Composizione dei sedimenti moderni Kongsfjorden, Isole Svalbard
This thesis was developed to provide a preliminary analysis of the sedimentary sequence (NYA11_09) in order to discriminate the major ecosystem changes that have occurred in Kongsfjorden over the last ca. 250 years. The main objectives of this thesis were: - to assess the elemental composition of a...
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Alma Mater Studiorum - Università di Bologna
2021
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ftunivbollaurea:oai:amslaurea.cib.unibo.it:23273 2023-05-15T17:05:14+02:00 Composizione dei sedimenti moderni Kongsfjorden, Isole Svalbard Bigliardi, Luca Guerra, Roberta Giglio, Federico Miserocchi, Stefano 2021-05-28 http://amslaurea.unibo.it/23273/ unknown Alma Mater Studiorum - Università di Bologna Bigliardi, Luca (2021) Composizione dei sedimenti moderni Kongsfjorden, Isole Svalbard. [Laurea magistrale], Università di Bologna, Corso di Studio in Analisi e gestione dell'ambiente [LM-DM270] - Ravenna <http://amslaurea.unibo.it/view/cds/CDS8418/>, Documento full-text non disponibile Kongsfjorden flusso di sedimento composizione elementale apporto detritico e biogeno Analisi e gestione dell'ambiente [LM-DM270] - Ravenna PeerReviewed info:eu-repo/semantics/masterThesis 2021 ftunivbollaurea 2022-05-01T15:23:40Z This thesis was developed to provide a preliminary analysis of the sedimentary sequence (NYA11_09) in order to discriminate the major ecosystem changes that have occurred in Kongsfjorden over the last ca. 250 years. The main objectives of this thesis were: - to assess the elemental composition of a sediment core collected from the inner part of a fjord in the Svalbard Islands; - to identify the main factors that have regulated the input of detrital and biogenic material to the sampling area. In order to achieve these objectives, the analysis of the main components was carried out using an XRF core scanned Avaatech III° generation, to evaluate the compositional variability of the elements along the entire core. The profiles of selected elemental ratios were discussed. The sedimentary sequence was divided into three sectors (R1-2-3); through the Ti/Ca, Fe/Ca and K/Ca ratios, the detrital input trend was determined, and by using the Ba/Al, Ca/Al and Br/Cl ratios, the biogenic input trend was assessed. The results have shown a greater compositional variability in sector R2, presumably associated with a phase characterized by significant hydrological and climatic changes that consequently affected the composition, flows towards the bottom sediment, and debris inputs. This interval corresponds to an age between 1830 and 1940. Sector R1, from ca. 1940 to the most recent era (modern age) has shown less variability and the changes recorded in both marine circulation and erosion, transport and deposition of sediments of both detrital and biogenic origin are mainly due to climate change since 1950. Sector R3, from ca. the late 1700 to the 1840, seems to record the Little Ice Age. Master Thesis Kongsfjord* Kongsfjorden Svalbard Università di Bologna: AMS Tesi di Laurea (Alm@DL) Svalbard |
institution |
Open Polar |
collection |
Università di Bologna: AMS Tesi di Laurea (Alm@DL) |
op_collection_id |
ftunivbollaurea |
language |
unknown |
topic |
Kongsfjorden flusso di sedimento composizione elementale apporto detritico e biogeno Analisi e gestione dell'ambiente [LM-DM270] - Ravenna |
spellingShingle |
Kongsfjorden flusso di sedimento composizione elementale apporto detritico e biogeno Analisi e gestione dell'ambiente [LM-DM270] - Ravenna Bigliardi, Luca Composizione dei sedimenti moderni Kongsfjorden, Isole Svalbard |
topic_facet |
Kongsfjorden flusso di sedimento composizione elementale apporto detritico e biogeno Analisi e gestione dell'ambiente [LM-DM270] - Ravenna |
description |
This thesis was developed to provide a preliminary analysis of the sedimentary sequence (NYA11_09) in order to discriminate the major ecosystem changes that have occurred in Kongsfjorden over the last ca. 250 years. The main objectives of this thesis were: - to assess the elemental composition of a sediment core collected from the inner part of a fjord in the Svalbard Islands; - to identify the main factors that have regulated the input of detrital and biogenic material to the sampling area. In order to achieve these objectives, the analysis of the main components was carried out using an XRF core scanned Avaatech III° generation, to evaluate the compositional variability of the elements along the entire core. The profiles of selected elemental ratios were discussed. The sedimentary sequence was divided into three sectors (R1-2-3); through the Ti/Ca, Fe/Ca and K/Ca ratios, the detrital input trend was determined, and by using the Ba/Al, Ca/Al and Br/Cl ratios, the biogenic input trend was assessed. The results have shown a greater compositional variability in sector R2, presumably associated with a phase characterized by significant hydrological and climatic changes that consequently affected the composition, flows towards the bottom sediment, and debris inputs. This interval corresponds to an age between 1830 and 1940. Sector R1, from ca. 1940 to the most recent era (modern age) has shown less variability and the changes recorded in both marine circulation and erosion, transport and deposition of sediments of both detrital and biogenic origin are mainly due to climate change since 1950. Sector R3, from ca. the late 1700 to the 1840, seems to record the Little Ice Age. |
author2 |
Guerra, Roberta Giglio, Federico Miserocchi, Stefano |
format |
Master Thesis |
author |
Bigliardi, Luca |
author_facet |
Bigliardi, Luca |
author_sort |
Bigliardi, Luca |
title |
Composizione dei sedimenti moderni Kongsfjorden, Isole Svalbard |
title_short |
Composizione dei sedimenti moderni Kongsfjorden, Isole Svalbard |
title_full |
Composizione dei sedimenti moderni Kongsfjorden, Isole Svalbard |
title_fullStr |
Composizione dei sedimenti moderni Kongsfjorden, Isole Svalbard |
title_full_unstemmed |
Composizione dei sedimenti moderni Kongsfjorden, Isole Svalbard |
title_sort |
composizione dei sedimenti moderni kongsfjorden, isole svalbard |
publisher |
Alma Mater Studiorum - Università di Bologna |
publishDate |
2021 |
url |
http://amslaurea.unibo.it/23273/ |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
Kongsfjord* Kongsfjorden Svalbard |
genre_facet |
Kongsfjord* Kongsfjorden Svalbard |
op_relation |
Bigliardi, Luca (2021) Composizione dei sedimenti moderni Kongsfjorden, Isole Svalbard. [Laurea magistrale], Università di Bologna, Corso di Studio in Analisi e gestione dell'ambiente [LM-DM270] - Ravenna <http://amslaurea.unibo.it/view/cds/CDS8418/>, Documento full-text non disponibile |
_version_ |
1766059660628983808 |