Regime t?rmico da camada ativa na Pen?nsula Keller, Ilha Rei George, Ant?rtica (2008-2011): contribui??o ao monitoramento de ambientes periglaciais

Detalhes bibliográficos
Autor(a) principal: Salamene, Samara
Data de Publicação: 2013
Tipo de documento: Tese
Idioma: por
Título da fonte: Biblioteca Digital de Teses e Dissertações da UFRRJ
Texto Completo: https://tede.ufrrj.br/jspui/handle/jspui/2766
Resumo: The thermal regime of active layer above the permafrost is an effective indicator of climate change effects in periglacial environments, because soil does interface with atmosphere and terrestrial biota, that justify it monitoring. This study objectived to analyze the active layer thermal regime in six monitoring sites localized on Keller Peninsula, King George Island, Maritime Antarctica. Temperature and moisture sensors were installed at different soil depths, making a continuous data series since February-March/2008 until January-February/2011. Cluster dendrogram was used to an exploratory data analysis of soil temperature in sites. The main feature that defined the groups was the occurrence of thermal isolation caused by snow or vegetation. The active layer thickness and permafrost depth were estimated for each site by regression. Thermal diffusivity through soil profile was estimated using the parameters obtained in model adjustment for soil temperature. Soil properties that influence the diffusivity were organic matter and texture. Soils with more clay or organic matter had a minor thermal diffusivity. Thermal diffusivity increased with soil depth and is related to soil water content. There was a displacement in temperature freezing point of soil water, and this displacement was greater in soils with higher salt content. Time series analysis showed periods of more frequency: annual and intra-annual (seasons). There was a between annual period with significant frequency that can be associated with the South Annular Mode (SAM), climatic mode that occurred in the region during the study period.
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spelling Francelino, M?rcio Rocha825.207.127-91http://lattes.cnpq.br/1335748426615308Lyra, Gustavo BastosSchaefer, Carlos Ernesto Gon?alves ReynaudFernandes Filho, Elp?dio In?cioOliveira Junior, Jos? Francisco deDelgado, Rafael Coll219.047.728-03http://lattes.cnpq.br/3262036650536544Salamene, Samara2019-06-25T16:09:32Z2013-02-26SALAMENE, Samara. Regime t?rmico da camada ativa na Pen?nsula Keller, Ilha Rei George, Ant?rtica (2008-2011): contribui??o ao monitoramento de ambientes periglaciais. 2013. 72 f. Tese (Doutorado em Ci?ncias Ambientais e Florestais) - Instituto de Florestas, Universidade Federal Rural do Rio de Janeiro, Serop?dica, 2013.https://tede.ufrrj.br/jspui/handle/jspui/2766The thermal regime of active layer above the permafrost is an effective indicator of climate change effects in periglacial environments, because soil does interface with atmosphere and terrestrial biota, that justify it monitoring. This study objectived to analyze the active layer thermal regime in six monitoring sites localized on Keller Peninsula, King George Island, Maritime Antarctica. Temperature and moisture sensors were installed at different soil depths, making a continuous data series since February-March/2008 until January-February/2011. Cluster dendrogram was used to an exploratory data analysis of soil temperature in sites. The main feature that defined the groups was the occurrence of thermal isolation caused by snow or vegetation. The active layer thickness and permafrost depth were estimated for each site by regression. Thermal diffusivity through soil profile was estimated using the parameters obtained in model adjustment for soil temperature. Soil properties that influence the diffusivity were organic matter and texture. Soils with more clay or organic matter had a minor thermal diffusivity. Thermal diffusivity increased with soil depth and is related to soil water content. There was a displacement in temperature freezing point of soil water, and this displacement was greater in soils with higher salt content. Time series analysis showed periods of more frequency: annual and intra-annual (seasons). There was a between annual period with significant frequency that can be associated with the South Annular Mode (SAM), climatic mode that occurred in the region during the study period.O regime t?rmico da camada ativa acima do permafrost constitui num eficiente indicador dos efeitos das mudan?as clim?ticas em ambientes periglaciais, uma vez que o solo est? na interface com a atmosfera e diretamente relacionado ? biota terrestre, o que justifica seu monitoramento. O objetivo geral do presente estudo