Estimating spatio-temporal changes in front edge of the Ronne Ice Shelf in context of climate change using remote sensing based integrated approach

IF 1.5 4区地球科学 Q3 ECOLOGY

Polar Science Pub Date : 2023-09-01 DOI:10.1016/j.polar.2023.100967

Bishakha Kundu , Avinash Kumar , Aakriti Srivastava , Debrupa Chatterjee , Fumming Xie , Dharmaveer Singh

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引用次数: 0

Abstract

Climate variability is thought to have an impact on the Ronne Ice Shelf (RIS), one of the largest ice shelf in Antarctica, located at the mouth of the Weddell Sea. However, investigations evaluating the impact of climate variability on the geometry (front edge) of this ice body have not yet been done. This study examines a spatial-temporal shift in the front edge of the Ronne Ice Shelf during the years 2004–2019 using an integrated approach based on remote sensing and climate data. The Moderate Resolution Imaging Spectro-radiometer (MODIS) satellite images have been used to study the changes in the ice shelf along transects drawn at a constant interval of 5 km throughout the 16-year period over the second half of the austral summer months (February to March). The study reveals that there has been net progradation of ∼20 km in the front edge of the ice shelf in the sector 2 between 2004 and 2019. This progradation in the ice shelf may be attributed to draining of upper ice streams to the RIS and the decrease in temperature. Thus, the present study establishes how a combination of the use of satellite imagery and statistics can effectively be used to comprehend and quantify changes in the variability of the front edge of the ice shelf.

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基于遥感综合方法估算气候变化背景下Ronne冰架前缘时空变化

气候变化被认为对罗讷冰架(RIS)有影响，罗讷冰架是南极洲最大的冰架之一，位于威德尔海口。然而，评估气候变率对该冰体几何形状(前缘)影响的研究尚未完成。本研究利用基于遥感和气候数据的综合方法，研究了2004-2019年罗纳冰架前沿的时空变化。利用中分辨率成像光谱辐射计(MODIS)卫星图像，研究了在南半球夏季的后半期(2月至3月)16年期间，沿5公里恒定间隔绘制的样带的冰架变化。该研究表明，2004年至2019年期间，第2扇区冰架前沿的净递进量为~ 20公里。这种冰架的进退可能是由于上层冰流向RIS的排水和温度的降低。因此，本研究确定了如何结合使用卫星图像和统计数据来有效地理解和量化冰架前沿变率的变化。

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

Polar Science ECOLOGY-GEOSCIENCES, MULTIDISCIPLINARY

CiteScore

3.90

自引率

5.60%

发文量

期刊介绍： Polar Science is an international, peer-reviewed quarterly journal. It is dedicated to publishing original research articles for sciences relating to the polar regions of the Earth and other planets. Polar Science aims to cover 15 disciplines which are listed below; they cover most aspects of physical sciences, geosciences and life sciences, together with engineering and social sciences. Articles should attract the interest of broad polar science communities, and not be limited to the interests of those who work under specific research subjects. Polar Science also has an Open Archive whereby published articles are made freely available from ScienceDirect after an embargo period of 24 months from the date of publication. - Space and upper atmosphere physics - Atmospheric science/climatology - Glaciology - Oceanography/sea ice studies - Geology/petrology - Solid earth geophysics/seismology - Marine Earth science - Geomorphology/Cenozoic-Quaternary geology - Meteoritics - Terrestrial biology - Marine biology - Animal ecology - Environment - Polar Engineering - Humanities and social sciences.