Local-scale Arctic tundra heterogeneity affects regional-scale carbon dynamics
In northern Alaska nearly 65% of the terrestrial surface is composed of polygonal ground, where geomorphic tundra landforms disproportionately influence carbon and nutrient cycling over fine spatial scales. Process-based biogeochemical models used for local to Pan-Arctic projections of ecological re...
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Online Access: | http://www.osti.gov/servlets/purl/1773659 https://www.osti.gov/biblio/1773659 https://doi.org/10.1038/s41467-020-18768-z |
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ftosti:oai:osti.gov:1773659 2023-07-30T04:01:03+02:00 Local-scale Arctic tundra heterogeneity affects regional-scale carbon dynamics Lara, M. J. McGuire, A. D. Euskirchen, E. S. Genet, H. Yi, S. Rutter, R. Iversen, C. Sloan, V. Wullschleger, S. D. 2021-04-23 application/pdf http://www.osti.gov/servlets/purl/1773659 https://www.osti.gov/biblio/1773659 https://doi.org/10.1038/s41467-020-18768-z unknown http://www.osti.gov/servlets/purl/1773659 https://www.osti.gov/biblio/1773659 https://doi.org/10.1038/s41467-020-18768-z doi:10.1038/s41467-020-18768-z 54 ENVIRONMENTAL SCIENCES 2021 ftosti https://doi.org/10.1038/s41467-020-18768-z 2023-07-11T10:02:20Z In northern Alaska nearly 65% of the terrestrial surface is composed of polygonal ground, where geomorphic tundra landforms disproportionately influence carbon and nutrient cycling over fine spatial scales. Process-based biogeochemical models used for local to Pan-Arctic projections of ecological responses to climate change typically operate at coarse-scales (1km 2 –0.5°) at which fine-scale (<1km 2 ) tundra heterogeneity is often aggregated to the dominant land cover unit. Here, we evaluate the importance of tundra heterogeneity for representing soil carbon dynamics at fine to coarse spatial scales. We leveraged the legacy of data collected near Utqiagvik, Alaska between 1973 and 2016 for model initiation, parameterization, and validation. Simulation uncertainty increased with a reduced representation of tundra heterogeneity and coarsening of spatial scale. Hierarchical cluster analysis of an ensemble of 21 st -century simulations reveals that a minimum of two tundra landforms (dry and wet) and a maximum of 4km 2 spatial scale is necessary for minimizing uncertainties (<10%) in regional to Pan-Arctic modeling applications. Other/Unknown Material Arctic Climate change Tundra Alaska SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Nature Communications 11 1 |
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Open Polar |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
language |
unknown |
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54 ENVIRONMENTAL SCIENCES |
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54 ENVIRONMENTAL SCIENCES Lara, M. J. McGuire, A. D. Euskirchen, E. S. Genet, H. Yi, S. Rutter, R. Iversen, C. Sloan, V. Wullschleger, S. D. Local-scale Arctic tundra heterogeneity affects regional-scale carbon dynamics |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
In northern Alaska nearly 65% of the terrestrial surface is composed of polygonal ground, where geomorphic tundra landforms disproportionately influence carbon and nutrient cycling over fine spatial scales. Process-based biogeochemical models used for local to Pan-Arctic projections of ecological responses to climate change typically operate at coarse-scales (1km 2 –0.5°) at which fine-scale (<1km 2 ) tundra heterogeneity is often aggregated to the dominant land cover unit. Here, we evaluate the importance of tundra heterogeneity for representing soil carbon dynamics at fine to coarse spatial scales. We leveraged the legacy of data collected near Utqiagvik, Alaska between 1973 and 2016 for model initiation, parameterization, and validation. Simulation uncertainty increased with a reduced representation of tundra heterogeneity and coarsening of spatial scale. Hierarchical cluster analysis of an ensemble of 21 st -century simulations reveals that a minimum of two tundra landforms (dry and wet) and a maximum of 4km 2 spatial scale is necessary for minimizing uncertainties (<10%) in regional to Pan-Arctic modeling applications. |
author |
Lara, M. J. McGuire, A. D. Euskirchen, E. S. Genet, H. Yi, S. Rutter, R. Iversen, C. Sloan, V. Wullschleger, S. D. |
author_facet |
Lara, M. J. McGuire, A. D. Euskirchen, E. S. Genet, H. Yi, S. Rutter, R. Iversen, C. Sloan, V. Wullschleger, S. D. |
author_sort |
Lara, M. J. |
title |
Local-scale Arctic tundra heterogeneity affects regional-scale carbon dynamics |
title_short |
Local-scale Arctic tundra heterogeneity affects regional-scale carbon dynamics |
title_full |
Local-scale Arctic tundra heterogeneity affects regional-scale carbon dynamics |
title_fullStr |
Local-scale Arctic tundra heterogeneity affects regional-scale carbon dynamics |
title_full_unstemmed |
Local-scale Arctic tundra heterogeneity affects regional-scale carbon dynamics |
title_sort |
local-scale arctic tundra heterogeneity affects regional-scale carbon dynamics |
publishDate |
2021 |
url |
http://www.osti.gov/servlets/purl/1773659 https://www.osti.gov/biblio/1773659 https://doi.org/10.1038/s41467-020-18768-z |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Tundra Alaska |
genre_facet |
Arctic Climate change Tundra Alaska |
op_relation |
http://www.osti.gov/servlets/purl/1773659 https://www.osti.gov/biblio/1773659 https://doi.org/10.1038/s41467-020-18768-z doi:10.1038/s41467-020-18768-z |
op_doi |
https://doi.org/10.1038/s41467-020-18768-z |
container_title |
Nature Communications |
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11 |
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1 |
_version_ |
1772811785200467968 |