| 项目编号: | 1417345
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| 项目名称: | COLLABORATIVE RESEARCH: Ice Regime Shifts of Arctic Lakes Drive Interactions and Feedbacks with Permafrost and Climate |
| 作者: | Andrew Parsekian
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| 承担单位: | University of Wyoming
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| 批准年: | 2013
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| 开始日期: | 2014-07-01
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| 结束日期: | 2018-06-30
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| 资助金额: | USD243686
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Polar
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| 英文关键词: | permafrost thaw
; interaction
; many bedfast ice lake
; sub-lake permafrost
; regime shift
; regime change
; ice growth
; arctic lowland region
; positive feedback
; arctic climate change
; ice lake
; ice regime
; continuous permafrost
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| 英文摘要: | Shallow lakes and ponds may cover up to 40 percent of the land surface in Arctic lowland regions. Many of these water bodies traditionally freeze solid during the winter, preserving sub-lake permafrost and keeping soil carbon stocks immobile at depth. Slightly deeper lakes maintain some liquid water beneath floating ice, causing deep thaw zones in otherwise continuous permafrost. Evidence suggests that thinner ice growth in response to warmer, snowier winters is pushing many bedfast ice lakes to floating ice regimes. If such a regime shift becomes pervasive across lake-rich landscapes, resulting permafrost thaw and enhanced moisture and heat flux could generate positive feedbacks, further amplifying this regime change.
This project examines the extent and dynamics of bedfast and floating ice lakes in relation to hypothesized interactions and feedback with permafrost and climate. A combination of remote sensing, field monitoring and geophysical measurements, experiments and physical models are used to isolate processes, quantify interactions and project changes. Project findings will be relevant locally for native village subsistence and for water supply to the petroleum industry, and globally for scientists studying permafrost thaw and Arctic climate change. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/96405
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Andrew Parsekian. COLLABORATIVE RESEARCH: Ice Regime Shifts of Arctic Lakes Drive Interactions and Feedbacks with Permafrost and Climate. 2013-01-01.
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