马里昂岛古冰域的空间模型

IF 1.8 4区地球科学 Q3 ENVIRONMENTAL SCIENCES

Antarctic Science Pub Date : 2022-08-03 DOI:10.1017/S0954102022000293

E. Rudolph, D. Hedding, W. Nel

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引用次数: 0

摘要

摘要亚南极马里昂岛的冰川历史控制了非生物陆地过程以及今天在岛上发现的生物物种的定居和分布。最近的年代研究表明，该岛早期冰川消退，并确定了与过去冰动力学相关的新地貌特征。这样就可以在岛上最后一次局部冰川盛期期间和之后重新评估冰的范围。在本文中，我们通过使用基于地貌学的方法来划定古冰缘并划定可能的冰川盆地，对该岛的古冰域范围进行了修订重建。这里提出的模型为未来研究物种（如微生物和植物物种）分布和非生物过程和形式（如土壤发育和冰缘地貌）的变化提供了所需的空间背景。此外，它还强调了需要改进地球物理评估的地区，以便对以前的冰层范围进行更完整的岛屿规模重建（例如西海岸）。

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A spatial model of Marion Island's palaeo-ice extent

Abstract Sub-Antarctic Marion Island's glacial history has acted as a control on abiotic terrestrial processes and the colonization and distribution of biotic species found on the island today. Recent chronological studies have shown an early deglaciation of the island and identified new geomorphological features associated with past ice dynamics. These permit a reassessment of ice extent during and after the island's last local glacial maximum. In this paper, we provide a revised reconstruction of the island's palaeo-ice extent by using a geomorphology-based approach to delineate palaeo-ice margins and demarcate possible glacial basins. The model presented here provides the needed spatial context for future studies on the variations in the distribution of species (e.g. microorganisms and plant species) and abiotic processes and forms (e.g. soil development and periglacial landforms). In addition, it highlights areas that require improved geophysical assessment in order to produce a more complete island-scale reconstruction of former ice extents (e.g. the west coast).

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来源期刊

Antarctic Science 地学-地球科学综合

CiteScore

3.60

自引率

6.20%

发文量

审稿时长

3 months

期刊介绍： Antarctic Science provides a truly international forum for the broad spread of studies that increasingly characterise scientific research in the Antarctic. Whilst emphasising interdisciplinary work, the journal publishes papers from environmental management to biodiversity, from volcanoes to icebergs, and from oceanography to the upper atmosphere. No other journal covers such a wide range of Antarctic scientific studies. The journal attracts papers from all countries currently undertaking Antarctic research. It publishes both review and data papers with no limits on length, two-page short notes on technical developments and recent discoveries, and book reviews. These, together with an editorial discussing broader aspects of science, provide a rich and varied mixture of items to interest researchers in all areas of science. There are no page charges, or charges for colour, to authors publishing in the Journal. One issue each year is normally devoted to a specific theme or papers from a major meeting.