Variations in Ocean Mixing from Seconds to Years

Over the past several decades, there has developed a community-wide appreciation for the importance of mixing at the smallest scales to geophysical fluid dynamics on all scales. This appreciation has spawned greater participation in the investigation of ocean mixing and new ways to measure it. These are welcome developments given the tremendous separation in scales between the basins, [Formula: see text]) m, and the turbulence, [Formula: see text]) m, and the fact that turbulence that leads to thermodynamically irreversible mixing in high-Reynolds-number geophysical flows varies by at least eight orders of magnitude in both space and time. In many cases, it is difficult to separate the dependencies because measurements are sparse, also in both space and time. Comprehensive shipboard turbulence profiling experiments supplemented by Doppler sonar current measurements provide detailed observations of the evolution of the vertical structure of upper-ocean turbulence on timescales of minutes to weeks. Recent technical developments now permit measurements of turbulence in the ocean, at least at a few locations, for extended periods. This review summarizes recent and classic results in the context of our expanding knowledge of the temporal variability of ocean mixing, beginning with a discussion of the timescales of the turbulence itself (seconds to minutes) and how turbulence-enhanced mixing varies over hours, days, tidal cycles, monsoons, seasons, and El Niño–Southern Oscillation timescales (years).

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IMPACT OF MEMENTO VALUE ON THE PERCEPTION OF CULTURAL HERITAGE: CASE STUDY OF THE MODERN MOVEMENT AND DIALECT OF KAUNAS / ATMINTIES VERTĖ SUVOKIANT KULTŪROS PAVELDĄ: MODERNIZMO JUDĖJIMO IR JO KAUNIETIŠKOJO DIALEKTO ATVEJO TYRIMAS

Mokslas - Lietuvos ateitis ◽

10.3846/mla.2018.1064 ◽

2018 ◽

Vol 10 (0) ◽

pp. 1-7

Author(s):

Huriye Armagan DOGAN

Keyword(s):

Built Environment ◽

Cultural Heritage ◽

Empirical Approach ◽

The Past ◽

Space And Time ◽

The Impact ◽

Modern Movement

Memento value in heritage is one of the most essential characteristics facilitating the association between the environment and its users, by connecting structures with space and time, moreover, it helps people to identify their surroundings. However, the emergence of the Modern Movement in the architectural sphere disrupted the reflection of memory and symbols which serve to root the society in its language. Furthermore, it generated an approach that stood against the practice of referring to the past and tradition, which led to the built environment becoming homogeneous and deprived of memento value. This paper focuses on the impact of memento value on the perception and evaluation of cultural heritage. Furthermore, it investigates the notions which are perceived to influence the appraisal of cultural heritage by applying them to the Kaunas dialect of the Modern Movement with an empirical approach.

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ESTRUTURA E DINÂMICA EM UMA FLORESTA DENSA DE TERRA FIRME, SUDESTE DO AMAPÁ, BRASIL

Nativa ◽

10.31413/nativa.v6i0.5755 ◽

2018 ◽

Vol 6 ◽

pp. 802

Author(s):

Ronaldo Oliveira dos Santos ◽

Rubiene Neto Soares ◽

Bruno Costa do Rosário ◽

Robson Borges de Lima ◽

Jadson Coelho de Abreu

Keyword(s):

