Mapping simulated circum-Arctic organic carbon, ground ice, and vulnerability of ice-rich permafrost to degradation
Abstract Permafrost is a large reservoir of soil organic carbon, accounting for about half of all the terrestrial storage, almost equivalent to twice the atmospheric carbon storage. Hence, permafrost degradation under global warming may induce a release of a substantial amount of additional greenhou...
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ftdoajarticles:oai:doaj.org/article:c3e11941bf7d437584d2b3202e1733cb 2023-05-15T14:51:18+02:00 Mapping simulated circum-Arctic organic carbon, ground ice, and vulnerability of ice-rich permafrost to degradation Kazuyuki Saito Hirokazu Machiya Go Iwahana Hiroshi Ohno Tokuta Yokohata 2020-07-01T00:00:00Z https://doi.org/10.1186/s40645-020-00345-z https://doaj.org/article/c3e11941bf7d437584d2b3202e1733cb EN eng SpringerOpen http://link.springer.com/article/10.1186/s40645-020-00345-z https://doaj.org/toc/2197-4284 doi:10.1186/s40645-020-00345-z 2197-4284 https://doaj.org/article/c3e11941bf7d437584d2b3202e1733cb Progress in Earth and Planetary Science, Vol 7, Iss 1, Pp 1-15 (2020) Circum-Arctic Soil organic carbon Distribution of carbon and ice in permafrost Permafrost degradation Conceptual modeling Topographical and hydrological downscaling Geography. Anthropology. Recreation G Geology QE1-996.5 article 2020 ftdoajarticles https://doi.org/10.1186/s40645-020-00345-z 2022-12-31T14:03:59Z Abstract Permafrost is a large reservoir of soil organic carbon, accounting for about half of all the terrestrial storage, almost equivalent to twice the atmospheric carbon storage. Hence, permafrost degradation under global warming may induce a release of a substantial amount of additional greenhouse gases, leading to further warming. In addition to gradual degradation through heat conduction, the importance of abrupt thawing or erosion of ice-rich permafrost has recently been recognized. Such ice-rich permafrost has evolved over a long timescale (i.e., tens to hundreds of thousands of years). Although important, knowledge on the distribution of vulnerability to degradation, i.e., location and stored amount of ground ice and soil carbon in ice-rich permafrost, is still limited largely due to the scarcity of accessible in situ data. Improving the future projections for the Arctic using the Earth System Models will lead to a better understanding of the current vulnerability distribution, which is a prerequisite for conducting climatic and biogeochemical assessment that currently constitutes a large source of uncertainty. In this study, present-day circum-Arctic distributions (north of 50° N) in ground ice and organic soil carbon content are produced by a new approach to combine a newly developed conceptual carbon-ice balance model, and a downscaling technique with the topographical and hydrological information derived from a high-resolution digital elevation model (ETOPO1). The model simulated the evolution of ground ice and carbon for the recent 125 thousand years (from the Last Interglacial to the present) at 1° resolution. The 0.2° high-resolution circum-Arctic maps of the present-day ground ice and soil organic carbon, downscaled from the 1° simulations, were reasonable compared to the observation-based previous maps. These data, together with a map of vulnerability of ice-rich permafrost to degradation served as initial and boundary condition data for model improvement and the future projection of additional ... Article in Journal/Newspaper Arctic Global warming Ice permafrost Directory of Open Access Journals: DOAJ Articles Arctic Progress in Earth and Planetary Science 7 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Circum-Arctic Soil organic carbon Distribution of carbon and ice in permafrost Permafrost degradation Conceptual modeling Topographical and hydrological downscaling Geography. Anthropology. Recreation G Geology QE1-996.5 |
spellingShingle |
Circum-Arctic Soil organic carbon Distribution of carbon and ice in permafrost Permafrost degradation Conceptual modeling Topographical and hydrological downscaling Geography. Anthropology. Recreation G Geology QE1-996.5 Kazuyuki Saito Hirokazu Machiya Go Iwahana Hiroshi Ohno Tokuta Yokohata Mapping simulated circum-Arctic organic carbon, ground ice, and vulnerability of ice-rich permafrost to degradation |
