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Permafrost Sub-grid Heterogeneity of Soil Properties Key for 3-D Soil Processes and Future Climate Projections
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för miljövetenskap och analytisk kemi.
Rekke forfattare: 12016 (engelsk)Inngår i: Frontiers in Earth Science, E-ISSN 2296-6463, Vol. 4, artikkel-id 81Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

There are massive carbon stocks stored in permafrost-affected soils due to the 3-D soil movement process called cryoturbation. For a reliable projection of the past, recent and future Arctic carbon balance, and hence climate, a reliable concept for representing cryoturbation in a land surface model (LSM) is required. The basis of the underlying transport processes is pedon-scale heterogeneity of soil hydrological and thermal properties as well as insulating layers, such as snow and vegetation. Today we still lack a concept of how to reliably represent pedon-scale properties and processes in a LSM. One possibility could be a statistical approach. This perspective paper demonstrates the importance of sub-grid heterogeneity in permafrost soils as a pre-requisite to implement any lateral transport parametrization. Representing such heterogeneity at the sub-pixel size of a LSM is the next logical step of model advancements. As a result of a theoretical experiment, heterogeneity of thermal and hydrological soil properties alone lead to a remarkable initial sub-grid range of subsoil temperature of 2C, and active-layer thickness of 150 cm in East Siberia. These results show the way forward in representing combined lateral and vertical transport of water and soil in LSMs.

sted, utgiver, år, opplag, sider
2016. Vol. 4, artikkel-id 81
Emneord [en]
soil heterogeneity, carbon cycle, climate projection, permafrost, cryoturbation, soil temperature, ice content
HSV kategori
Identifikatorer
URN: urn:nbn:se:su:diva-140369DOI: 10.3389/feart.2016.00081ISI: 000393146500001OAI: oai:DiVA.org:su-140369DiVA, id: diva2:1085173
Tilgjengelig fra: 2017-03-28 Laget: 2017-03-28 Sist oppdatert: 2023-08-28bibliografisk kontrollert

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