Vertical Structure ◽

Ecological Groups ◽

Terra Firme ◽

The Past ◽

Structure And Dynamics ◽

Major Species ◽

Diameter Structure ◽

Terra Firme Forest ◽

Number Of Individuals ◽

Late Stages

O objetivo deste estudo foi analisar a variação da estrutura diamétrica de uma comunidade arbórea em floresta densa de terra firme e dos principais grupos de espécies de estágios iniciais e tardios de sucessão, bem como caracterizar a estrutura vertical da floresta. Em 2016, foram inventariadas todas as árvores com DAP ≥ 10 cm e mensuradas suas alturas. Em 2017, as árvores foram reamostradas. A estrutura diamétrica foi analisada por meio do quociente “q” De Liocourt para: a comunidade, principais espécies de maior VI e os grupos ecológicos (GE). A análise da estrutura vertical da vegetação foi feita pela distribuição do número de árvores nos estratos, utilizando-se três métodos: (I) – Sanquetta (1995), (II) - Souza (1990), e (III) – Souza et al. (2003). A estrutura diamétrica da comunidade e dos GE no período avaliado foi caracterizada por árvores de pequeno porte nas menores classes de diâmetro. O Método II não trouxe bons resultados sobre o comportamento das espécies no estrato médio por apresentar fortes tendências em concentrar um maior número de indivíduos nesse estrato. Os resultados da estrutura altimétrica e diamétrica demonstraram indicativos que a exploração antrópica no passado alterou a estrutura da floresta.Palavras-chave: espécies amazônicas, “q” De Licocourt, estratificação, incremento. STRUCTURE AND DYNAMICS IN A DENSE OF TERRA FIRME FOREST, SOUTHEAST OF AMAPÁ, BRAZIL ABSTRACT:The study aimed to analyze the variation of the diameter structure of a arboreal community in a dense terra firme forest and the main groups of species of early and late stages of succession, as well as characterize the vertical structure of the forest. In 2016, all trees with DBH ≥ 10 cm were inventoried and their heights measured indirectly. In 2017, the trees were re-measured. The diametric structure was analyzed using the "q" De Liocourt quotient for: the community, major species of higher (VI) and ecological groups (EG). The analysis of the vertical structure of the vegetation was made by the distribution of the number of trees in the strata, using three methods: (I) – Sanquetta (1995), (II) - Souza (1990), and (III) – Souza et al. (2003). The diametric structure of the community and the EG during the period evaluated was characterized by small trees in the smallest diameter classes. Method II did not bring good results on the behavior of the species in the middle stratum because it presents strong tendencies to concentrate a greater number of individuals in this stratum. The results of the altimetric and diametric structure have demonstrated that antropic exploration in the past has altered the structure of the forest.Keywords: amazonian species, “q” De Licocourt, stratification, increment.

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QUESTÕES TEÓRICAS E TENDÊNCIAS DA GEOGRAFIA HISTÓRICA

GEOgraphia ◽

10.22409/geographia2018.v20i42.a13830 ◽

2018 ◽

Vol 20 (42) ◽

pp. 25

Author(s):

Patrício Aureliano Silva Carneiro

Keyword(s):

Present Article ◽

Historical Geography ◽

Time History ◽

Anglo Saxon ◽

Spatial Processes ◽

The Past ◽

Space And Time

Resumo: Um dos grandes desafios dos estudos históricos reside na incorporação e análise dos processos espaciais e dos elementos territoriais responsáveis por influenciar as temporalidades e os eventos e por modelar e organizar o espaço no passado. No presente artigo, procuramos salientar a importância dessa articulação, discorrendo sobre as inter-relações entre as categorias tempo e espaço, história e geografia. Com base em bibliografia anglo-saxônica, revisamos os aspectos conceituais da geografia histórica, a contribuição dos principais estudiosos e as novas tendências e desafios desse plano de abordagem.Palavras-chave: Geografia e história. Geografia histórica. Teoria e metodologia. THEORY AND TRENDS OF HISTORICAL GEOGRAPHYAbstract: One of the most significant challenges in the historical studies lies in the incorporation and analysis of spatial processes and territorial elements which influence temporality and events, as well as fashion and organize space in the past. The present article aims at emphasizing the importance of such relation as well as the connections between space and time, history and geography. Based on Anglo-Saxon bibliography, we review the conceptual aspects of historical geography, the most prominent authors’ contributions along with the new trends and challenges of this approach plan.Keywords: Geography and History. Historical Geography. Theory and Methodology. QUESTIONS THÉORIQUES ET TENDANCES DE LA GÉOGRAPHIE HISTORIQUERésumé: L’un des grands défis des études historiques, réside, dans l’incorporation et l’analyse des processus spatiaux et des éléments territoriaux responsables d’influencer les temporalités et les événements, et de modéliser et organiser l’espace dans le passé. Dans cet article, nous essayons de souligner l’importance de cette articulation, en discutant les interrelations entre le temps et l’espace, l’histoire et la géographie. Sur la base de la bibliographie anglo-saxonne, nous passons en revue les aspects conceptuels de la géographie historique, la contribution des principaux chercheurs et les nouvelles tendances et défis de ce plan d’approche.Mots-clés: Géographie et histoire. Géographie historique. Théorie et méthodologie.

