大于各部分之和:光学遥感和沉积岩芯数据提供了冰川过程的整体视角

IF 2.8 3区 地球科学 Q2 GEOGRAPHY, PHYSICAL
Henry Jacob Miller Gage, Carolyn Hope Eyles
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引用次数: 0

摘要

在这封信中,我们提出的理由是,将沉积岩芯和被动光学遥感数据更紧密地结合起来,将为了解过去和当代的冰川沉积过程提供新的视角。沉积岩芯经常被用来研究过去的冰川过程和环境,因为它们包含了条件变化的长期地球化学和沉积学记录。相比之下,光学遥感图像则被广泛用于研究当代冰川过程,包括融水动力学、冰川退缩、崩塌和积冰。虽然沉积岩芯和光学遥感图像中的古环境数据很少同时使用,但它们是相辅相成的。沉积岩芯记录在空间上是离散的,提供长期的古环境替代数据需要假设环境与沉积物之间的联系。光学图像提供了精确的、空间范围广泛的数据,可以直观地显示当代过程,但其时间范围往往有限。我们建议,将光学遥感与沉积岩芯数据相结合的方法可以直接观察沉积学分析中的插值过程,并从更全面的角度了解冰川过程。这种整合解决了两种数据源的局限性,并通过扩大数据的时空范围、减少解释的不确定性以及将局部分析扩大到区域和全球尺度,从而加深对冰川动力学的理解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Greater than the sum of its parts: optical remote sensing and sediment core data provide a holistic perspective on glacial processes

In this letter we make the case that closer integration of sediment core and passive optical remote sensing data would provide new insights into past and contemporary glacio-sedimentary processes. Sediment cores are frequently used to study past glacial processes and environments as they contain a lengthy geochemical and sedimentological record of changing conditions. In contrast, optical remote sensing imagery is used extensively to examine contemporary glacial processes, including meltwater dynamics, glacial retreat, calving, and ice accumulation. While paleoenvironmental data from sediment cores and optical remote sensing imagery are rarely used in tandem, they are complementary. Sediment core records are spatially discrete, providing long-term paleoenvironmental proxy data which require assumptions about environment-sediment linkages. Optical imagery offers precise, spatially extensive data to visualize contemporary processes often limited in their temporal extent. We suggest that methodologies which integrate optical remotely sensing with sediment core data allow direct observation of processes interpolated from sedimentological analysis and achieve a more holistic perspective on glacial processes. This integration addresses the limitations of both data sources and can achieve a stronger understanding of glacier dynamics by expanding the spatiotemporal extent of data, reducing the uncertainty of interpretations, and broadening the local analyses to regional and global scales.

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来源期刊
Journal of Glaciology
Journal of Glaciology 地学-地球科学综合
CiteScore
5.80
自引率
14.70%
发文量
101
审稿时长
6 months
期刊介绍: Journal of Glaciology publishes original scientific articles and letters in any aspect of glaciology- the study of ice. Studies of natural, artificial, and extraterrestrial ice and snow, as well as interactions between ice, snow and the atmospheric, oceanic and subglacial environment are all eligible. They may be based on field work, remote sensing, laboratory investigations, theoretical analysis or numerical modelling, or may report on newly developed glaciological instruments. Subjects covered recently in the Journal have included palaeoclimatology and the chemistry of the atmosphere as revealed in ice cores; theoretical and applied physics and chemistry of ice; the dynamics of glaciers and ice sheets, and changes in their extent and mass under climatic forcing; glacier energy balances at all scales; glacial landforms, and glaciers as geomorphic agents; snow science in all its aspects; ice as a host for surface and subglacial ecosystems; sea ice, icebergs and lake ice; and avalanche dynamics and other glacial hazards to human activity. Studies of permafrost and of ice in the Earth’s atmosphere are also within the domain of the Journal, as are interdisciplinary applications to engineering, biological, and social sciences, and studies in the history of glaciology.
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