Salt inclusions in polar ice core: Location and chemical form of water-soluble impurities

Ohno, Hiroshi; Igarashi, Makoto; Hondoh, Takeo

doi:10.1016/j.epsl.2005.01.001

Cited by 83 publications

(151 citation statements)

References 21 publications

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“…The method is based on two assumptions about salt-formation priority: (1) sulphate has the highest salt-formation priority due to vaporisation of HNO 3 and HCl (Legrand and Delmas, 1988b;Ro¨thlisberger et al, 2003) and (2) nitrate has a higher salt-formation priority than chloride (Kerminen et al, 2000). For the Dome Fuji ice core (inland Antarctica), the deduced salt concentrations agreed well with the major salts identified from direct measurements of impurities in ice by Raman spectroscopy (Ohno et al, 2005(Ohno et al, , 2006.…”

Section: Introductionsupporting

confidence: 56%

Spatial distributions of soluble salts in surface snow of East Antarctica

Iizuka¹,

Ohno²,

Uemura³

et al. 2016

Tellus B: Chemical and Physical Meteorology

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A B S T R A C TTo better understand how sea salt reacts in surface snow of Antarctica, we collected and identified non-volatile particles in surface snow along a traverse in East Antarctica. Samples were obtained during summer 2012/2013 from coastal to inland regions within 698S to 808S and 398E to 458E, a total distance exceeding 800 km. The spatial resolution of samples is about one sample per latitude between 1500 and 3800 m altitude. Here, we obtain the atomic ratios of Na, S and Cl, and calculate the masses of sodium sulphate and sodium chloride. The results show that, even in the coast snow sample (698S), sea salt is highly modified by acid (HNO 3 or H 2 SO 4 ). The fraction of sea salt that reacts with acid increases in the region from 708S to 748S below 3000 m a.s.l., where some NaCl remains. At the higher altitudes (above 3300 m a.s.l.) in the inland region (748S to 808S), the reaction uses almost all of the available NaCl.

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Section: Introductionsupporting

confidence: 56%

Spatial distributions of soluble salts in surface snow of East Antarctica

Iizuka¹,

Ohno²,

Uemura³

et al. 2016

Tellus B: Chemical and Physical Meteorology

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“…37 The strongest SO 4 2-band is in both cases located at 989 cm -1 (symmetrical stretching mode), including the weaker modes maximizing at 1117 and 1071 cm -1 . This suggests that micro inclusions of MgSO 4 salt preserved inside ice cores at low temperature to some extent contain MgSO 4 · 11H 2 O salt.…”

Section: Resultsmentioning

confidence: 99%

Crystallization and Characterization of a New Magnesium Sulfate Hydrate MgSO₄·11H₂O

Genceli

Lutz

Spek

et al. 2007

Crystal Growth & Design

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ABSTRACT:The MgSO 4 crystal hydrate formed below approximately 0°C was proven to be the undecahydrate, MgSO 4 · 11H 2 O (meridianiite) instead of the reported dodecahydrate MgSO 4 · 12H 2 O. The crystals were grown from solution by eutectic freeze and by cooling crystallization. The crystal structure analysis and the molecular arrangement of these crystals were determined using single crystal X-ray diffraction (XRD). Reflections were measured at a temperature of 110(2) K. The structure is triclinic with space group P j 1 (No. 2). The crystal is a colorless block with the following parameters F.W. ) 318.55, 0.54 × 0.24 × 0.18 mm 3 , a ) 6.72548 (7)

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“…DMS is produced by processes involving phytoplankton, and it is highly volatile and released to the atmosphere. 11,12 In ice cores, MSA is deposited as methanesulfonate salts 13 rather than in acid form, probably due to its fixation on alkaline particles of marine or continental origin during the glacial period.…”

Section: Introductionmentioning

confidence: 99%

Crystallization and Characterization of Magnesium Methanesulfonate Hydrate Mg(CH₃SO₃)₂·12H₂O

Güner

Lutz

Sakurai

et al. 2010

Crystal Growth & Design

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Records of methanesulfonate acid in ice cores play an important role in reconstruction of the past history of marine productivity, sea ice extent, and major El Niño event activities related to climate changes. Considering the lack of thermodynamic and crystal structure data, crystallization conditions below zero degrees Celsius were mimicked in the laboratory, and magnesium methanesulfonic hydrate crystals, Mg(CH 3 SO 3 ) 2 3 12H 2 O (i.e., [Mg(H 2 O) 6 ](CH 3 SO 3 ) 2 3 6H 2 O) were grown from solution by cooling crystallization and by eutectic freeze crystallization. The solubility lines between -5 and þ21°C and between 0 and 25 wt % are presented. The eutectic point of the system is detected at -5°C and 14 wt %. The crystal structure analysis and the molecular arrangement of these crystals were determined using single crystal X-ray diffraction (XRD). Reflections were measured at a temperature of 110(2) K. The structure is trigonal with space group R3 (no. 148). The crystal is a colorless block with the following parameters: a = b = 9.27150 (8) . The Raman spectrum of Mg(CH 3 SO 3 ) 2 3 12H 2 O salt has been recorded and the principal absorption modes identified. Thermogravimetric analysis confirmed the stochiometry of the Mg(CH 3 SO 3 ) 2 3 12H 2 O salt.

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Salt inclusions in polar ice core: Location and chemical form of water-soluble impurities

Cited by 83 publications

References 21 publications

Spatial distributions of soluble salts in surface snow of East Antarctica

Spatial distributions of soluble salts in surface snow of East Antarctica

Crystallization and Characterization of a New Magnesium Sulfate Hydrate MgSO₄·11H₂O

Crystallization and Characterization of Magnesium Methanesulfonate Hydrate Mg(CH₃SO₃)₂·12H₂O

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Salt inclusions in polar ice core: Location and chemical form of water-soluble impurities

Cited by 83 publications

References 21 publications

Spatial distributions of soluble salts in surface snow of East Antarctica

Spatial distributions of soluble salts in surface snow of East Antarctica

Crystallization and Characterization of a New Magnesium Sulfate Hydrate MgSO4·11H2O

Crystallization and Characterization of Magnesium Methanesulfonate Hydrate Mg(CH3SO3)2·12H2O

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Crystallization and Characterization of a New Magnesium Sulfate Hydrate MgSO₄·11H₂O

Crystallization and Characterization of Magnesium Methanesulfonate Hydrate Mg(CH₃SO₃)₂·12H₂O