title: Prominent features in isotopic, chemical and dust stratigraphies from coastal East Antarctic ice sheet (Eastern Wilkes Land).
abstract: In this work we present the isotopic, chemical and dust stratigraphies of two snow pits sampled in 2013/14 at GV7 (coastal East Antarctica: 70°41' S - 158°51' E, 1950 m a.s.l.). A large number of chemical species are measured aiming to study their potentiality as environmental changes markers. Seasonal cluster backward trajectories analysis was performed and compared with chemical marker stratigraphies. Sea spray aerosol is delivered to the sampling site together with snow precipitation especially in autumn-winter by air masses arising from Western Pacific Ocean sector. Dust show maximum concentration in spring when the air masses arising from Ross Sea sector mobilize mineral dust from ice-free areas of the Transantarctic mountains. The clear seasonal pattern of sulfur oxidized compounds allows the dating of the snow-pit and the calculation of the mean accumulation rate, which is 242 ± 71 mm w.e. for the period 2008-2013. Methanesulfonic acid and NO3-do not show any concentration decreasing trend as depth increases, also considering a 12 m firn core record. Therefore these two compounds are not affected by post-depositional processes at this site and can be considered reliable markers for past environmental changes reconstruction. The rBC snow-pit record shows the highest values in summer 2012 likely related to large biomass burning even occurred in Australia in this summer. The undisturbed accumulation rate for this site is demonstrated by the agreement between the chemical stratigraphies and the annual accumulation rate of the two snow-pits analysed in Italian and Korean laboratories.
authors.affiliation: Dept. of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia, 3, 50019 Sesto F.no (Florence), Italy.
authors.forename: L
authors.initials: L
authors.lastname: Caiazzo
authors.affiliation: DISAT-University Milano-Bicocca, Piazza della Scienza, 1, 20126 Milano, Italy; University of Siena, Earth Science Department, Via Laterino, 8, 53100 Siena, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Baccolo
authors.affiliation: Institute for the Dynamics of Environmental Processes-CNR, Via Torino, 155, 30172 Venice-Mestre, Italy; DAIS, Ca' Foscari University of Venice, Via Torino, 155, Venice-Mestre, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Barbante
authors.affiliation: Dept. of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia, 3, 50019 Sesto F.no (Florence), Italy. Electronic address: silvia.becagli@unifi.it.
authors.forename: S
authors.initials: S
authors.lastname: Becagli
authors.affiliation: DAIS, Ca' Foscari University of Venice, Via Torino, 155, Venice-Mestre, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Bertò
authors.affiliation: Laboratory for Earth Observations and Analyses, ENEA - C.R. Casaccia, I-00123 Rome, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Ciardini
authors.affiliation: DISAT-University Milano-Bicocca, Piazza della Scienza, 1, 20126 Milano, Italy.
authors.forename: I
authors.initials: I
authors.lastname: Crotti
authors.affiliation: DISAT-University Milano-Bicocca, Piazza della Scienza, 1, 20126 Milano, Italy.
authors.forename: B
authors.initials: B
authors.lastname: Delmonte
authors.affiliation: DAIS, Ca' Foscari University of Venice, Via Torino, 155, Venice-Mestre, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Dreossi
authors.affiliation: Laboratory for Earth Observations and Analyses, ENEA - C.R. Casaccia, I-00123 Rome, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Frezzotti
authors.affiliation: DAIS, Ca' Foscari University of Venice, Via Torino, 155, Venice-Mestre, Italy.
authors.forename: J
authors.initials: J
authors.lastname: Gabrieli
authors.affiliation: Dept. of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia, 3, 50019 Sesto F.no (Florence), Italy.
authors.forename: F
authors.initials: F
authors.lastname: Giardi
authors.affiliation: Korea Polar Research Institute (KOPRI), 26 Songdomirearo, Yeonsu-gu, Incheon 21990, Republic of Korea.
authors.forename: Y
authors.initials: Y
authors.lastname: Han
authors.affiliation: Korea Polar Research Institute (KOPRI), 26 Songdomirearo, Yeonsu-gu, Incheon 21990, Republic of Korea.
authors.forename: S-B
authors.initials: SB
authors.lastname: Hong
authors.affiliation: Korea Polar Research Institute (KOPRI), 26 Songdomirearo, Yeonsu-gu, Incheon 21990, Republic of Korea.
authors.forename: S D
authors.initials: SD
authors.lastname: Hur
authors.affiliation: Korea Polar Research Institute (KOPRI), 26 Songdomirearo, Yeonsu-gu, Incheon 21990, Republic of Korea.
authors.forename: H
authors.initials: H
authors.lastname: Hwang
authors.affiliation: Korea Polar Research Institute (KOPRI), 26 Songdomirearo, Yeonsu-gu, Incheon 21990, Republic of Korea.
authors.forename: J-H
authors.initials: JH
authors.lastname: Kang
authors.affiliation: Laboratory for Earth Observations and Analyses, ENEA - C.R. Casaccia, I-00123 Rome, Italy.
authors.forename: B
authors.initials: B
authors.lastname: Narcisi
authors.affiliation: Laboratory for Earth Observations and Analyses, ENEA - C.R. Casaccia, I-00123 Rome, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Proposito
authors.affiliation: Laboratory for Earth Observations and Analyses, ENEA - C.R. Casaccia, I-00123 Rome, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Scarchilli
authors.affiliation: Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze, 11/A, Parma, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Selmo
authors.affiliation: Dept. of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia, 3, 50019 Sesto F.no (Florence), Italy.
authors.forename: M
authors.initials: M
authors.lastname: Severi
authors.affiliation: Institute for the Dynamics of Environmental Processes-CNR, Via Torino, 155, 30172 Venice-Mestre, Italy; DAIS, Ca' Foscari University of Venice, Via Torino, 155, Venice-Mestre, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Spolaor
authors.affiliation: DAIS, Ca' Foscari University of Venice, Via Torino, 155, Venice-Mestre, Italy.
authors.forename: B
authors.initials: B
authors.lastname: Stenni
authors.affiliation: Dept. of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia, 3, 50019 Sesto F.no (Florence), Italy.
authors.forename: R
authors.initials: R
authors.lastname: Traversi
authors.affiliation: Dept. of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia, 3, 50019 Sesto F.no (Florence), Italy; ISAC CNR, Via Gobetti 101, 40129, Bologna, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Udisti
mesh_terms: D000336:Aerosols; D000864:Antarctic Regions; D001315:Australia; D004391:Dust / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods*; D046448:Ice Cover / Q000737:chemistry*; D010103:Oxygen Isotopes / Q000032:analysis; D010140:Pacific Ocean; D012621:Seasons; D012914:Snow / Q000737:chemistry*; D013457:Sulfur Compounds / Q000032:analysis
chemical_list: D000336:Aerosols; D004391:Dust; D010103:Oxygen Isotopes; D013457:Sulfur Compounds
keywords: Chemical composition; Dating; East Antarctica; GV7; Seasonal pattern; Snow pit