost, where the soil is at or below
freezing throughout the year.
About half of the world’s underground organic carbon is found in
northern permafrost regions. This is more than double the amount of
carbon in the atmosphere in the form of the greenhouse gases carbon
dioxide and methane.
The effects of climate change are most severe and rapid in the Arctic,
causing the permafrost to thaw. When it does, it releases greenhouse
gases into the atmosphere, exacerbating the effects of climate change.
Although permafrost cannot be directly measured from space, factors such
as surface temperature, land cover and snow parameters, soil moisture
and terrain changes can be captured by satellites.
This image also shows part of the Putorana Mountains and the Putoransky
State Nature Reserve. In the native language of the Evenks, 'Putorana'
means 'the country of lakes with steep banks.'
Listed on the UNESCO World Heritage List, this area contains arctic and
subarctic ecosystems, as well as a major reindeer migration route.
ESA
Guillermo Gonzalo Sánchez Achutegui
ayabaca@gmail.com
ayabaca@hotmail.com
ayabaca@yahoo.com
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