Divining the Distant Past

Hammer, Olav

doi:10.4324/9780429061196-6

Cited by 3 publications

(5 citation statements)

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“…See Table 1, Tables S1-S3 in Supporting Information S1 for data sources and Data Sets S1 and S2 for data. (b) Principal component (PC) analysis map of heavy minerals of the upper Quaternary loess and riverbed samples on the eastern and western Chinese Loess Plateau by using PAST software (Hammer, 2019). See Table S5 in Supporting Information S1 for data.…”

Section: Origin Of the Upper Quaternary Loess On The Eastern Clp Base...mentioning

confidence: 99%

Proximal Supply in Loess Deposition of the Chinese Loess Plateau

et al. 2023

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Previous studies suggest that the northeastern Tibetan Plateau has been the major source area for the Chinese Loess Plateau (CLP); this contribution was used to prove that the Yellow River played a dominant role in transporting the materials from the northeastern Tibetan Plateau, making them available for the CLP. Accordingly, the proximal North China Craton is considered to have increased supply potential of dust to the CLP further eastward. However, the origin of the eastern CLP and the relationship between loess and proximal river sediments have never been systematically studied, which prevents us from working out the surface process between source and sink. In this study, we conducted U–Pb dating and analyses of the grain morphologies of detrital zircons and heavy mineral assemblages on the upper Quaternary loess and riverbed sediments on the eastern and central CLP. We also built a data set (n = 48,161) of the zircon U–Pb ages of the Quaternary loess, deserts, and potential source areas. Our results show that most loess samples on the eastern CLP were strongly affected by the North China Craton. The dust supply ability of rivers to loess is very limited. Along the dust transport path, the proximal mountains, rivers and loess can all provide dust for loess deposition. Our findings emphasize the important role proximal supply has played in the evolution of the CLP since at least the late Neogene, for example, the northeastern Tibetan Plateau for the western and central CLP, and the North China Craton for the eastern CLP.

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Section: Origin Of the Upper Quaternary Loess On The Eastern Clp Base...mentioning

confidence: 99%

Proximal Supply in Loess Deposition of the Chinese Loess Plateau

et al. 2023

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“…According to Giovino et al (2015), Domina et al (2017), and Domina (2018), each morphological character was subjected to a preliminary univariate variance analysis (data not shown) according to the specific data structure, setting each morphological character as independent variable (X) and the taxon as dependent variable (Y), using PAST version 3.26b (Hammer et al, 2001;Hammer, 2019). Pearson correlation coefficients (r) among the 11 measured characters were calculated, as presented in the Supplementary Information 3.…”

Section: Statistical Treatment Of Datamentioning

confidence: 99%

An integrated approach to the study of Hypericum occurring in Sicily

Giovino¹,

Carrubba²,

Lazzara³

et al. 2020

Turk J Bot

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“…The REDFIT is a function that obtains the spectral density of the data, averaging the spectra when splitting the time series into several segments and overlapping by 50%, reducing noise but also spectral resolution. This analysis yields the frequency by time spectra, which can be turned into periodicities when dividing the average time resolution of the record by the correspondent frequency (Hammer, 2019;Schulz & Mudelsee, 2018). The significance tests (from 95% to 99%) are made based on the chi2 method (Ghil et al, 2002) and when the power of determined frequency goes beyond these significance lines, that data is considered as a relevant periodicity for the record.…”

Section: Statistical Analysesmentioning

confidence: 99%

“…The plot "cone of influence" is relevant to show where boundary effects are present (Hammer, 2019). Both REDFIT and Wavelet transform analysis were made using the software PAST.…”

Section: Statistical Analysesmentioning

confidence: 99%

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Climate and environmental changes in southwestern Amazon Basin over the last 3000 years based on speleothem isotope records, Brazil

Libera¹

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Agradeço primeiramente aos meus pais, Rita e Manoel, ao meu irmão, Danilo, e à minha irmã que ganhei da vida, Maria Alice, por todo amor, suporte, incentivo, torcida, compreensão e apoio que me deram durante a vida, em todos os momentos, incondicionalmente.Agradeço ao meu compnaheiro, Julio Cauhy, por toda parceria, companhia, apoio, paciência e dedicação, tanto durante este trabalho quanto na vida. Obrigada por todas as risadas, sonhos, viagens, aventuras, chocolates e cafés compartilhados sempre.Agradeço ao meu orientador Prof. Dr. Francisco William da Cruz por todo ensinamento, orientação, discussões e por todas as oportunidades e possibilidades que me apresentou na paleoclimatologia.Agradeço ao Dr. Valdir F. Novello por toda ajuda, todas as reuniões, conversas, parceria, dedicação, orientação, conselhos, suporte e conhecimento para a realização deste trabalho.Agradeço às (aos) minhas (meus) companheiras(os) e colegas de laboratório Melissa, Verônica, Angela, Plácido, Vanessa, Nathália, pelo companheirismo, apoio e suporte. Em especial, agradeço à Giselle Utida, além de tudo, pela amizade, pelos risos, por todo suporte e parceria, e ao Pânico (Nicolás Strikis), pelas viagens, conversas, discussões e conhecimento transmitido. Agradeço o apoio dos envolvidos no Laboratório de Isótopos Estáveis (LES-CPGEO) doIGc/USP, ao Lawrence Edwards pela oportunidade de trabalhar nos laboratórios da Universidade de Minnesota (EUA) onde foram feitas as análises geocronológicas, ao Dr. José Leandro Campos pela ajuda com a parte estatística do trabalho, à Rebecca Orrison pela realização dos modelos climáticos e pela amizade que surgiu dessa parceria, ao Prof. Dr. Mathias Vuille pela colaboração imprescindível nesse trabalho, pela revisão do artigo e pelas discussões, e ao Evandro Girotto que realiza as coletas de água de chuva ao lado da caverna.Também agradeço à Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) e pelo projeto PIRE-CREATE pelo financiamento do projeto de pesquisa, tornando possível e viável a realização deste trabalho.Sou extremamente grata a todas as pessoas que, direta ou indiretamente, fizeram parte da minha formação e deste trabalho. v AKNOWLEDGMENTS First, I thank my parents, Rita and Manoel, my brother, Danilo, and my sister that I gained from life, Maria Alice, for all the love, support, encouragement, cheering, understanding and support they have given me during my life, at all times, unconditionally.I thank my life partner, Julio Cauhy, for all the partnership, company, support, patience, and dedication, both during this work and in life. Thanks for all the laughs, dreams, trips, adventures, chocolates, and coffees always shared.I thank my supervisor Prof. Dr. Francisco William da Cruz for all the teachings, guidance, discussions, and for all the opportunities and possibilities that he presented to me in paleoclimatology.I thank Dr. Valdir F. Novello for all the help, all the meetings, conversations, partnership, dedication, guidance, advice, support and knowledge to accomplish this work.I t...

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Divining the Distant Past

Cited by 3 publications

References 0 publications

Proximal Supply in Loess Deposition of the Chinese Loess Plateau

Proximal Supply in Loess Deposition of the Chinese Loess Plateau

An integrated approach to the study of Hypericum occurring in Sicily

Climate and environmental changes in southwestern Amazon Basin over the last 3000 years based on speleothem isotope records, Brazil

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