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Dissertations / Theses on the topic 'Multi-proxy analyses'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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1

Haghani, Safiyeh. "Evolution of the Sefidrud Delta (south west Caspian Sea) during the last millennium." Thesis, Brunel University, 2015. http://bura.brunel.ac.uk/handle/2438/13779.

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The Sefidrud has developed a large delta in the south west of the Caspian Sea. Its delta is characterized by rapid sedimentation rate (20 mm/yr) in the delta plain and low sedimentation rate (1.67 mm/yr) in a very steep delta front. Sefidrud Delta evolution depends upon sediment supply by river and longshore current under rapid Caspian Sea Level (CSL) fluctuation and tectonic setting at the point of entry to the basin. The tectonic setting caused a very steep slope in the delta front. Sediment supply is variable and affected by river avulsion and dam construction. The CSL has undergone signifi

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2

Bulian, Francesca. "A multi-proxy analysis of a Wadden Sea core (East Frisia, Germany)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14649/.

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Le zone umide costiere, composte da salt marsh, piane tidali, dune e spiagge, appartengono agli habitat più dinamici della Terra su scale geologiche anche brevi. Studi multi-proxy svolti su tali depositi rappresentano le basi per l’interpretazione di ambienti deposizionali Olocenici e per la ricostruzione delle variazioni del livello del mare lungo le coste settentrionali del Mare del Nord. L’area del mare di Wadden (Mare del Nord settentrionale, costa della Frisia orientale, Germania), rappresenta un esempio perfetto di tali ambienti e di conseguenza, è stato un settore largamente studiato

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3

White-Koning, Mélanie. "The quality of life of children with cerebral palsy : analyses on a multi-centre european study." Toulouse 3, 2007. http://www.theses.fr/2007TOU30057.

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Ce travail concerne la qualité de vie (QdV) d'enfants de 8-12 ans atteints de paralysie cérébrale (CP) vivant dans neuf régions européennes. Des régressions multiniveaux et des modèles à équations structurelles ont été utilisés. Nous avons montré que les enfants avec une déficience intellectuelle associée pouvaient évaluer eux-mêmes leur QdV grâce à des questionnaires adaptés et une évaluation préalable de leur capacité à les utiliser. Cependant, le recours à un tiers demeure nécessaire pour ceux qui ont des déficiences très sévères. La sévérité des déficiences n'était pas toujours associée à

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4

Beaudoin, Anne. "Reconstitution paléoenvironnementale de la région du lac Nettilling, (Nunavut) : une analyse multi-proxy." Thesis, Université Laval, 2014. http://www.theses.ulaval.ca/2014/30317/30317.pdf.

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L’Arctique canadien est affecté par des changements rapides de ses écosystèmes naturels depuis plusieurs années. Dans le but d’accroître nos connaissances sur la variabilité climatique de la région du lac Nettilling (Nunavut), l’objectif du projet est de reconstruire les conditions climatiques passées afin de prévoir les impacts des changements futurs en utilisant une approche « multi-proxy » basée sur des paramètres physiques, chimiques et biologiques de carottes de sédiment lacustre. Des carottes sédimentaires lacustres ont été prélevées dans une baie au nord-est du lac Nettilling. Ce site

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5

Taylor, Sam. "Reconstructing Historical Vegetation Cover in Otago, New Zealand, Using Multi-proxy Analysis of Peat Cores." Thesis, University of Canterbury. Geological Sciences, 2010. http://hdl.handle.net/10092/4206.

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This research has examined the historical vegetation of two Eastern Otago sites below the regional treeline, with the aim of addressing questions about the distribution and spread of native tussock grasslands prior to human arrival in New Zealand c. 800 yr BP. Pollen and phytolith (plant opaline silicate) proxies have been extracted from peat cores at Swampy Summit and Clarks Junction to provide a record of vegetation spanning the Holocene. Using multiple proxies and two sample sites has allowed for comparisons of the record of vegetation from within sites and between sites. A record of the mo

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6

Cook, Charlotte Govett. "Late Pleistocene-Early Holocene glacial dynamics, Asian palaeomonsoon variability and landscape change at Lake Shudu, Yunnan Province, southwestern China." Thesis, University of Exeter, 2009. http://hdl.handle.net/10036/94241.

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A lack of well-distributed, high-resolution records of Late Quaternary Asian palaeomonsoon variability remains an outstanding issue for palaeoclimatologists, and is especially marked in remote regions such as the mountains of southwestern China (Wang et al., 2005). Characterising the nature, timing and magnitude of climate variability in southwestern China is essential for understanding the regional climate as a whole, and the potential social, economic and environmental impacts that may result from Asian monsoon system changes. The NERC-funded research presented in this thesis focuses on a hi

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7

Yurco, Lyanne Nadine. "A Multi-Proxy Investigation of the Late Glacial "Mystery Interval" (17.5-14.5 ka)in the Cariaco Basin, Venezuela." Scholarly Repository, 2010. http://scholarlyrepository.miami.edu/oa_theses/26.

