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dc.contributor.advisor Sifeddine, Abdelfettah
dc.contributor.advisor William da Cruz, Francisco
dc.contributor.author Apaéstegui Campos, James Emiliano
dc.date.accessioned 2018-10-29T13:40:45Z
dc.date.available 2018-10-29T13:40:45Z
dc.date.issued 2014
dc.identifier.citation Apaéstegui, J. E. (2014).==$Monção Sul Americana: Variabilidades e impactos na paleopluviosidade dos Andes orientais durante os últimos 1400 anos a partir de estudos isotópicos em espeleotemas$==(Tese de Doutorado em Geoquímica Ambiental). Universidade Federal Fluminense, Niterói, Brasil. es_ES
dc.identifier.uri http://repositorio.igp.gob.pe/handle/IGP/3183
dc.description.abstract The caves located in the Peruvian and Bolivian Andes are characterized by the presence of speleothems providing high potential for high resolution paleoclimate and paleohydrologicall reconstructions, which allow understand principally short periods of climate variability. These variability during the last millennium have been widely studied, mainly in correspondance to important recent weather events such as Medieval Climate Anomaly (MCA, AD 900 1200) and the Little Ice Age (LIA - 1400-1850 AD), which were associated to changes in solar and volcanic activities in the Northern Hemisphere. In this work, we used stable oxygen isotopes (δ 18O) in speleothems as a proxy for assessing the stages of change of sources and precipitation intensity related to changes in the activities of the South American Monsoon System. 5 espeleotems were analyzed; 2 in Palestina cave (Peru) and 3 in Chiflonkhakha cave (Bolivia). Our results show changes in δ 18O values suggesting dry conditions in Peru and humid conditions in Bolivia during ACM evidenced by more positive and negative values respectively. Later, during the LIA, results show more negative δ 18O values indicating more humid conditions in both regions. Analysis of frequencies over the studied records showed periodicities around 8, 25 and 64 years. These variations were correlated to ACM and LIA with other paleoclimatic reconstructions in marine and continental areas, in order to understand the influence of the zonal and latitudinal variability of ocean surface temperatures (SSTs) in the Equatorial Pacific and the Atlantic Ocean and it´s influence on distribution of rainfall in relation to the South American Monsoon. es_ES
dc.description.uri Tesis es_ES
dc.format application/pdf es_ES
dc.language.iso por es_ES
dc.publisher Universidade Federal Fluminense
dc.rights info:eu-repo/semantics/openAccess es_ES
dc.rights.uri http://creativecommons.org/licences/by-nc-nd/2.5/pe/
dc.source Repositorio institucional - IGP es_ES
dc.subject Variaciones estacionales es_ES
dc.subject Espeleotemas es_ES
dc.subject Isótopos estables es_ES
dc.subject Paleoclimatología--Perú es_ES
dc.subject Paleoclimatología--Bolivia es_ES
dc.subject Monzones es_ES
dc.subject Andes--Geología es_ES
dc.subject Cuevas--Perú es_ES
dc.subject Cuevas--Bolivia es_ES
dc.title Monção Sul Americana: Variabilidades e impactos na paleopluviosidade dos Andes orientais durante os últimos 1400 anos a partir de estudos isotópicos em espeleotemas es_ES
dc.type info:eu-repo/semantics/doctoralThesis es_ES
dc.subject.ocde Tesis es_ES
dc.subject.ocde Climatología es_ES
dc.subject.ocde Bolivia es_ES
dc.subject.ocde Geoquímica es_ES
dc.subject.ocde Perú es_ES
dc.subject.ocde Estudios de suelos es_ES
dc.subject.ocde Química de suelos es_ES
dc.subject.ocde Estudios geológicos es_ES
dc.subject.ocde Mecánica de suelos es_ES
thesis.degree.name Doutorado em Geociências es_ES
thesis.degree.grantor Universidade Federal Fluminense. Instituto de Química, Programa de Pós-Graduação en Geociências - Geoquímica es_ES
thesis.degree.level Doctorado es_ES
thesis.degree.discipline Geoquímica es_ES

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