topic_facet |
Circum-Arctic Soil organic carbon Distribution of carbon and ice in permafrost Permafrost degradation Conceptual modeling Topographical and hydrological downscaling Geography. Anthropology. Recreation G Geology QE1-996.5 |
description |
Abstract Permafrost is a large reservoir of soil organic carbon, accounting for about half of all the terrestrial storage, almost equivalent to twice the atmospheric carbon storage. Hence, permafrost degradation under global warming may induce a release of a substantial amount of additional greenhouse gases, leading to further warming. In addition to gradual degradation through heat conduction, the importance of abrupt thawing or erosion of ice-rich permafrost has recently been recognized. Such ice-rich permafrost has evolved over a long timescale (i.e., tens to hundreds of thousands of years). Although important, knowledge on the distribution of vulnerability to degradation, i.e., location and stored amount of ground ice and soil carbon in ice-rich permafrost, is still limited largely due to the scarcity of accessible in situ data. Improving the future projections for the Arctic using the Earth System Models will lead to a better understanding of the current vulnerability distribution, which is a prerequisite for conducting climatic and biogeochemical assessment that currently constitutes a large source of uncertainty. In this study, present-day circum-Arctic distributions (north of 50° N) in ground ice and organic soil carbon content are produced by a new approach to combine a newly developed conceptual carbon-ice balance model, and a downscaling technique with the topographical and hydrological information derived from a high-resolution digital elevation model (ETOPO1). The model simulated the evolution of ground ice and carbon for the recent 125 thousand years (from the Last Interglacial to the present) at 1° resolution. The 0.2° high-resolution circum-Arctic maps of the present-day ground ice and soil organic carbon, downscaled from the 1° simulations, were reasonable compared to the observation-based previous maps. These data, together with a map of vulnerability of ice-rich permafrost to degradation served as initial and boundary condition data for model improvement and the future projection of additional ... |
format |
Article in Journal/Newspaper |
author |
Kazuyuki Saito Hirokazu Machiya Go Iwahana Hiroshi Ohno Tokuta Yokohata |
author_facet |
Kazuyuki Saito Hirokazu Machiya Go Iwahana Hiroshi Ohno Tokuta Yokohata |
author_sort |
Kazuyuki Saito |
title |
Mapping simulated circum-Arctic organic carbon, ground ice, and vulnerability of ice-rich permafrost to degradation |
title_short |
Mapping simulated circum-Arctic organic carbon, ground ice, and vulnerability of ice-rich permafrost to degradation |
title_full |
Mapping simulated circum-Arctic organic carbon, ground ice, and vulnerability of ice-rich permafrost to degradation |
title_fullStr |
Mapping simulated circum-Arctic organic carbon, ground ice, and vulnerability of ice-rich permafrost to degradation |
title_full_unstemmed |
Mapping simulated circum-Arctic organic carbon, ground ice, and vulnerability of ice-rich permafrost to degradation |
title_sort |
mapping simulated circum-arctic organic carbon, ground ice, and vulnerability of ice-rich permafrost to degradation |
publisher |
SpringerOpen |
publishDate |
2020 |
url |
https://doi.org/10.1186/s40645-020-00345-z https://doaj.org/article/c3e11941bf7d437584d2b3202e1733cb |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Global warming Ice permafrost |
genre_facet |
Arctic Global warming Ice permafrost |
op_source |
Progress in Earth and Planetary Science, Vol 7, Iss 1, Pp 1-15 (2020) |
op_relation |
http://link.springer.com/article/10.1186/s40645-020-00345-z https://doaj.org/toc/2197-4284 doi:10.1186/s40645-020-00345-z 2197-4284 https://doaj.org/article/c3e11941bf7d437584d2b3202e1733cb |
op_doi |
https://doi.org/10.1186/s40645-020-00345-z |
container_title |
Progress in Earth and Planetary Science |
container_volume |
7 |
container_issue |
1 |
_version_ |
1766322339427909632 |