Japan Geoscience Union Meeting 2016

Presentation information


Symbol A (Atmospheric and Hydrospheric Sciences) » A-CC Cryospheric Sciences & Cold District Environment

[A-CC20] Glaciology

Wed. May 25, 2016 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall HALL6)

Convener:*Tetsuo Ohata(Arctic Environment Research Center, National Institute of Polar Research), Masahiro Hori(Earth Observation Reseacrh Center, Japan Aerospace Exploration Agency), kazuyoshi suzuki(Japan Agency for Marine-Earth Science and Technology), Shin Sugiyama(Institute of Low Temperature Science, Hokkaido University)

5:15 PM - 6:30 PM

[ACC20-P07] Estimation of sulfur source contribution to sulfate aerosol in surface snow in East Antarctica using sulfur isotope analysis

*Ryu Uemura1, Kosuke Masaka1, Kotaro FUKUI2, Yoshinori Iizuka3, Motohiro Hirabayashi4, Hideaki Motoyama4 (1.University of the Ryukyus, 2.Tateyama Caldera Sabo Museum, 3.Institute of Low Temperature Science, Hokkaido University, 4.National Institute of Polar Research)

Keywords:sulfate aerosol, Antarctica, sulfur isotope

Sulfur stable isotope ratio (δ34S) of sulfate aerosol provides important information to assess contributions from various sources. Despite several observations in Antarctica, spatial distribution of sulfur isotopes in Antarctica, however, still remain unclear. Here, we present the first sulfur isotope data of surface snow along latitudinal transect in east Dronning Maud land, East Antarctica. The δ34S values showed homogeneous values without significant relationship between δ34S and latitudes, suggesting that isotopic fractionation during transportation is insignificant. Based on the δ34S value and ion concentrations, the contribution of marine biogenic sulfur to sulfate aerosol is dominant.