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Becoming Palestine

10.1215/9781478022138 ◽

2021 ◽

Author(s):

Gil Z. Hochberg

Keyword(s):

The Past ◽

Space And Time ◽

Hidden Knowledge ◽

Musical Traditions

In Becoming Palestine, Gil Z. Hochberg examines how contemporary Palestinian artists, filmmakers, dancers, and activists use the archive in order to radically imagine Palestine's future. She shows how artists such as Jumana Manna, Kamal Aljafari, Larissa Sansour, Farah Saleh, Basel Abbas, and Ruanne Abou-Rahme reimagine the archive, approaching it not through the desire to unearth hidden knowledge, but to sever the identification of the archive with the past. In their use of archaeology, musical traditions, and archival film and cinematic footage, these artists imagine a Palestinian future unbounded from colonial space and time. By urging readers to think about archives as a break from history rather than as history's repository, Hochberg presents a fundamental reconceptualization of the archive's liberatory potential.

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Hamlet and the People “Who Know Things”

The Cambridge Journal of Postcolonial Literary Inquiry ◽

10.1017/pli.2020.12 ◽

2020 ◽

Vol 7 (3) ◽

pp. 238-246

Author(s):

Uzoma Esonwanne

Keyword(s):

Cultural Space ◽

Pedagogical Strategy ◽

The Past ◽

Space And Time ◽

The People ◽

Critical Understanding

Is Shakespeare universal? Is Hamlet a “strong” text that generates the same interpretation across cultural space and time, or is it a malleable text whose meaning is contingent upon variables in the encounter between text and reader and the contexts of reading? These were the kinds of questions that my students and I addressed in several courses I taught on Shakespeare over the past four years. As one might expect, our answers differed. Here, I develop and refine the argument I made and, sometimes, made incoherently: universality, whether in a writer, a text, or in criticism “is neither natural nor self-evident.” Because part of my reason for turning to Shakespeare was my dissatisfaction with contrapuntal reading as a pedagogical strategy for cultivating a “critical understanding of imperialism” in students, I conclude that we can only achieve that goal if we deploy contrapuntal reading across the literary curriculum.

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Teleconnections and relationship between the El Niño–Southern Oscillation (ENSO) and the Southern Annular Mode (SAM) in reconstructions and models over the past millennium

Climate of the Past ◽

10.5194/cp-16-743-2020 ◽

2020 ◽

Vol 16 (2) ◽

pp. 743-756 ◽

Cited By ~ 3

Author(s):

Christoph Dätwyler ◽

Martin Grosjean ◽

Nathan J. Steiger ◽

Raphael Neukom

Keyword(s):

Climate Model ◽

El Nino ◽

Southern Oscillation ◽

Southern Annular Mode ◽

Last Millennium ◽

Annular Mode ◽

Model Simulations ◽

The Past ◽

Climate Model Simulations ◽

Past Millennium

Abstract. The climate of the Southern Hemisphere (SH) is strongly influenced by variations in the El Niño–Southern Oscillation (ENSO) and the Southern Annular Mode (SAM). Because of the limited length of instrumental records in most parts of the SH, very little is known about the relationship between these two key modes of variability over time. Using proxy-based reconstructions and last-millennium climate model simulations, we find that ENSO and SAM indices are mostly negatively correlated over the past millennium. Pseudo-proxy experiments indicate that currently available proxy records are able to reliably capture ENSO–SAM relationships back to at least 1600 CE. Palaeoclimate reconstructions show mostly negative correlations back to about 1400 CE. An ensemble of last-millennium climate model simulations confirms this negative correlation, showing a stable correlation of approximately −0.3. Despite this generally negative relationship we do find intermittent periods of positive ENSO–SAM correlations in individual model simulations and in the palaeoclimate reconstructions. We do not find evidence that these relationship fluctuations are caused by exogenous forcing nor by a consistent climate pattern. However, we do find evidence that strong negative correlations are associated with strong positive (negative) anomalies in the Interdecadal Pacific Oscillation and the Amundsen Sea Low during periods when SAM and ENSO indices are of opposite (equal) sign.

