Fifty metres of sea would drown West Siberia’s heart
Between the Urals and the Yenisei lies the West Siberian Plain—often called Earth’s largest unbroken lowland. So flat are its Cenozoic sediments that a fifty-metre sea-level rise would flood a corridor from the Arctic Ocean deep into the continent.
Harsh, long winters set a subarctic or continental mood across peat and swamp. The Yenisei alone races about 3,530 kilometres south to north, dumping more than twenty million litres of water a second into the Arctic. Histosol and Histel soils mark one of the world’s greatest peatland provinces, storing carbon in soggy hush while petroleum and gas fields punch industrial holes through the same horizontality.
Eight vegetation belts climb the latitude ladder: tundra, forest-tundra, northern through southern taiga, sub-taiga, forest-steppe, and steppe. Animal diversity thins toward the cold north even as plant geography stays neatly zoned. The plain is mostly alluvium—extraordinarily level—so tiny elevation changes redraw drainage and freeze patterns across hundreds of kilometres.
As a Great Russian Region it rivals the East European Plain in national imagination, yet feels wetter and emptier: bog first, city second. Oil wealth and permafrost fragility share the same map. Flatness here is not boring; it is a planetary-scale experiment in what happens when rivers, ice, and peat meet almost no slope at all.Flatness at this scale turns peat, oil, and flood risk into one horizontal problem.
Eight vegetation belts step from tundra to steppe across the same near-horizontal sediments. Oil and gas fields pierce peat that would drown under only tens of metres of extra sea level between Arctic and interior. The Yenisei’s Arctic flood—more than twenty million litres a second—crosses the plain’s eastern margin. Histosol peat provinces store carbon in the same horizontal hush that oil rigs puncture.
Source: West Siberian Plain
