Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 36 for “"Holocene climate"”.
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Varve Chronology, Proxy Calibration, and Holocene Climate of Minnesota
Despite the numerous Holocene paleoclimatic records from the North American continent, few existing records from the American Midwest have adequate chronological controls, marking it problematic to link regional climatic changes to possible larger-scale forcing. With solid 14C chronologies, the …
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Late Holocene Climate-Flood Relationships on the Lower Ohio River
… the Lower Ohio River and their relationship with climate are investigated using a ca. 2000-year-long sediment core collected from Goose Pond, Indiana. Using high-resolution radiocarbon dating (n = 25), late Holocene sedimentation rates were calculated for Goose Pond. Changes in sediment …
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Biogeographical detection of Holocene climate refugia in Italian Ecoregions: an applied proposal
L'abstract è presente nell'allegato / the abstract is in the attachment
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Holocene climate and environmental variability in NE Germany inferred from annually laminated lake sediments
Understanding the role of natural climate variability under the pressure of human induced changes of climate and landscapes, is crucial to improve future projections and adaption strategies. This doctoral thesis aims to reconstruct Holocene climate and environmental changes in NE Germany based on …
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Living with a changing climate: Holocene climate variability and socio-evolutionary trajectories, central Turkey
… variation in the natural world (particularly climate). In the Eastern Mediterranean region, connecting the human past with palaeoclimate is an important research theme but the complex interactions between them are still poorly understood and past climate records have often been collected from …
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Holocene climate and environmental dynamics on the Tristan da Cunha island group, South Atlantic
… present a detail high resolution record of past climate changes from the central South Atlantic. Peat and lacustrine sediment sequences were retrieved from the Tristan da Cunha island group in the central South Atlantic. These sequences were analysed with a multiproxy approach including pollen …
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Microbial communities and their response to Pleistocene and Holocene climate variabilities in the Russian Arctic
… is considered as a focal region in the ongoing climate change debate. The currently observed and predicted climate warming is particularly pronounced in the high northern latitudes. Rising temperatures in the Arctic cause progressive deepening and duration of permafrost thawing during the arctic …
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GEOARCHAEOLOGICAL AND PALAEOENVIRONMENTAL RECONSTRUCTION OF THE HOLOCENE CLIMATE-ENVIRONMENTAL-HUMAN NEXUS IN THEKURDISTAN REGION OF IRAQ
… provides several new perspectives for the Holocene paleoclimatic and paleoenvironment reconstruction in the KRI Moreover, it enhances our understanding of the human responses and adaptation to climate, landscape, ecosystem, and natural resources availability changes across the last …
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Tree-limit ecotonal response to Holocene climate change in the Scandes Mountains of west-central Sweden
The aim of this thesis was to reconstruct the Holocene vegetational and climatic development in the Sylarna-Storulvån area, western Jämtland, in the central Scandes Mountains. Temporal trends and fluctuations in the elevation and vegetational character of the tree-limit ecotone were studied mainly …
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Algal and protozoan response to Holocene climate change and anthropogenic impact: a case study from Sluice Pond, MA
… a diverse dinocyst record since the early Holocene. High dinocyst concentrations, including morphotypes not previously described, as well as the preservation of several specimens of cellulosic thecae are attributed to low dissolved oxygen (DO) in the basin. The fossil protozoan record …
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Palaeoenvironmental reconstruction of late Holocene climate dynamics in Southwest Africa using a multi-proxy characterization of Namaqualand mudbelt sediments
… the recognized importance of understanding late Holocene climatic changes in southern Africa, a dearth of available evidence has resulted in a frag- mented view of the recent past. South Africa has been identified as a key focus region for palaeoclimatic studies, as it reflects the dynamics of …
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Late glacial to Holocene climate and vegetation changes on the Tibetan Plateau inferred from fossil pollen records in lacustrine sediments
The past climate in central Asia, and especially on the Tibetan Plateau (TP), is of great importance for an understanding of global climate processes and for predicting the future climate. As a major influence on the climate in this region, the Asian Summer Monsoon (ASM) and its evolutionary …
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Holocene climate change and peatland dynamics in southern Sweden based on tree-ring analysis of subfossil wood from peat deposits
… strong, which indicates that large-scale climate dynamics had a significant impact on bog-tree growth variability during the Holocene Thermal Maximum (HTM), a relatively warm and dry period generating favourable growth conditions on peatlands over large parts of North-west Europe. Nine …
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Testing the late-Holocene climate signal from ombrotrophic bogs in southernmost Chile and the Falkland Islands: a multi-proxy, multi-profile and multi-site approach
… (SWW), offer the potential of reliable palaeoclimate archives. This investigation aimed to test the late-Holocene climate signal related to variability of the SWW. Three sites were investigated: San Juan and Karukinka bog, southernmost Chile and San Carlos, a Sphagnum dominated bog, discovered …
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Neoglacial climate in the Southern Coast Mountains, British Columbia
Palaeobotanical records of Holocene climate change in the southern Coast Mountains identify a cooler/wetter Neoglacial period subsequent to 6600 BP. Geomorphic evidence of alpine glacier advance suggests that there were three distinct cooler/wetter periods during the Neoglacial, but this pattern …
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Biogeomorphology and soil geomorphology of small semiarid basins, northeastern Arizona : influences of topoclimate and climate variations
… with weakly cemented sandstones are sensitive to Holocene climate changes on millennial to decadal scales. It is hypothesized that these climate changes affect processes of weathering, erosion and plant community establishment on hillslopes in this semiarid environment. In small basins formed at …
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Chironomid-based paleotemperature reconstruction of the North Slave Region, Northwest Territories during the Late Holocene
I reconstructed late Holocene mean July air temperatures using a chironomid-based inference model based on lake sediment collected from two shallow lakes within the North Slave Region, Northwest Territories. No significant shifts were identified in the chironomid species assemblages, which …
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Alkenone-based evidence of Holocene slopewater cooling in the northwest Atlantic
… are presented and used to assess scenarios for Holocene climate variability. Alkenone concentration and unsaturation records are presented from cores KNR140-39GGC, KNR140-51GGC, MD95-2028, MD95-2031, and MD95-2025 from the Blake Ridge (320N), Carolina Slope (330N), Fogo Seamount (42°N), Narwhal …
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The Ups and Downs of the Holocene: Exploring Relationships between Global CO2 and Climate Variability in the North Atlantic Region
… thesis aimed to examine the relationship between climate and atmospheric CO2 concentrations through rapid climate changes during the Holocene. Climate was reconstructed using high-resolution, radiocarbon dated, lake sediment geochemical proxies (magnetic susceptibility, loss-on-ignition, total …
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