Glacier inventory and recent variations of Santa Inés Icefield, Southern Patagonia

IF 1.6 4区地球科学 Q4 ENVIRONMENTAL SCIENCES Arctic, Antarctic, and Alpine Research Pub Date : 2022-12-31 DOI:10.1080/15230430.2022.2071793

Isaac Gurdiel, C. Rada, P. Malz, M. Braun, G. Casassa

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引用次数: 1

Abstract

ABSTRACT The study of glaciers in remote regions improves our understanding of global glacier change. With an area of 149.31 ± 1.84 km2, the Santa Inés Icefield constitutes one of the largest and least studied and explored glaciated areas of Southern Patagonia. We study the extent and glacier variations of the Santa Inés Icefield over the last 75 years, and we generate the most detailed glacier inventory to date of its 24 constituting glaciers. We estimate surface elevation changes between 2000 and 2014 using Shuttle Radar Topography Mission (SRTM) and TanDEM-X digital elevation models. Our results show a generalized trend of retreat, with a glacier area loss of −9.78 ± 1.52 km2 between 1998 and 2020, with annual rate increase from −0.15 ± 0.01 km2 a−1 (1998–2005) to −0.58 ± 0.10 km2 a−1 (2005–2020), and an average thinning of 0.60 ± 0.26 m a−1 (2σ) between 2000 and 2014. No clear correlation was found between retreat or thinning rates and Accumulation Area Ratio (AAR), terminus slope, aspect, or glacier type. While ERA5 reanalysis data shows no significant climatic trends in temperature or precipitation, a small warming trend below our detection record is the most likely cause of the observed retreat and thinning of the Santa Inés Icefield.

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南巴塔哥尼亚圣塔因萨梅斯冰原的冰川库存和近期变化

对偏远地区冰川的研究提高了我们对全球冰川变化的认识。面积为149.31±1.84平方公里的圣塔因萨梅斯冰原是巴塔哥尼亚南部最大、研究和探索最少的冰川地区之一。在过去的75年里，我们研究了圣塔因萨梅斯冰原的范围和冰川变化，并生成了迄今为止最详细的24个冰川清单。我们使用航天飞机雷达地形任务(SRTM)和TanDEM-X数字高程模型估算了2000年至2014年间的地表高程变化。研究结果表明，1998 - 2020年冰川面积损失为- 9.78±1.52 km2，年损失率从- 0.15±0.01 km2 a−1(1998 - 2005)增加到- 0.58±0.10 km2 a−1(2005-2020)，2000 - 2014年冰川平均变薄0.60±0.26 m a−1 (2σ)。退缩或变薄速率与堆积面积比(AAR)、末端坡度、坡向或冰川类型之间没有明显的相关性。虽然ERA5再分析数据显示温度或降水方面没有显著的气候趋势，但低于我们探测记录的小幅度变暖趋势最有可能是观测到的圣塔因萨梅斯冰原退缩和变薄的原因。

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来源期刊

Arctic, Antarctic, and Alpine Research 地学-环境科学

CiteScore

3.00

自引率

5.00%

发文量

审稿时长

7 months

期刊介绍： The mission of Arctic, Antarctic, and Alpine Research (AAAR) is to advance understanding of cold region environments by publishing original scientific research from past, present and future high-latitude and mountain regions. Rapid environmental change occurring in cold regions today highlights the global importance of this research. AAAR publishes peer-reviewed interdisciplinary papers including original research papers, short communications and review articles. Many of these papers synthesize a variety of disciplines including ecology, climatology, geomorphology, glaciology, hydrology, paleoceanography, biogeochemistry, and social science. Papers may be uni- or multidisciplinary but should have interdisciplinary appeal. Special thematic issues and proceedings are encouraged. The journal receives contributions from a diverse group of international authors from academia, government agencies, and land managers. In addition the journal publishes opinion pieces, book reviews and in memoria. AAAR is associated with the Institute of Arctic and Alpine Research (INSTAAR) the oldest active research institute at the University of Colorado Boulder.