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		<isbn>978-85-17-00088-1</isbn>
		<label>60088</label>
		<citationkey>BacaneliSaüt:2017:VaPoFr</citationkey>
		<title>Variações na posição da frente da Geleira Marinelli ? Cordilheira Darwin</title>
		<format>Internet</format>
		<year>2017</year>
		<secondarytype>PRE CN</secondarytype>
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		<size>1069 KiB</size>
		<author>Bacaneli, Milena dos Santos,</author>
		<author>Saüt, Maíra Moita,</author>
		<electronicmailaddress>msbacaneli@gmail.com</electronicmailaddress>
		<editor>Gherardi, Douglas Francisco Marcolino,</editor>
		<editor>Aragão, Luiz Eduardo Oliveira e Cruz de,</editor>
		<e-mailaddress>daniela.seki@inpe.br</e-mailaddress>
		<conferencename>Simpósio Brasileiro de Sensoriamento Remoto, 18 (SBSR)</conferencename>
		<conferencelocation>Santos</conferencelocation>
		<date>28-31 maio 2017</date>
		<publisher>Instituto Nacional de Pesquisas Espaciais (INPE)</publisher>
		<publisheraddress>São José dos Campos</publisheraddress>
		<pages>1886-1892</pages>
		<booktitle>Anais</booktitle>
		<organization>Instituto Nacional de Pesquisas Espaciais (INPE)</organization>
		<transferableflag>1</transferableflag>
		<abstract>The present work aims to analyze changes in the Marinelli glacier front, located in the Cordillera Darwin Icefield (CDI), over the past ten years. Images from ASTER and OLI sensors, from Terra and LANDSAT satellites, were obtained for analysis. To determine changes in glacier front position, vectors were created using QGIS software, using the average positioning method. To calculate the distance between the line of the glacier front each year, well-spaced and common points were selected. It was possible to measure changes year to year by estimating the distance between these lines. The differences between average coordinates of the glacier front from different sample years presented a significant loss in mass during the studied period. A 1.64 km retreat was observed for the study period. The largest loss of total mass was observed between two consecutive years 2011 and 2012, which had a retreat rate of 0.286 km. Retreat is evidenced by the melting of ice due to an increase in the average global temperature and a reduction in the precipitation of snow.</abstract>
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		<language>pt</language>
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