foi analisar o regime t?rmico da camada ativa em seis s?tios de monitoramento da Pen?nsula Keller, na Ilha Rei George, Ant?rtica Mar?tima. Foram instalados sensores de temperatura e de umidade em diferentes profundidades do solo. Obteve-se uma s?rie cont?nua de dados no per?odo de fevereiro/mar?o de 2008 a janeiro/fevereiro de 2011. Foi realizada an?lise explorat?ria dos dados de temperatura do solo, com an?lise de agrupamento dos s?tios. A principal caracter?stica que definiu os grupos foi a ocorr?ncia de isolamento t?rmico ocasionado pela neve ou vegeta??o. A espessura da camada ativa e profundidade do permafrost de cada s?tio foram estimadas por meio de regress?o. A difusividade t?rmica ao longo do perfil de solo foi estimada com os par?metros obtidos no ajuste do modelo de temperatura do solo. Os atributos do solo que influenciaram na difusividade foram mat?ria org?nica e textura. Nos solos mais argilosos ou com maior quantidade de mat?ria org?nica a difusividade t?rmica foi menor. A difusividade t?rmica aumentou com a profundidade do solo e est? relacionada com o conte?do de ?gua do solo. Observou-se um deslocamento na temperatura de congelamento da ?gua no solo, sendo esse deslocamento maior nos solos com maior teor de sais. A an?lise de s?ries temporais mostrou os per?odos de maior frequ?ncia: anual e intra-anual (esta??es do ano). Houve um per?odo interanual com frequ?ncia significativa que pode estar associado ? ocorr?ncia do Modo Clim?tico Anular Sul (SAM) na regi?o durante o per?odo estudado.Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2019-06-25T16:09:32Z No. of bitstreams: 1 2013 - Samara Salamene.pdf: 3735125 bytes, checksum: f33dbe85b62c04d59256b8950b478e01 (MD5)Made available in DSpace on 2019-06-25T16:09:32Z (GMT). No. of bitstreams: 1 2013 - Samara Salamene.pdf: 3735125 bytes, checksum: f33dbe85b62c04d59256b8950b478e01 (MD5) Previous issue date: 2013-02-26Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico, CNPq, Brasilapplication/pdfhttps://tede.ufrrj.br/retrieve/10091/2013%20-%20Samara%20Salamene.pdf.jpghttps://tede.ufrrj.br/retrieve/16378/2013%20-%20Samara%20Salamene.pdf.jpghttps://tede.ufrrj.br/retrieve/22682/2013%20-%20Samara%20Salamene.pdf.jpghttps://tede.ufrrj.br/retrieve/29062/2013%20-%20Samara%20Salamene.pdf.jpghttps://tede.ufrrj.br/retrieve/35414/2013%20-%20Samara%20Salamene.pdf.jpghttps://tede.ufrrj.br/retrieve/41810/2013%20-%20Samara%20Salamene.pdf.jpghttps://tede.ufrrj.br/retrieve/48212/2013%20-%20Samara%20Salamene.pdf.jpghttps://tede.ufrrj.br/retrieve/54664/2013%20-%20Samara%20Salamene.pdf.jpgporUniversidade Federal Rural do Rio de JaneiroPrograma de P?s-Gradua??o em Ci?ncias Ambientais e FlorestaisUFRRJBrasilInstituto de FlorestasALBUQUERQUE-FIHO, M. R. 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dc.title.por.fl_str_mv Regime t?rmico da camada ativa na Pen?nsula Keller, Ilha Rei George, Ant?rtica (2008-2011): contribui??o ao monitoramento de ambientes periglaciais
dc.title.alternative.eng.fl_str_mv Active layer thermal regime in Keller Peninsula, King George Island, Antarctica (2008-2011): contribution to periglacial environments monitoring
title Regime t?rmico da camada ativa na Pen?nsula Keller, Ilha Rei George, Ant?rtica (2008-2011): contribui??o ao monitoramento de ambientes periglaciais
spellingShingle Regime t?rmico da camada ativa na Pen?nsula Keller, Ilha Rei George, Ant?rtica (2008-2011): contribui??o ao monitoramento de ambientes periglaciais
Salamene, Samara
solos
temperatura
umidade
permafrost
soil
temperature
moisture
permafrost
Recursos Florestais e Engenharia Florestal
title_short Regime t?rmico da camada ativa na Pen?nsula Keller, Ilha Rei George, Ant?rtica (2008-2011): contribui??o ao monitoramento de ambientes periglaciais
title_full Regime t?rmico da camada ativa na Pen?nsula Keller, Ilha Rei George, Ant?rtica (2008-2011): contribui??o ao monitoramento de ambientes periglaciais
title_fullStr Regime t?rmico da camada ativa na Pen?nsula Keller, Ilha Rei George, Ant?rtica (2008-2011): contribui??o ao monitoramento de ambientes periglaciais
title_full_unstemmed Regime t?rmico da camada ativa na Pen?nsula Keller, Ilha Rei George, Ant?rtica (2008-2011): contribui??o ao monitoramento de ambientes periglaciais
title_sort Regime t?rmico da camada ativa na Pen?nsula Keller, Ilha Rei George, Ant?rtica (2008-2011): contribui??o ao monitoramento de ambientes periglaciais
author Salamene, Samara
author_facet Salamene, Samara
author_role author
dc.contributor.advisor1.fl_str_mv Francelino, M?rcio Rocha
dc.contributor.advisor1ID.fl_str_mv 825.207.127-91
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/1335748426615308
dc.contributor.advisor-co1.fl_str_mv Lyra, Gustavo Bastos
