Millennial-scale analysis of land >23 ˚N as a carbon source and sink since the Last Glacial Maximum

Lindgren, Amelie (författare): Stockholms universitet,Institutionen för naturgeografi

Kuhry, Peter (författare): Stockholms universitet,Institutionen för naturgeografi

Holloway, Max (författare)

Lu, Zhengyao (författare)

Tanski, George (författare)

Hugelius, Gustaf (författare): Stockholms universitet,Institutionen för naturgeografi

(creator_code:org_t)

Abstract Ämnesord

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The transfers of carbon between land, ocean and atmosphere, and their relation to temperature variability over glacial and interglacial cycles continue to intrigue the scientific community. Over the past four decades, many have focused on the role of the Southern Ocean to explain the atmospheric carbon dioxide (CO2) patterns seen in ice core records, but recent advances also include mentions of a possible terrestrial component. We quantify important terrestrial organic soil carbon (C) stocks north of 23˚, using palaeo-data and modeled climate to reconstruct terrestrial C dynamics from the Last Glacial Maximum until present at millennial time steps. During the deglaciation, C storage declined to reach a minimum around 10 kyr BP, a trend which then turned and led to progressively higher soil C stocks during the Holocene. Net changes in mineral soil C stocks are small, even though significant geographic shifts occurred; instead, deglacial and interglacial terrestrial C stock dynamics are dominated by losses from permafrost loess, inundation of continental shelves and gains in peatlands, processes commonly overlooked in complex Earth System Models.

Av författaren/redakt...: Lindgren, Amelie; Kuhry, Peter; Holloway, Max; Lu, Zhengyao; Tanski, George; Hugelius, Gustaf

Om ämnet

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