Prominent features in isotopic, chemical and dust stratigraphies from coastal East Antarctic ice sheet (Eastern Wilkes Land)

被引：15

作者：

Caiazzo, L. ^{[1
]}

Baccolo, G. ^{[2
,3
]}

Barbante, C. ^{[4
,5
]}

Becagli, S. ^{[1
]}

Berto, M. ^{[5
]}

Ciardini, V. ^{[6
]}

Crotti, I. ^{[2
]}

Delmonte, B. ^{[2
]}

Dreossi, G. ^{[5
]}

Frezzotti, M. ^{[6
]}

Gabrieli, J. ^{[5
]}

Giardi, F. ^{[1
]}

Han, Y. ^{[7
]}

Hong, S. -B. ^{[7
]}

Hur, S. D. ^{[7
]}

Hwang, H. ^{[7
]}

Kang, J. -H. ^{[7
]}

Narcisi, B. ^{[6
]}

Proposito, M. ^{[6
]}

Scarchilli, C. ^{[6
]}

Selmo, E. ^{[8
]}

Severi, M. ^{[1
]}

Spolaor, A. ^{[4
,5
]}

Stenni, B. ^{[5
]}

Traversi, R. ^{[1
]}

Udisti, R. ^{[1
,9
]}

机构：

[1] Univ Florence, Dept Chem Ugo Schiff, Via Lastruccia,3, I-50019 Florence, Italy

[2] Univ Milano Bicocca, DISAT, Piazza Sci,1, I-20126 Milan, Italy

[3] Univ Siena, Earth Sci Dept, Via Laterino,8, I-53100 Siena, Italy

[4] CNR, Inst Dynam Environm Proc, Via Torino,155, I-30172 Venice, Italy

[5] Ca Foscari Univ Venice, DAIS, Via Torino,155, Venice, Italy

[6] ENEA CR Casaccia, Lab Earth Observat & Anal, I-00123 Rome, Italy

[7] Korea Polar Res Inst KOPRI, 26 Songdomirearo, Incheon 21990, South Korea

[8] Univ Parma, Dept Chem Life Sci & Environm Sustainabil, Parco Area Sci,11-A, Parma, Italy

[9] ISAC CNR, Via Gobetti 101, I-40129 Bologna, Italy

来源：

CHEMOSPHERE | 2017年 / 176卷

关键词：

Chemical composition; Snow pit; East Antarctica; Dating; Seasonal pattern; GV7; NORTHERN VICTORIA LAND; LASER-INDUCED INCANDESCENCE; BIOGENIC SULFUR-COMPOUNDS; DEUTERIUM EXCESS SIGNAL; SURFACE MASS-BALANCE; BLACK CARBON; TALOS DOME; SPATIAL-DISTRIBUTION; STABLE-ISOTOPES; SNOW;

D O I：

10.1016/j.chemosphere.2017.02.115

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：273 / 287

页数：15

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