지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.12
- 수록면
- 877 - 890 (14page)
- DOI
- 10.1007/s12303-021-0021-7
이용수
초록· 키워드
오류제보하기
The active layer thickness (ALT) is a key parameter for permafrost studies. Changes in the ALT are affected mainly by air and ground temperatures, physical and thermal properties of the surface and subsurface materials, soil moisture, vegetation, and the duration and thickness of snow cover. Ground penetrating radar (GPR) and electrical resistivity tomography (ERT) were employed across a snow fence during the thawing season to delineate and monitor the active layer of permafrost in Cambridge Bay, Nunavut, Canada. The variation of the ALT is well captured by the high-resolution time-lapse radargram. At the position of the fence, the active layer thickens over the thawing period from 0.5 m depth at the beginning to 1.0 m depth at the end. The active layer is thicker in the pre-fence area (C zone) than in the post-fence area (H zone). As the air temperature increases with time, the difference in thickness between the two zones decreases, eventually becoming almost equal. Changes in the ALT are represented in the ERT by low resistivities (< 200 Ωm), which decrease gradually with time. This occurs most significantly in the H zone due to the rapidly increasing temperature in the absence of snow cover. The electrical resistivity structure of the active layer is well correlated with the vegetation activity, as measured by the normalized difference vegetation index, air/ground temperatures, soil moisture, snow cover, and snow accumulation controlled by the fence. Geophysical data interpretation and correlation schemes with vegetation and meteorological data explored in this paper can be applied to monitor the active layer, which is expected to thin during the freezing season.
목차
등록된 정보가 없습니다.
참고문헌 (30)
참고문헌 신청
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Behmann, J. / 2018 / Specim IQ: evaluation of a new, miniaturized handheld hyperspectral camera and its application for plant pheno- typing and disease detection / Sensors 18:441
Blanc-Betes, E. / 2016 / Winter precipitation and snow accumulation drive the methane sink or source strength of Arctic tussock tundra / Global Change Biology 22:2818~2833
Briggs, M. A. / 2017 / Surface geophysical methods for characterising frozen ground in transitional permafrost landscapes / Permafrost and Periglacial Processes 28:52~65
Brown, J. / 1997 / Circum-Arctic map of permafrost and ground-ice conditions / Circum-Pacific Map 45, U.S. Geological Survey
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