Holocene vegetational changes in Northeastern Greenland and its link to North Atlantic Oscillation/Arctic Oscillation
[eng] Rapid climate change and its pronounced effect over the Arctic has become a hot topic for both the scientific community and the public, raising concerns about the future of its ecosystems. In this context, Greenland, with its minimal human influence serves as a natural archive of past climate....
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| Tipo de recurso: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/217809 |
| Acceso en línea: | https://hdl.handle.net/2445/217809 http://hdl.handle.net/10803/693408 |
| Access Level: | acceso abierto |
| Palabra clave: | Palinologia Paleoclimatologia Holocè Grenlàndia Canvi climàtic Palynology Paleoclimatology Holocene Greenland Climatic change |
| Sumario: | [eng] Rapid climate change and its pronounced effect over the Arctic has become a hot topic for both the scientific community and the public, raising concerns about the future of its ecosystems. In this context, Greenland, with its minimal human influence serves as a natural archive of past climate. This island's climate is strongly influenced by large- scale atmospheric and oceanic interactions, particularly the North Atlantic Oscillation/Arctic Oscillation (NAO/AO) and the Atlantic Meridional Overturning Current (AMOC). These patterns influence temperature and precipitation, with NAO+ phases bringing colder and drier conditions and NAO- phases bringing warmer and moister conditions. AMOC, a key component of global heat distribution, also plays a role by influencing sea-ice cover along Greenland's eastern coast. This study was conducted on the Zackenberg valley and its surroundings, in NE Greenland (74°N, 20°W). The main aim of this study is to quantitatively reconstruct the climate evolution of NE Greenland based on modern pollen-climate relationships. Our specific goals are to: (1) establish a reference collection of modern pollen from the Zackenberg area, (2) identify the key environmental and ecological factors influencing pollen assemblages in the sediment record, (3) reconstruct past vegetation changes throughout the Holocene epoch in Zackenberg, and (4) establish linkages between these reconstructed vegetation changes and past climate variations, including those associated with the NAO/AO. To achieve these objectives, a quantitative approach based on modern pollen-climate relationships was executed. |
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