An update on recent glacier changes in Mexico using Sentinel-2A data

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2018-05-30 DOI:10.1080/04353676.2018.1478672

Bijeesh KV, Shanshan Wang

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引用次数: 6

Abstract

ABSTRACT This study estimated the recent evolution of three glacierized stratovolcanoes – namely Volcán Iztaccíhuatl, Volcán Popocatépetl and Volcán Citlaltépetl – in South-central Mexico using Landsat and Sentinel-2A satellite data acquired between 1973 and 2017. These three glaciers are influenced by various factors such as climate change, volcanic eruption and pollution. Three key climate variables, which control the presence of glacier coverage – air temperature, precipitation and humidity – were also analysed. Among these three volcanoes, only Volcán Iztaccíhuatl and Volcán Citlaltépetl have ice-covered areas since the late 1990s and Volcán Popocatépetl has lost its glaciers due to volcanic eruption, even though the glacier shrinkage has started long before the appearance of eruptive products. An overall glacier area loss of 75% has been observed for the period between 1973 and 2017. Shrinkage of Volcán Citlaltépetl (66%) is comparable with the retreat observed in the tropical Andes of Peru and Bolivia during the same period. Observed trends in the air temperature were not very significant for all the three glaciers studied whereas a substantial rise in relative humidity (+0.11%/year) was observed. Trends in precipitation were different for Citlaltépetl (+7.8 mm/year) and the other two volcano-glaciers (−5.1 mm/year).

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利用Sentinel-2A数据更新墨西哥近期冰川变化

本研究利用1973年至2017年间获得的Landsat和Sentinel-2A卫星数据，估计了墨西哥中南部三个冰川层状火山(Volcán Iztaccíhuatl、Volcán popocatsametel和Volcán citlaltsametel)的近期演变。这三个冰川受到气候变化、火山喷发和污染等多种因素的影响。他们还分析了控制冰川覆盖的三个关键气候变量——气温、降水和湿度。在这三座火山中，只有Volcán Iztaccíhuatl和Volcán西特阿尔茨海默特火山自20世纪90年代末以来一直被冰雪覆盖，而Volcán波波卡塔海默特火山由于火山喷发而失去了冰川，尽管冰川的萎缩早在火山喷发产物出现之前就开始了。在1973年至2017年期间，观察到总体冰川面积损失了75%。Volcán citlaltsametl的萎缩(66%)与同期秘鲁和玻利维亚热带安第斯山脉的萎缩相当。观测到的三个冰川的气温变化趋势并不十分显著，但观测到相对湿度大幅上升(+0.11%/年)。citlaltsamutel (+7.8 mm/年)和其他两个火山冰川(- 5.1 mm/年)的降水趋势不同。

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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.