A new 2010 permafrost distribution map over the Qinghai-Tibet Plateau based on subregion survey maps: a benchmark for regional permafrost modeling Article Swipe
Zetao Cao
,
Zhuotong Nan
,
Hu Jianan
,
Yuhong Chen
,
Yaonan Zhang
·
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.5194/essd-2022-206
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.5194/essd-2022-206
Permafrost over the Qinghai-Tibet Plateau (QTP) has gained increasing attention due to its high sensitivity to climate change. Numerous spatial modeling studies have been conducted on the QTP to assess the status of permafrost, project future changes in permafrost, and diagnose contributors to permafrost degradation. Due to very limited number of observation stations on the QTP, these modeling studies are often hampered by the lack of validation references, calibration targets, and model constraints, whereas a high-quality permafrost distribution map can be a good option as a benchmark for spatial simulation results. Existing permafrost distribution maps on the QTP can hardly serve this purpose. An ideal benchmark map for spatial modeling should be methodologically sound, have sufficient accuracy, and be based on observations collected in specific mapping years, rather than all historical data spanning several decades. Therefore, in this study, we created a new permafrost distribution map over the QTP in 2010 through a novel permafrost mapping approach with satellite-derived ground surface thawing/freezing indices as input and survey-based subregion permafrost maps as constraints. This approach was further improved in this study to reduce parametric equifinality. It accounts for the effects of local factors by incorporating into the model an empirical soil parameter whose values are optimally estimated through spatial clustering and parameter optimization constrained by survey-based subregion permafrost maps. This new map shows a total permafrost area of about 1.086×106 km2 (41.2 % of the QTP area) and seasonally frozen ground of about 1.447×106 km2 (54.9 %) in 2010, excluding glaciers and lakes. Validations using survey-based subregion permafrost maps (Kappa = 0.74) and borehole records (Overall Accuracy = 0.85 and Kappa = 0.43) showed higher accuracy of this map than two recent maps. Inspection of regions with obvious distinctions between the maps affirms that the permafrost distribution on this map is more realistic than on the Zou et al. (2017) map. Due to the excellent accuracy demonstrated, this map can serve as a benchmark map of sufficient quality to constrain/validate land surface models and as a historical reference when projecting future permafrost changes on the QTP in the context of global warming.
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Metadata
- Type
- preprint
- Language
- en
- Landing Page
- https://doi.org/10.5194/essd-2022-206
- OA Status
- gold
- Cited By
- 4
- References
- 49
- Related Works
- 10
- OpenAlex ID
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All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4283833499Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.5194/essd-2022-206Digital Object Identifier
- Title
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A new 2010 permafrost distribution map over the Qinghai-Tibet Plateau based on subregion survey maps: a benchmark for regional permafrost modelingWork title
- Type
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preprintOpenAlex work type
- Language
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enPrimary language
- Publication year
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2022Year of publication
- Publication date
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2022-07-06Full publication date if available
- Authors
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Zetao Cao, Zhuotong Nan, Hu Jianan, Yuhong Chen, Yaonan ZhangList of authors in order
- Landing page
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https://doi.org/10.5194/essd-2022-206Publisher landing page
- Open access
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YesWhether a free full text is available
- OA status
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goldOpen access status per OpenAlex
- OA URL
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https://doi.org/10.5194/essd-2022-206Direct OA link when available
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Permafrost, Equifinality, Plateau (mathematics), Physical geography, Spatial distribution, Environmental science, Geology, Remote sensing, Hydrology (agriculture), Geography, Computer science, Geotechnical engineering, Oceanography, Mathematics, Mathematical analysis, Artificial intelligenceTop concepts (fields/topics) attached by OpenAlex
- Cited by
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4Total citation count in OpenAlex
- Citations by year (recent)
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2024: 2, 2023: 2Per-year citation counts (last 5 years)
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49Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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| referenced_works | https://openalex.org/W2074738924, https://openalex.org/W2085306913, https://openalex.org/W3097472743, https://openalex.org/W4214731327, https://openalex.org/W3135195673, https://openalex.org/W3197468152, https://openalex.org/W2117217770, https://openalex.org/W3155993469, https://openalex.org/W2443967524, https://openalex.org/W2029660080, https://openalex.org/W3037095459, https://openalex.org/W2766039791, https://openalex.org/W4321354539, https://openalex.org/W2774752002, https://openalex.org/W1998939088, https://openalex.org/W2053154970, https://openalex.org/W3024987409, https://openalex.org/W1990128059, https://openalex.org/W2889364700, https://openalex.org/W2133073532, https://openalex.org/W2921117588, https://openalex.org/W1972658936, https://openalex.org/W2102201073, https://openalex.org/W2432405417, https://openalex.org/W3102572780, https://openalex.org/W2322545094, https://openalex.org/W4394180896, https://openalex.org/W3026805678, https://openalex.org/W3115112955, https://openalex.org/W2942435959, https://openalex.org/W4253136760, https://openalex.org/W2363976062, https://openalex.org/W3016050614, https://openalex.org/W2997600677, https://openalex.org/W4403178202, https://openalex.org/W2126571256, https://openalex.org/W3015818132, https://openalex.org/W2907360793, https://openalex.org/W2997745880, https://openalex.org/W2149230623, https://openalex.org/W4281863136, https://openalex.org/W2890811181, https://openalex.org/W1968067794, https://openalex.org/W2889534203, https://openalex.org/W3081476700, https://openalex.org/W2910471638, https://openalex.org/W3193724076, https://openalex.org/W4243815121, https://openalex.org/W4403738010 |
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| corresponding_author_ids | https://openalex.org/A5006317015, https://openalex.org/A5077295889, https://openalex.org/A5101178697, https://openalex.org/A5066305833, https://openalex.org/A5100457615 |
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| sustainable_development_goals[0].display_name | Climate action |
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