Sobre el calentamiento global en la isla Rey Jorge: procesos y evidencias en el Glaciar Wanda y su entorno

• Main Authors: Ferrando Acuña, Francisco José, Vieira, Rosemary, Kellem da Rosa, Kátia
• Format: Article in Journal/Newspaper
• Language: Spanish
• Published: Universidad de Chile. Facultad de Arquitectura y Urbanismo 2009
• Subjects: Glaciological dynamic; warming; rain; plant fossils; actual vegetation; volcanic context; hydrodynamic response; melting; lagoons; Glaciodinámica; calentamiento; lluvias; fósiles vegetales; vegetación actual; contexto volcánico; repuesta hidrodinámica; consunción; lagunas; Almirantazgo; ensenada Martel; Fósiles; Isla Rey Jorge; King George Island; Martel; Martel Inlet; Rey Jorge; Wanda Glacier; Antártica
• Online Access: https://revistas.uchile.cl/index.php/IG/article/view/21889

Geologic, geomorphologic and volcanic aspects, meteorological data and vegetation, both fossil and current, are considered in order to find answers to the dynamics of King George Island glaciers, into theSouth Shetlands Islands, with special emphasis on aspects of the glaciological dynamics submitted by Wanda glacier located in Martel inlet, Almirantazgo Sound, as well as by relevant aspects shown by theEcology glacier, located at the neighborhood. Glaciological and geomorphologic field analysis carried out, the morphological results of glacial sediments samples at laboratory, plant fossils kds, as well asthe interpretation of volcanic history of the Península Antártica, joint with volcanic residual forms and piroclastic materials, also the direct experience of rain over ice, the hydrological responses generated, and the development of not pioneer plants, among other elements, reveal a complex island glaciological evolution. So, temperature rate increasing and the occurrence of rain in a significant number of days per year, scenery that seems not new in the past of the island, and the possible influence of latent heat derived fiom the volcanic context means in the case of Wanda glacier clear negative effects on his mass balance, registering from clear evidence of Cont retreat to moments of accelerated melting and generation of small torrents and lagoons, some of them with persistent character discontinuously damrned by Cont moraines at the coast, as weii as other of seasondy formed into the glacial environment. Se analizan antecedentes geológicos, volcánicos, meteorológicos y vegetacionales, tanto fósiles como actuales, con el objeto de encontrar respuestas a la dinámica de los glaciares de la isla Rey Jorge, Archipiélago de las Shetlands del Sur, con especial énfasis en los aspectos de la dinámica glaciológica presentados por el Glaciar Wanda, ubicado en la Ensenada Martel, Seno Almirantazgo, así como por aspectos relevantes evidenciados en el Glaciar Ecology, localizado dentro del mismo Seno. Los análisis ...