Japan Geoscience Union Meeting 2016

Presentation information

Oral

Symbol A (Atmospheric and Hydrospheric Sciences) » A-CG Complex & General

[A-CG24] Science in the Arctic Region

Thu. May 26, 2016 1:45 PM - 3:15 PM 304 (3F)

Convener:*Takao Kawasaki(National Institute of Polar Research), Masato Mori(Atmosphere and Ocean Research Institute, University of Tokyo), Hisashi Sato(Department of Environmental Geochemical Cycle Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)), Shun Tsutaki(Arctic Environmental Research Center, National Institute of Polar Research), Hiroyasu Hasumi(Atmosphere and Ocean Research Institute, The University of Tokyo), Chair:Hisashi Sato(Department of Environmental Geochemical Cycle Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)), Shun Tsutaki(Arctic Environmental Research Center, National Institute of Polar Research)

2:15 PM - 2:30 PM

[ACG24-14] Scanning Electron Microscopy (SEM) analysis of Black Carbon in Arctic snow

*Naoko Nagatsuka1, Ramona Valentina Mateiu2, Kumiko Goto-Azuma1,3, Yoshimi Ogawa-Tsukagawa1, Konosuke Sugiura4, Hiroyuki Enomoto1,3, Teruo Aoki5 (1.National Institute of Polar Research, 2.Technical University of Denmark, 3.SOKENDAI (The Graduate University for Advanced Studies), 4.University of Toyama, 5.Meteorological Research Institute)

Keywords:Black Carbon, SEM, Arctic Snow

Snow and ice on glaciers in Arctic contain various atmospheric depositions, such as soot (black carbon) and mineral dusts. These light-absorbing impurities can reduce surface albedo and affect melting of glaciers. Thus, it is important to understand optical characteristics of the impurities on Arctic glaciers. In this study, we analyzed structure and surface chemistry of black carbon collected from snow in several Arctic regions (Siberia, Alaska, Greenland, and Sapporo) with Scanning Electron Microscope (SEM, QUANTA FEG 450) and Energy Dispersive X-ray Spectrometer (EDS).
Microscopic observation revealed that snow samples from Alaska, Greenland and Sapporo contained black carbon particles with chain-like structures and compact aggregate structures as shown in Scarnato et al. (2013). However, the proportion of these black carbon structures were different among the samples. For example, snow from Greenland contained higher abundance of chain particles, while that from Alaska contained higher compact particles coated by membrane like material.