DSpace Collection:
http://hdl.handle.net/2122/52
2024-03-04T16:44:29ZLa rete magnetica italiana e la carta magnetica d'Italia al 2020.0
http://hdl.handle.net/2122/16658
Title: La rete magnetica italiana e la carta magnetica d'Italia al 2020.0
Authors: Dominici, Guido; Di Mauro, Domenico; Meloni, Antonio; Carroccio, Marianna; Cauli, Federica; Sperti, Maurizio2023-01-01T00:00:00ZExpedition 390 Preliminary Report: South Atlantic Transect 1
http://hdl.handle.net/2122/16132
Title: Expedition 390 Preliminary Report: South Atlantic Transect 1
Authors: Coggon, Rosalind; Sylvan, Jason B; Teagle, Damon A.H.; Reece, Julia; Chrsteson, Gail L; Estes, Emily R.; Williams, Trevor J.; Expedition 390 Scientists, .; Dinarès Turell, Jaume
Editors: International Ocean Discovery Program.
Abstract: The South Atlantic Transect (SAT) is a multidisciplinary scientific ocean drilling project that comprises four International Ocean Discovery Program (IODP) expeditions: engineering Expeditions 390C and 395E as well as Expeditions 390 and 393. Altogether, the expeditions aim to recover complete sedimentary sections and the upper 100–350 m of the underlying oceanic crust along a slow/intermediate spreading rate Mid-Atlantic Ridge crustal flow line at ~31°S. The sediments along this transect were originally spot cored more than 50 y ago during Deep Sea Drilling Project Leg 3 (December 1968–January 1969) to help verify the theories of seafloor spreading and plate tectonics. Given dramatic advances in drilling technology and analytical capabilities since Leg 3, many high-priority scientific objectives can be addressed by revisiting the transect. The SAT expeditions target six primary sites on 7, 15, 31, 49, and 61 Ma ocean crust, which fill critical gaps in our sampling of intact in situ ocean crust with regards to crustal age, spreading rate, and sediment thickness. Drilling these sites is required to investigate the history of the low-temperature hydrothermal interactions between the aging ocean crust and the evolving South Atlantic Ocean and quantify past hydrothermal contributions to global biogeochemical cycles. Samples from the transect of the previously unexplored sediment- and basalt-hosted deep biosphere beneath the South Atlantic Gyre are essential to refining global biomass estimates and examining microbial ecosystems’ responses to variable conditions in a low-energy gyre and aging ocean crust. The transect is located near World Ocean Circulation Experiment Line A10, providing access to records of carbonate chemistry and deepwater mass properties across the western South Atlantic through key Cenozoic intervals of elevated atmospheric CO2 and rapid climate change. Reconstruction of the history of the deep western boundary current and deepwater formation in the Atlantic basins will yield crucial data to test hypotheses regarding the role of evolving thermohaline circulation patterns in climate change and the effects of tectonic gateways and climate on ocean acidification. Engineering Expeditions 390C and 395E cored a single hole through the sediment/basement interface with the advanced piston corer/extended core barrel system at five of the six primary proposed SAT sites and installed a reentry system with casing either into basement or within 10 m of basement at each of those five sites. Expedition 390 (7 April–7 June 2022) conducted operations at three of the SAT sites, recovering 700 m of core (77% recovery) over 30.3 days of on-site operations. Sediment coring, basement drilling, and logging were conducted at two sites on 61 Ma crust, and sediment coring was completed at the 7 Ma crust site. At Site U1557 on 61 Ma crust, the drill bit was deposited on the seafloor prior to downhole logging, leaving Hole U1557D available for future deepening and to establish a legacy borehole for basement hydrothermal and microbiological experiments. Expedition 390 scientists additionally described, and analyzed data from, 792 m of core collected during Expeditions 390C and 395E. Expedition 393 plans to operate at four sites, conducting basement drilling and downhole logging at the 7 Ma site, in addition to sediment coring, basement drilling, and logging at the sites intermediate in age.2022-01-01T00:00:00ZFilastrocca della Terra
http://hdl.handle.net/2122/15731
Title: Filastrocca della Terra
Authors: Ciaccio, Maria Grazia; Di Laura, Francesca2021-01-01T00:00:00ZAumento del livello del mare. Cosa è importante sapere per affrontare i prossimi cambiamenti.
http://hdl.handle.net/2122/15663
Title: Aumento del livello del mare. Cosa è importante sapere per affrontare i prossimi cambiamenti.
Authors: De Lucia, Maddalena; Anzidei, Marco; Musacchio, Gemma; Solarino, Stefano; Eva, Elena
Abstract: L’aumento del livello del mare è ancora uno degli effetti meno conosciuti del riscaldamento globale.
Le conseguenze di questo fenomeno interessano oltre 400 milioni di persone in tutto il mondo e le stime dicono che questo numero potrebbe aumentare considerevolmente nei prossimi anni.
Si tratta di un fenomeno che ha la capacità di modificare la geografia delle coste
di tutto il pianeta, come già avvenuto più volte nel passato. Tuttavia oggi sta accadendo qualcosa di diverso: i dati di centinaia di studi sintetizzati nei Rapporti dell’IPCC (Intergovernmental Panel on Climate Change), mostrano in maniera inequivocabile che l’attuale riscaldamento globale, principalmente causato dalle attività umane a partire dal 1880 con l’inizio dell’era industriale, ha innescato un aumento del livello del mare molto rapido.
Nell’arco di tempo di una sola generazione potrà avere un impatto socio-economico senza precedenti sulle popolazioni costiere. Sebbene i dati scientifici ottenuti da molteplici studi che abbracciano varie discipline che
spaziano dal clima, alle scienze della Terra e alla biologia siano concordi nel mostrare la scala globale del fenomeno, tuttavia i rischi connessi non sono ancora ben compresi, né ancora tali da suscitare un’adeguata
consapevolezza per intraprendere opportune politiche di mitigazione e adattamento.2022-06-01T00:00:00Z