北阿拉斯加冻土带长期环极活动层监测(CALM)项目观测

IF 2 Q3 GEOGRAPHY, PHYSICAL Polar Geography Pub Date : 2021-10-14 DOI:10.1080/1088937x.2021.1988000
K. Nyland, N. Shiklomanov, D. Streletskiy, F. Nelson, A. Klene, A. Kholodov
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引用次数: 9

摘要

环极活动层监测(CALM)网络是一项正在进行的国际努力,旨在收集和传播活动层动力学的标准化测量数据,以监测近地表永久冻土参数对气候变化的响应。这项工作是对阿拉斯加冻土带环境中三个南北样带CALM站点25年(1995-2019)观测结果的提炼。在这项工作中检查的样带将苏厄德半岛的不连续永久冻土带和北极山麓和北极海岸平原西部和东部的连续永久冻土带一分为二。这些样带代表了区域气候梯度、几个地理省和区域特征的土地覆盖关联。观察部位活性层增厚7 ~ 26 cm;尽管气温变暖的趋势不那么明显,但山麓地区出现了更显著的融化。这篇综述强调了几个区域活动层对气候变暖的响应,这些响应因不同的热景观敏感性、景观变异性和记录的融化沉降而变得复杂。本报告总结的数据是公开的,是地球系统模型的重要验证资源,其中包括阿拉斯加北部和西部连续和不连续永久冻土带区域。文章接收日期2020年11月30日接收日期2021年9月28日
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Long-term Circumpolar Active Layer Monitoring (CALM) program observations in Northern Alaskan tundra
The Circumpolar Active Layer Monitoring (CALM) network is an ongoing international effort to collect and disseminate standardized measurements of active-layer dynamics to monitor the response of near-surface permafrost parameters to climate change. This work presents a distillation of 25 years (1995–2019) of observations from three north–south transects of CALM sites in tundra environments of Alaska. Transects examined in this work bisect tundra regions of discontinuous permafrost on the Seward Peninsula, and the continuous permafrost zone on the western and eastern sections of the Arctic Foothills and Arctic Coastal Plain. These transects represent regional climatic gradients, several physiographic provinces, and regionally characteristic landcover associations. Total active-layer thickening at observed sites ranged from 7 to 26 cm; more significant thaw occurred in the foothills despite less pronounced warming air temperature trends. This summary highlights several regional active layer responses to climate warming, complicated by distinct thermal landscape sensitivities, landscape variability, and documented thaw subsidence. Data summarized in this report are publicly available and represent an important validation resource for earth-system models that include regions in the continuous and discontinuous permafrost zones of northern and western Alaska. ARTICLE HISTORY Received 30 November 2020 Accepted 28 September 2021
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来源期刊
Polar Geography
Polar Geography GEOGRAPHY, PHYSICAL-
CiteScore
5.30
自引率
0.00%
发文量
13
期刊介绍: Polar Geographyis a quarterly publication that offers a venue for scholarly research on the physical and human aspects of the Polar Regions. The journal seeks to address the component interplay of the natural systems, the complex historical, political, economic, cultural, diplomatic, and security issues, and the interchange amongst them. As such, the journal welcomes comparative approaches, critical scholarship, and alternative and disparate perspectives from around the globe. The journal offers scientists a venue for publishing longer papers such as might result from distillation of a thesis, or review papers that place in global context results from coordinated national and international efforts currently underway in both Polar Regions.
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