Glacier recession in the Altai Mountains of Mongolia in 1990–2016

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2018-04-03 DOI:10.1080/04353676.2017.1407560

C. Pan, A. Pope, U. Kamp, A. Dashtseren, M. Walther, M. Syromyatina

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引用次数: 24

Abstract

ABSTRACT Relatively little is known about glaciers in the continental climates of North Asia and even less is known about the glaciers of the Mongolian Altai. In an attempt to fill this knowledge gap, we present a new satellite-derived glacier inventory for the Altai Mountains of Mongolia, using the recently launched Landat-8 OLI and Sentinel-2A MSI sensors to monitor glacier change from 1990 to 2016. We examine changes in climatic trends and glacier topomorphological parameters in conjunction with glacier fluctuations to determine governing controls over glacier recession in the Altai Mountains. Our glacier mapping results produced 627 debris-free glaciers with an area of 334.0 ± 42.3 km2 as of 2016. These data were made available for download through the Global Land Ice Measurements from Space (GLIMS) initiative. A subsample of 206 glaciers that were mapped in 1990, 2000, 2010, and 2016 revealed that from 1990 to 2016, glacier area reduced by 43% at 6.4 ± 0.4 km2 yr−1. Glacier recession was greatest from 1990 to 2000 at a rate of 10.9 ± 0.8 km2 yr−1, followed by 2010–2016 at 4.4 ± 0.3 km2 yr−1. Rates of glacier recession were significantly correlated with intrinsic glacier parameters, including mean, minimum and range elevations, mean slope and aspect. Furthermore, climate records indicated the warmest summer temperatures occurred during periods of high glacier recession.

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1990-2016年蒙古阿尔泰山冰川衰退

对北亚大陆性气候冰川的了解相对较少，对蒙古阿尔泰冰川的了解就更少了。为了填补这一知识空白，我们提出了一种新的基于卫星的蒙古阿尔泰山冰川清单，使用最近发射的Landat-8 OLI和Sentinel-2A MSI传感器监测1990年至2016年的冰川变化。我们研究了气候趋势和冰川地形参数的变化以及冰川波动，以确定对阿尔泰山冰川衰退的控制。截至2016年，我们的冰川测绘结果产生了627个无碎片冰川，面积为334.0±42.3 km2。这些数据可通过全球陆冰空间测量计划(GLIMS)下载。对1990年、2000年、2010年和2016年绘制的206个冰川的子样本进行分析发现，1990年至2016年，冰川面积减少了43%，减少幅度为6.4±0.4 km2 yr−1。1990 - 2000年冰川退缩幅度最大，为10.9±0.8 km2 yr - 1, 2010-2016年次之，为4.4±0.3 km2 yr - 1。冰川退缩速率与冰川内禀参数(包括平均海拔、最小海拔和最高海拔、平均坡度和坡向)显著相关。此外，气候记录表明，最温暖的夏季气温发生在冰川高度消退的时期。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.