dc.contributor.referee1.fl_str_mv Schaefer, Carlos Ernesto Gon?alves Reynaud
dc.contributor.referee2.fl_str_mv Fernandes Filho, Elp?dio In?cio
dc.contributor.referee3.fl_str_mv Oliveira Junior, Jos? Francisco de
dc.contributor.referee4.fl_str_mv Delgado, Rafael Coll
dc.contributor.authorID.fl_str_mv 219.047.728-03
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/3262036650536544
dc.contributor.author.fl_str_mv Salamene, Samara
contributor_str_mv Francelino, M?rcio Rocha
Lyra, Gustavo Bastos
Schaefer, Carlos Ernesto Gon?alves Reynaud
Fernandes Filho, Elp?dio In?cio
Oliveira Junior, Jos? Francisco de
Delgado, Rafael Coll
dc.subject.por.fl_str_mv solos
temperatura
umidade
permafrost
topic solos
temperatura
umidade
permafrost
soil
temperature
moisture
permafrost
Recursos Florestais e Engenharia Florestal
dc.subject.eng.fl_str_mv soil
temperature
moisture
permafrost
dc.subject.cnpq.fl_str_mv Recursos Florestais e Engenharia Florestal
description The thermal regime of active layer above the permafrost is an effective indicator of climate change effects in periglacial environments, because soil does interface with atmosphere and terrestrial biota, that justify it monitoring. This study objectived to analyze the active layer thermal regime in six monitoring sites localized on Keller Peninsula, King George Island, Maritime Antarctica. Temperature and moisture sensors were installed at different soil depths, making a continuous data series since February-March/2008 until January-February/2011. Cluster dendrogram was used to an exploratory data analysis of soil temperature in sites. The main feature that defined the groups was the occurrence of thermal isolation caused by snow or vegetation. The active layer thickness and permafrost depth were estimated for each site by regression. Thermal diffusivity through soil profile was estimated using the parameters obtained in model adjustment for soil temperature. Soil properties that influence the diffusivity were organic matter and texture. Soils with more clay or organic matter had a minor thermal diffusivity. Thermal diffusivity increased with soil depth and is related to soil water content. There was a displacement in temperature freezing point of soil water, and this displacement was greater in soils with higher salt content. Time series analysis showed periods of more frequency: annual and intra-annual (seasons). There was a between annual period with significant frequency that can be associated with the South Annular Mode (SAM), climatic mode that occurred in the region during the study period.
publishDate 2013
dc.date.issued.fl_str_mv 2013-02-26
dc.date.accessioned.fl_str_mv 2019-06-25T16:09:32Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/doctoralThesis
format doctoralThesis
status_str publishedVersion
dc.identifier.citation.fl_str_mv SALAMENE, Samara. Regime t?rmico da camada ativa na Pen?nsula Keller, Ilha Rei George, Ant?rtica (2008-2011): contribui??o ao monitoramento de ambientes periglaciais. 2013. 72 f. Tese (Doutorado em Ci?ncias Ambientais e Florestais) - Instituto de Florestas, Universidade Federal Rural do Rio de Janeiro, Serop?dica, 2013.
dc.identifier.uri.fl_str_mv https://tede.ufrrj.br/jspui/handle/jspui/2766
identifier_str_mv SALAMENE, Samara. Regime t?rmico da camada ativa na Pen?nsula Keller, Ilha Rei George, Ant?rtica (2008-2011): contribui??o ao monitoramento de ambientes periglaciais. 2013. 72 f. Tese (Doutorado em Ci?ncias Ambientais e Florestais) - Instituto de Florestas, Universidade Federal Rural do Rio de Janeiro, Serop?dica, 2013.
url https://tede.ufrrj.br/jspui/handle/jspui/2766
dc.language.iso.fl_str_mv por
language por
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Trends in the Southern Annular Mode from Observations and Reanalyses. Journal of Climate, v. 16, p. 4134-4143. 2003. MORETTIN, P.A. & TOLOI, C.M. An?lise de S?ries Temporais. S?o Paulo: Edgard Blucher, 2005. 564p. RAMOS, M; VIEIRA, G; GRUBER, S; BLANCO, J J; HAUCK, C; HIDALGO, M ; TOME, D; NEVES, M; TRINDADE, A. Islands, D. Permafrost and active layer monitoring in the maritime Antarctic: preliminary results from CALM sites on Livingston and Deception Islands. U.S. Geological Survey and The National Academies; USGS OF-2007-1047, Short Research Paper 070, doi:10.3133/of2007-1047.srp070. 2007. 56 VIEIRA, G.; BOCKHEIM, J.; GUGLIELMIN, M. et al. Thermal State of Permafrost and Active-layer Monitoring in the Antarctic: Advances During the International Polar Year 2007 ? 2009. Permafrost and Periglacial Process, v. 21, p. 182?197, 2010. WILKS, D.S. Statistical Methods in the Atmospheric Sciences. 2a ed. New York: Academic Press, 2006. 627p.
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