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The impact of tropical sea surface temperature perturbations on atmospheric circulation over north Canada and GreenlandMcCrystall, Michelle Roisin January 2018 (has links)
Identifying the drivers of Arctic climate variability is essential for understanding the recent rapid changes in local climate and determining the mechanisms that cause them. Remote tropical sea surface temperatures (SST) have been identified in previous studies as having contributed to the recent positive trends in surface temperature and geopotential height at 200 hPa over north Canada and Greenland (1979-2012) through poleward propagating Rossby waves. However, the source and direction of wave propagation on to north Canada and Greenland (NCG) differs across climate datasets indicating that there are still uncertainties surrounding the mechanisms for how the tropics influence the NCG climate. This thesis aims to further investigate the robustness of the trends over NCG and understand how circulation in this region responds to imposed tropical SST perturbations. The eddy 200 hPa geopotential height (Z200) trends over NCG are assessed in a number of different datasets and compared to the response of eddy Z200 over NCG to imposed tropical SST perturbations in a number of sensitivity studies using the HadGEM3 atmosphere-only model. These model experiments are forced with observed differences in SSTs from the beginning and end of the satellite record (1979-1988 and 2003-2012), with spatial perturbations for [i] the entire tropics, [ii] global SSTs, [iii] the tropical Pacific only, [iv] the tropical Atlantic SST only, [v] the tropical Indian Ocean only. The positive spatial trends of eddy Z200 over NCG from ERA-Interim reanalysis is largely captured in ensemble means of two available climate datasets, UPSCALE and AMIP, indicating that this is a robust climate pattern, however, these trends appear to be stronger in the latter part of the record specifically over the UPSCALE period (1985 to 2011). The model sensitivity studies show that a negative eddy Z200 anomaly over NCG was found in response to all imposed tropical SST perturbations (2003-2012) relative to a background state (1979-1988). This was due a stationary trough over the region that was able to intensify in response to a lack of a strong anomalous wave forcing from changes in mid-tropospheric temperature and zonal winds. The forcing from the tropical Atlantic, relative to the other tropical ocean basins, resulted in the largest eddy Z200 response over NCG, indicating its dominance in forcing the large scale tropical signal. The influence of extratropical SST perturbations relative to tropical SST perturbations were also investigated and it was demonstrated that this negative anomaly is largely driven by the change in tropical sea surface temperatures.
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Essas pessoas na sala de jantar : espa?os hist?ricos em can??es tropicalistas (1963-1973)Andrade, Enzio Gercione Soares de 22 November 2011 (has links)
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Previous issue date: 2011-11-22 / Tropicalia concerns the attempt of understanding of Brazil and a national identity
characterized by the transience of time and space, rhizomatic action, perpetual laceration of
cultural boundaries and at the same time act synchronously to instances such as policy and the
social. A word created by artist H?lio Oiticica and registered by him on the National Register
of Trademarks and Patents, was later used to a name the eponymous song by Caetano Veloso
and also in this fertile cultural impulse at the turn of the sixties to the seventies on last
century, who had the intention to make creating new spaces and simultaneously rethink the
spatial cuts of Brazilian culture, encouraging them to be much more than a myth of a paradise
within a lush new look of a tropical truth. / Tropic?lia diz respeito ? tentativa de compreens?o do Brasil e de uma identidade nacional
caracterizada pela transitoriedade de tempos e espa?os, de a??o rizom?tica, de um perp?tuo
esgar?amento de fronteiras culturais e que ao mesmo instante age de forma sincr?nica a
inst?ncias como a da pol?tica e ao do social. A palavra criada pelo artista pl?stico H?lio
Oiticica e por ele registrada no registro nacional de marcas e patentes a posteriori, foi usada
para nomear a can??o hom?nima de Caetano Veloso e tamb?m a esse f?rtil impulso cultural
na virada da d?cada de sessenta para os anos setenta, que teve a pretens?o de formular novos
espa?os de cria??o e simultaneamente repensar os recortes espaciais da cultura brasileira,
instigando-os a serem bem mais que um mito de um para?so verdejante dentro de uma nova
mirada de uma verdade tropical.
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[pt] ALÉM-MAR AVENTURA E ROTINA: O LUGAR DO BRASIL NO MUNDO LUSO-TROPICAL DE GILBERTO FREYRE / [en] BEYOND-SEA ADVENTURE AND ROUTINE:THE PLACE OF BRAZIL IN THE LUSO-TROPICAL WORLD IN THE GILBERTO FREYRERACHEL DE REZENDE MIRANDA 07 August 2003 (has links)
[pt] Gilberto Freyre é um dos principais autores do pensamento
social brasileiro.Com a primeira fase de sua obra, (até)
os anos 1930, ele inaugura uma nova maneira de se pensar
a mestiçagem e a questão racial no Brasil. Sua extensa
produção intelectual é a continuação e o desenvolvimento
de seu livro fundador, Casa-Grande & Senzala. Esta
dissertação é uma análise de Aventura e Rotina, livro de
uma fase crucial no amadurecimento do conceito de
mestiçagem freyreano: o luso-tropicalismo. Neste período,
que vai de 1940 a 1960, Gilberto Freyre estende a idéia
da singularidade brasileira a um macro-cosmo, o mundo
luso-tropical, que compreenderia Portugal e todas as suas
colônias e ex-colônias. / [en] Gilberto Freyre is one of the most important authors of the
Brazilian social thinking. As the first phase of his oeuvre
ends, in the 1930's, he establishes a new way of thinking,
regarding racial mixing and racial issues in Brazil. His
extense intellectual production is the continuation and
development of his seminal book Casa-Grande & Senzala.
This dissertation is an analysis of Aventura e Rotina, a
book from a crucial phase on the establishment of the
concept of - freyrean racial mixing -: the luso-
tropicalism. In this period, from 1940 until 1960, Gilberto
Freyre extends the idea of a Brazilian singularity to a
macro-cosmos, known as the - luso-tropical world -, which
would contain Portugal and all its colonies and ex-colonies.
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Psaný hlas: Whitmanovy Listy trávy (1855) a Millerův Obratník Raka / Written Voice: Whitman's Leaves of Grass (1855) and Miller's Tropic of CancerSkovajsa, Ondřej January 2014 (has links)
The PhD. dissertation Written Voice examines how Walt Whitman and Henry Miller through books, confined textual products of modernity, strive to awaken the reader to a more perceptive and courageous life, provided that the reader is willing to suspend hermeneutics of suspicion and approach Leaves of Grass and Tropic of Cancer with hermeneutics of hunger. This is examined from linguistic, anthropological and theological vantage point of oral theory (M. Jousse, M. Parry, A. Lord, W. Ong, E. Havelock, J. Assmann, D. Abram, C. Geertz, T. Pettitt, J. Nohrnberg, D. Sölle, etc.). This work thus compares Leaves (1855) and Tropic of Cancer examining their paratextual, stylistic features, their genesis, the phenomenology of their I's, their ethos and story across the compositions. By "voluntary" usage of means of oral mnemonics such as parallelism/bilateralism (Jousse) - along with present tense, imitatio Christi and pedagogical usage of obscenity - both authors in their compositions attack the textual modern discourse, the posteriority, nostalgia and confinement of literature, restore the body, and aim for futurality of biblical kinetics. It is the reader's task, then, to hermeneutically resurrect the dead printed words of the compositions into their own "flesh" and action. The third part of the thesis...
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