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Yedoma

Yedoma er en form for permafrost, som har særlig karbonrikt frossent materiale. De ble dannet under siste istid. Innholdet av karbon (organisk materiale) kan utgjøre 50 til 90% av volumet.

Yedoma dekker rundt en million kvadratkilometer langs den 7000 km lange kysten av den østsibiriske arktiske sokkelen.

Yedoma som tiner er en betydelig kilde til atmosfærisk metan, se permafrostens karbonsyklus.

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