Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL091149 |
Geophysical Monitoring Shows that Spatial Heterogeneity in Thermohydrological Dynamics Reshapes a Transitional Permafrost System | |
S. Uhlemann; B. Dafflon; J. Peterson; C. Ulrich; I. Shirley; S. Michail; S. S. Hubbard | |
2021-02-01 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Climate change is causing rapid changes of Arctic ecosystems. Yet, data needed to unravel complex subsurface processes are very rare. Using geophysical and in‐situ sensing, this study closes an observational gap associated with thermohydrological dynamics in discontinuous permafrost systems. It highlights the impact of vegetation and snow thickness distribution on subsurface thermohydrological properties and processes. Large snow accumulation near tall shrubs insulates the ground and allows for rapid and downward heat flow. Thinner snowpack above graminoid results in surficial freezing and prevents water from infiltrating into the subsurface. Analyzing short term disturbances, we found that lateral flow could be a driving factor in talik formation. Inter‐annual measurements show that deep permafrost temperatures increased by about 0.2°C over two years. The results, which suggest that snow‐vegetation‐subsurface processes are tightly coupled, will be useful for improving predictions of Arctic feedback to climate change, including how subsurface thermohydrology influences CO2 and CH4 fluxes. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/313826 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | S. Uhlemann,B. Dafflon,J. Peterson,et al. Geophysical Monitoring Shows that Spatial Heterogeneity in Thermohydrological Dynamics Reshapes a Transitional Permafrost System[J]. Geophysical Research Letters,2021. |
APA | S. Uhlemann.,B. Dafflon.,J. Peterson.,C. Ulrich.,I. Shirley.,...&S. S. Hubbard.(2021).Geophysical Monitoring Shows that Spatial Heterogeneity in Thermohydrological Dynamics Reshapes a Transitional Permafrost System.Geophysical Research Letters. |
MLA | S. Uhlemann,et al."Geophysical Monitoring Shows that Spatial Heterogeneity in Thermohydrological Dynamics Reshapes a Transitional Permafrost System".Geophysical Research Letters (2021). |
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