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Climate change and increase of vegetation in the Fildes Peninsula, Antarctica

Authors

  • Carina Petsch Departamento de Geociências, Universidade Federal de Santa Maria, Santa María, Brasil/ Centro Polar e Climático, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil. http://orcid.org/0000-0002-1079-0080
  • Maria Eliza Sotille Centro Polar e Climático, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil. http://orcid.org/0000-0002-2965-8004
  • Rafaela Mattos Costa Centro Polar e Climático, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil.
  • Katia Kellem da Rosa Centro Polar e Climático, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil. http://orcid.org/0000-0003-0977-9658
  • Jefferson Cardia Simões Centro Polar e Climático, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil. http://orcid.org/0000-0001-5555-3401
No. 57 (2019)
https://doi.org/10.5354/0719-5370.2019.52147

Abstract

The objective of the article is to evaluate the variation of area and location of mosses in the Fildes Peninsula, Antarctica, using the NDVI technique and LANDSAT images, for the period 1986-2016, in the face of climate change scenarios. The NDVI technique was applied on 7 LANDSAT images and the products were evaluated by the Kappa index. The vegetation area increased from 1.5 to 2.7 km² in the period. The Kappa index results indicatevariations with 0,81 to 0,93 accuracy, more than 70% of the mapped area were indicated above 0.1 (most likely vegetation area). The largest mosses fields (83% of the larger ones) are located in the part facing the Drake Passage and are associated to the moisture and wind coming from the ocean. The greatest amount of organic matter and floodwaters occur in the “U” valleys facing the Drake, contributing to the vegetation fixation. The mosses fields will continue to increase in the face of scenarios point to increasing mean air temperature and retraction of the local Collins glacier and, consequently, an increase in the availability of liquid water and sediments in the proglacial and periglacial environment.

Keywords:

Fildes Peninsula, Mosses fields, NDVI

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How to Cite
Petsch, C., Sotille, M. E., Mattos Costa, R., Rosa, K. K. da, & Cardia Simões, J. (2019). Climate change and increase of vegetation in the Fildes Peninsula, Antarctica. Investigaciones Geográficas, (57). https://doi.org/10.5354/0719-5370.2019.52147
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Investigaciones Geográficas
Facultad de Arquitectura y Urbanismo
Universidad de Chile
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