• Non ci sono risultati.

Prominent features in isotopic, chemical and dust stratigraphies from GV7, a drilling site in East Antarctica

N/A
N/A
Info
Scarica
Protected

Academic year: 2021

Condividi "Prominent features in isotopic, chemical and dust stratigraphies from GV7, a drilling site in East Antarctica"

Copied!
1
0
0

Caricamento.... (Visualizza il testo completo ora)

Scarica adesso ( 1 pagine )

Testo completo

(1)

Geophysical Research Abstracts Vol. 18, EGU2016-15267, 2016 EGU General Assembly 2016

© Author(s) 2016. CC Attribution 3.0 License.

Prominent features in isotopic, chemical and dust stratigraphies from GV7, a drilling site in East Antarctica

Laura Caiazzo (1) and the GV7 Team

(1) Dept. of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3, 50019 Sesto F.no (Florence), Italy (laura.caiazzo@unifi.it, silvia.becagli@unifi.it, fabio.giardi@unifi.it, mirko.severi@unifi.it, rita.traversi@unifi.it, roberto.udisti@unifi.it), (2) DISAT-University Milano-Bicocca, Piazza della Scienza, 1, 20126 Milano, Italy (giovanni.baccolo@mib.infn.it, barbara.delmonte@unimib.it), (3) Institute for the Dynamics of Environmental

Processes-CNR, via Torino, 155, 30172 Venice-Mestre, Italy (barbante@unive.it, gabrieli@unive.it), (4) DAIS, Ca’ Foscari University of Venice, via Torino, 155, Venice-Mestre, Italy (barbante@unive.it, iodio9@yahoo.it, andrea.spolaor@unive.it, barbara.stenni@unive.it), (5) ENEA, Casaccia Research Centre, PO BOX 2400, I-00100 Rome, Italy

(massimo.frezzotti@enea.it, biancamaria.narcisi@enea.it), (6) Korea Polar Research Institute (KOPRI), Songdomirearo 26, Yeonsu-gu, Incheon 406-840, Republic of Korea (yhan@kopri.re.kr, hong909@kopri.re.kr, sdhur@kopri.re.kr,

heejin@kopri.re.kr, jhkang@kopri.re.kr), (7) Dept. of Physics and Earth Sciences, University of Parma, Parco Area delle Scienze, 157/A, Parma, Italy (enricomaria.selmo@unipr.it)

In the framework of the new project “The IPICS 2k Array: a network of ice core climate and climate forcing records for the last two millennia”, which represents a thematic research line of International Partnerships in Ice Core Sciences (IPICS), a 250 m deep ice core was retrieved (spanning roughly the last millennium) at GV7 site, together with several shallow firn cores and snow pits. The PNRA (Programma Nazionale di Ricerche in Antartide) project “IPICS-2kyr-It” represents the Italian contribution to IPICS “The 2k Array” and it is being accomplished in collaboration with KOPRI (Korean Polar Reasearch Institute).

The availability of various records from the same site all spanning a temporal period ranging from the last decades to the last centuries will allow achieving a stacked record of chemical and isotopic markers and accumulation rate that is basic for a reliable climatic reconstruction.

Previous surveys in the area of GV7 (70

◦

41’ S - 158

◦

51’ E, 1950 m a.s.l., East Antarctica) showed that this site is characterized by a relatively high snow accumulation (about 240 mm water eq./year), allowing a high resolution study of the climatic variability in the last millennium.

Here we present the isotopic, chemical and dust stratigraphies of the snow pits sampled at GV7 during the 2013/14 field season and analysed in Italy and in Korea.

Reversibly deposited components such as nitrate and methansulphonic acid (MSA) appear to be well preserved and show a clear seasonal profiles, as one can observe from the records achieved both by Italian and Korean labs.

Such a feature, together with the high accumulation rate, allowed obtaining an accurate dating of the snow pits,

based on the counting of annual layers. At this purpose, a multi-parametric approach was chosen by using MSA,

non-sea-salt sulphate, and d18O as seasonal markers. The dating confirmed the value of the accumulation rate

found during previous samplings.

Riferimenti

Scarica adesso ( PDF - 1 pagine - 40.93 KB )

Documenti correlati

In the framework of the International Partnerships in Ice Core Sciences (IPCS) initiatives the GV7 site (70

Water stable isotopes and snow accumulation (SMB) values from a shallow firn core, obtained at GV7 during the 2001-2002 International Trans-Antarctic Scientific Expedition

Volcanic Fluxes Over the Last Millennium as Recorded in the Gv7 Ice Core (Northern Victoria Land, Antarctica)

These volcanic fluxes were then compared with those from other three ice cores drilled in the same region (TALDICE, TD96, GV7-ITASE) calculated using the same method. Moreover,

Fire in ice: two millennia of boreal forest fire history from the Greenland NEEM ice core

Here we use the specific biomarker levo- glucosan together with black carbon and ammonium concen- trations from the North Greenland Eemian (NEEM) ice cores (77.49 ◦ N, 51.2 ◦ W; 2480

Application of self-mixing interferometry for depth monitoring in the ablation of TiN coatings

In literature several monitoring strategies for ablation depth measurement have been proposed, using the acoustic emission of the process [6] and mechanical vibration

Uno sguardo oltre Roma: Padre Umberto Maria Fasola e i cimiteri cristiani della Sicilia tra ricerca e tutela

Di questo era profondamente consapevole Padre Umberto Maria Fasola quando iniziò a rivolgere lo sguardo alla Sicilia, assumendo l’incarico di segretario della Pontificia

XANES Iron Geochemistry in the Mineral Dust of the Talos Dome Ice Core (Antarctica) and the Southern Hemisphere Potential Source Areas

In the last glacial period the Fe oxidation of TALDICE dust is compatible with a South American provenance from Patagonia and Tierra del Fuego (the average iron K-edge energy for

Epinephrine for out of hospital cardiac arrest: A systematic review and meta-analysis of randomized controlled trials

In the subgroup analyses we found that (1) the survival to hospital discharge, ROSC, and survival to hospital admission increased when epinephrine was compared with a placebo/no