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The chemical forms of water-soluble microparticles preserved in the Antarctic ice sheet during Termination I
| Title: | The chemical forms of water-soluble microparticles preserved in the Antarctic ice sheet during Termination I |
| Authors: | Sakurai, Toshimitsu Browse this author | | Ohno, Hiroshi Browse this author | | Horikawa, Shinichiro Browse this author | | Iizuka, Yoshinori Browse this author →KAKEN DB | | Uchida, Tsutomu Browse this author →KAKEN DB | | Hirakawa, Kazuomi Browse this author →KAKEN DB | | Hondoh, Takeo Browse this author →KAKEN DB |
| Issue Date: | Dec-2011 |
| Publisher: | International Glaciological Society |
| Journal Title: | Journal of Glaciology |
| Volume: | 57 |
| Issue: | 206 |
| Start Page: | 1027 |
| End Page: | 1032 |
| Publisher DOI: | 10.3189/002214311798843403 |
| Abstract: | This study clarifies changes in the chemical forms of microparticles during Termination I, the period of drastic climate change between the Last Glacial Maximum (LGM) and the Holocene. We determine the chemical forms of individual water-soluble microparticles through micro-Raman spectroscopy and compare the relative frequencies of different types with the ion concentrations in melted ice. Micro-Raman spectroscopy shows that Na2SO4・10H2O and MgSO4・11H2O are abundant in Holocene ice, while CaSO4・2H2O and other salts are abundant in LGM ice. Further, the number of CaSO4・2H2O particles is strongly correlated with the concentration of Ca2+ during Termination I. Taken together, the evidence strongly suggests that most of the Ca2+ exists as CaSO4・2H2O. The different compositions of microparticles from the Holocene and LGM can be explained by ion balance arguments. |
| Rights: | © 2011 International Glaciological Society |
| Relation: | http://www.igsoc.org/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/49346 |
| Appears in Collections: | 低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 本堂 武夫
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