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Extended ENSO Predictions Using a Fully Coupled Ocean–Atmosphere Model

Journal of Climate ◽

10.1175/2007jcli1412.1 ◽

2008 ◽

Vol 21 (1) ◽

pp. 84-93 ◽

Cited By ~ 159

Author(s):

Jing-Jia Luo ◽

Sebastien Masson ◽

Swadhin K. Behera ◽

Toshio Yamagata

Keyword(s):

El Niño ◽

General Circulation ◽

El Nino ◽

Southern Oscillation ◽

Global Ocean ◽

Enso Events ◽

The Past ◽

Ocean Atmosphere ◽

First Time ◽

Fully Coupled

Abstract Using a fully coupled global ocean–atmosphere general circulation model assimilating only sea surface temperature, the authors found for the first time that several El Niño–Southern Oscillation (ENSO) events over the past two decades can be predicted at lead times of up to 2 yr. The El Niño condition in the 1997/98 winter can be predicted to some extent up to about a 1½-yr lead but with a weak intensity and large phase delay in the prediction of the onset of this exceptionally strong event. This is attributed to the influence of active and intensive stochastic westerly wind bursts during late 1996 to mid-1997, which are generally unpredictable at seasonal time scales. The cold signals in the 1984/85 and 1999/2000 winters during the peak phases of the past two long-lasting La Niña events are predicted well up to a 2-yr lead. Amazingly, the mild El Niño–like event of 2002/03 is also predicted well up to a 2-yr lead, suggesting a link between the prolonged El Niño and the tropical Pacific decadal variability. Seasonal climate anomalies over vast parts of the globe during specific ENSO years are also realistically predicted up to a 2-yr lead for the first time.

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Relationship between the Southern Oscillation Index and Australian sugarcane yields

Australian Journal of Agricultural Research ◽

10.1071/ar9941557 ◽

1994 ◽

Vol 45 (7) ◽

pp. 1557 ◽

Cited By ~ 13

Author(s):

I Kuhnel

Keyword(s):

Southern Hemisphere ◽

Southern Oscillation Index ◽

Southern Oscillation ◽

Significance Testing ◽

The Past ◽

Northern Areas ◽

Eastern Australia ◽

North Eastern ◽

Sugarcane Yield ◽

The Relationship

This study examines the relationship between the Southern Oscillation Index and the sugarcane yield anomalies at 27 mills in north-eastern Australia (Queensland) for the period 1950-1989. The major results of this work indicate that the SO1 alone seems to have only a limited value as predictor of total sugarcane yields over large areas (i.e. the whole of Queensland). However, on a smaller scale, the SO1 appears to be a useful indicator of yields for the northern sugarcane districts. In these northern areas, the highest correlations with the SO1 are reached during the southern hemisphere spring and summer months 6 to 11 months prior to the harvest. They are negative and explain about 40% of the total variance. They also suggest that a positive SO1 during the spring and summer months tends to be followed by lower-than-normal yields at the following harvest and vice versa. This signal is rather robust and withstands rigorous significance testing. Moreover, it appears that the relationship between the SO1 and the sugarcane yields has been relatively strong and stable for the past 40 years, but weakened substantially during the 1930-1940 period.

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THE GREAT AND THE GRAND: THE ROLES OF GREAT-GRANDPARENTS AND GRANDPARENTS IN MULTIGENERATIONAL FAMILIES

Innovation in Aging ◽

10.1093/geroni/igz038.1047 ◽

2019 ◽

Vol 3 (Supplement_1) ◽

pp. S283-S284

Author(s):

Emily Schuler ◽

Cristina Maria de Souza Brito Dias

Keyword(s):

Content Analysis ◽

Vertical Structure ◽

Human Aging ◽

Thematic Content Analysis ◽

Multigenerational Families ◽

The Past ◽

The Family ◽

Two Generations ◽

The One

Abstract The increase of Human Aging has been observed rapidly in the whole world, as it has been in Brazil allowing the experience to live several roles within the family for a longer time. As a consequence, more multigenerational families emerge with a more vertical structure, formed by four or even five generations. While the oldest generation adds another generational role to their life, the one of great-grandparents, the youngest generation is born into an intergenerational network of relationships. There are various questions about the differences in the role of great-grandparents and grandparents, which motivated this present study. Thus, the objective of this study was to understand the roles of great-grandparents and grandparents in the family and their intergenerational repercussions. Four families with for generations, totaling 16 participants. One member of each generation was interviewed, using a specific script, which was afterwards analyzed by the Thematic Content Analysis. The results pointed out that both great-grandparents and grandparents have distinct roles that are constructed around the needs of the family; both figures provide emotional and material support to the family; both roles have transgenerational importance in the transmission of family legacies, which are related to faith, solidarity, education and order. It can also be said that the great-grandparents can be compared to the grandparents of the past, as the grandparents can be assimilated to the parents of older days. It is hoped that this research contributes to the visibility of these two generations and to sensitize professionals about this theme.

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