Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL092476 |
Quantifying overestimated permafrost extent driven by rock glacier inventory | |
Bin Cao; Xin Li; Min Feng; Donghai Zheng | |
2021-04-11 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Rock glaciers (RGs) are normally used as ”ground‐truth” observations to indicate the presence of permafrost, and hence extensively used in training permafrost distribution models. However, the unique structure and composition of RGs enhance ground cooling effects, leading to more favorable conditions for permafrost presence than in adjacent ground. We therefore hypothesized and confirmed that permafrost extent is overestimated using RG‐driven models. The results indicate that the permafrost zonation index was overestimated by about 8.4–13.1% in a model driven by RG observations compared to a model using in situ measurements of permafrost presence/absence. The bias is particularly pronounced in discontinuous permafrost region, where it is thought to be highly sensitive to climate change, resulting in about a 41.8–90.8% overestimation in permafrost region and 7.0–18.6% misclassification. In order to better use the large RG datasets available to understand permafrost conditions, we provide a method to correct this bias in a fundamental model. |
领域 | 气候变化 |
URL | 查看原文 |
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文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/321978 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Bin Cao,Xin Li,Min Feng,et al. Quantifying overestimated permafrost extent driven by rock glacier inventory[J]. Geophysical Research Letters,2021. |
APA | Bin Cao,Xin Li,Min Feng,&Donghai Zheng.(2021).Quantifying overestimated permafrost extent driven by rock glacier inventory.Geophysical Research Letters. |
MLA | Bin Cao,et al."Quantifying overestimated permafrost extent driven by rock glacier inventory".Geophysical Research Letters (2021). |
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