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The "Mystery Interval" (17.5-14.5 ka) is an unusual time period of abrupt global climate change during the late glacial between Heinrich event 1 and the Bølling-Allerød warm period (~17.5-14.5 ka). This period was characterized by extreme cooling in the North Atlantic region, warming in Antarctica, the rise of atmospheric greenhouse gases, and a variety of hydrologic changes around the globe, all of which may have stemmed from Heinrich event 1 and the possible collapse of the Atlantic?s meridional overturning circulation. A distinctive and unique gray clay layer was deposited in Cariaco Basi

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8

Ratnayake, Mudiyanselage Kalpani Manurangi. "A MULTI-PROXY APPROACH TO RECONSTRUCTION OF HOLOCENE CLIMATE CHANGE: EVIDENCE FROM LAKE ERIE SEDIMENTARY ARCHIVES." Kent State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=kent1606763358671089.

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9

Costa, Camila Rodrigues. "Reconstitui??o paleoambiental utilizando uma abordagem multi-proxy em um registro de turfeira tropical de montanha, Minas Gerais, Brasil." UFVJM, 2018. http://acervo.ufvjm.edu.br/jspui/handle/1/1786.

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Data de aprova??o retirada da vers?o impressa do trabalho.<br>?rea de concentra??o: Produ??o Vegetal.<br>Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2018-08-14T22:18:43Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) camila_rodrigues_costa.pdf: 5661319 bytes, checksum: b9deab885dfc53d90534a8a979f8d00d (MD5)<br>Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-10-05T19:35:26Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) camila_rodr

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10

Kilpatrick, Douglas. "The effects of population growth on Ecosystem services in lake Ekoln : A multi-proxy data analysis of a lake core and historical records." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-128822.

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Throughout human history man has utilized the environment to varying degrees, depending on technology and population. These ¨ecosystem services¨ have suffered sustained degradation over the centuries, resulting in large investments having to be made to prevent and reverse further changes to the environment. Few studies have attempted to quantitatively compare how these changes, occurring long before modern environmental monitoring programs started, affected important ecosystem services such as species diversity, water quality, carbon burial and soil stability. The aims of this study were to i)

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11

Terra, Ingrid Horak. "Late Pleistocene-Holocene environmental change in Serra do Espinhaço Meridional (Minas Gerais State, Brazil) reconstructed using a multi-proxy characterization of peat cores from mountain tropical mires." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-14042014-163954/.

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The peatlands are ecosystems extremely sensitive to changes in hydrology, and are considered as faithful \"natural archives of ecological memory\". In the Serra do Espinhaço Meridional, Minas Gerais State, Brazil, mountain peatlands has been studied by soil scientists, but until now multi-proxy studies are almost absent. The location of these peatlands is ideal because they are in an area influenced by the activity of the South America Monsoon Systems (SAMS), which controls the amount and distribution of annual rainfall. The aim of this work was to reconstruct the environmental changes occurre

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12

Alizadeh, Kamaleddin [Verfasser], Hermann [Akademischer Betreuer] Behling, Markus [Gutachter] Hauck, and Erwin [Gutachter] Bergmeier. "Investigating Environmental (Climate and Vegetation) Change of Eastern Amazonia During Pleistocene and Holocene Using Multi-Proxy Analysis / Kamaleddin Alizadeh ; Gutachter: Markus Hauck, Erwin Bergmeier ; Betreuer: Hermann Behling." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2018. http://d-nb.info/1150509481/34.

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13

Skonieczny, Charlotte. "Caractérisation multi-proxy de « poussières Sahariennes » déposées à l'actuel sur la marge Ouest africaine : relations avec les régions sources et les systèmes de transport et implications pour l’interprétation des archives sédimentaires en Atlantique Tropical Nord-Est." Thesis, Lille 1, 2011. http://www.theses.fr/2011LIL10171/document.

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L’étude des dépôts du matériel terrigène éolien dans les archives sédimentaires de l’Atlantique Tropical Nord-Est (ATNE) contribue à documenter les changements paléoclimatiques dans cette région. Toutefois, l’interprétation de ces enregistrements est rendue difficile puisque les outils employés dans les sédiments marins pour retracer les régions sources et les systèmes de transport atmosphérique associés sont encore mal contraints. Une étude des dépôts éoliens dans le contexte climatique actuel a été réalisée sur la marge Ouest africaine dans l’objectif d’améliorer notre compréhension des trac

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14

SORCE, ANGELO C. "Biomanipulation in two Ontario Precambrian Shield lakes: a multi-proxy paleolimnological analysis." Thesis, 2012. http://hdl.handle.net/1974/7606.

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Food web biomanipulations provide the means to partly control water quality problems (i.e. algal blooms) in lakes by altering internal ecological mechanisms. However biomanipulation mechanisms are complex and the results are often confounded through the interactions of various stressors. This study used paleolimnological approaches using the fossil remains of diatoms, Cladocera and Chaoborus indicators to explore the effects of past fish manipulations of two oligotrophic lakes (Mouse and Ranger lakes) located in south-central Ontario. A major focus was the temporal period associated with the m

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15

Alizadeh, Kamaleddin. "Investigating Environmental (Climate and Vegetation) Change of Eastern Amazonia During Pleistocene and Holocene Using Multi-Proxy Analysis." Doctoral thesis, 2017. http://hdl.handle.net/11858/00-1735-0000-002E-E318-8.

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