Thermal Regime of Permafrost on the Western Yamal Under Climate Warming

Q2 Agricultural and Biological Sciences

Geography, Environment, Sustainability Pub Date : 2023-10-08 DOI:10.24057/2071-9388-2023-2810

K. A. Nikitin, N. G. Belova, A. A. Vasiliev

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引用次数: 0

Abstract

Climate change observed in the Arctic affects all components of the natural environment, including the state of permafrost. The purpose of this study is to quantify the response of permafrost in various landscapes to changing climatic parameters. The results of long-term field observations (1978-2021) of the thermal regime of permafrost on the Western Yamal are presented. Along with the increase in mean annual air temperatures, the mean annual ground temperature over the past 43 years has increased by 1.5-2.2°C. The maximum increase of permafrost temperature values is observed on flat and polygonal tundra, the minimum increase is typical for flooded lake basins. A decrease in the annual permafrost temperature amplitude was revealed. That is caused by a rapid increase in the air temperature of the cold period, an increase in the snow thickness and an increase in soil moisture in the active layer. The shrinking in ground temperature amplitude at a depth of 5 m is 0.5-3.6°C. A trend of reducing depth of zero annual amplitude from 12-18 m (1980) to 13-16 m (2021) has been revealed.

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气候变暖下亚马尔西部永久冻土的热状态

在北极观测到的气候变化影响到自然环境的所有组成部分，包括永久冻土的状态。本研究的目的是量化不同景观的永久冻土对变化的气候参数的响应。本文介绍了西亚马尔多年冻土热状态的长期野外观测结果(1978-2021)。随着年平均气温的升高，过去43年的年平均地温升高了1.5-2.2°C。冻土带温度值增幅最大的是平坦和多边形冻土带，最小的增幅是典型的湖泊流域。多年冻土温度幅值呈下降趋势。这是由于寒期气温迅速升高，积雪厚度增加，活动层土壤水分增加造成的。5 m深度地温幅值收缩0.5 ~ 3.6℃。年零振幅深度从12-18 m(1980年)减小到13-16 m(2021年)的趋势。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geography, Environment, Sustainability Social Sciences-Geography, Planning and Development

CiteScore

2.50

自引率

0.00%

发文量

审稿时长

12 weeks

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