Hygroscopic mineral dust particles as influenced by chlorine chemistry in the marine atmosphere

Yutaka Tobo; Daizhou Zhang; Naonobu Nakata; Maromu Yamada; Hiroko Ogata; Kazutaka Hara; Yasunobu Iwasaka

doi:10.1029/2008GL036883

Hygroscopic mineral dust particles as influenced by chlorine chemistry in the marine atmosphere

Yutaka Tobo, Daizhou Zhang, Naonobu Nakata, Maromu Yamada, Hiroko Ogata, Kazutaka Hara, Yasunobu Iwasaka

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

Morphology and elemental compositions of individual dust particles were investigated with the use of Asian dust samples collected at a site along the Sea of Japan side of the archipelago. Our results indicate the preferential formation of chloride in Ca-containing dust particles (0.1 < Cl/Ca < 0.65) in cases when the particles contain little or no sulfate. Most of them are in an amorphous state and nearly spherical even under high vacuum. A likely explanation for the results is that highly soluble salts such as calcium chloride (CaCl₂) are formed as a result of heterogeneous reactions of dust particles with chloride precursor gases (mostly, HCl) in the marine atmosphere. The chloride formation is expected to play an important role in enhancing the hygroscopicity of dust particles.

Original language	English
Article number	L05817
Journal	Geophysical Research Letters
Volume	36
Issue number	5
DOIs	https://doi.org/10.1029/2008GL036883
Publication status	Published - 2009 Mar 16
Externally published	Yes

ASJC Scopus subject areas

Earth and Planetary Sciences(all)
Geophysics

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title = "Hygroscopic mineral dust particles as influenced by chlorine chemistry in the marine atmosphere",

abstract = "Morphology and elemental compositions of individual dust particles were investigated with the use of Asian dust samples collected at a site along the Sea of Japan side of the archipelago. Our results indicate the preferential formation of chloride in Ca-containing dust particles (0.1 < Cl/Ca < 0.65) in cases when the particles contain little or no sulfate. Most of them are in an amorphous state and nearly spherical even under high vacuum. A likely explanation for the results is that highly soluble salts such as calcium chloride (CaCl2) are formed as a result of heterogeneous reactions of dust particles with chloride precursor gases (mostly, HCl) in the marine atmosphere. The chloride formation is expected to play an important role in enhancing the hygroscopicity of dust particles.",

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T1 - Hygroscopic mineral dust particles as influenced by chlorine chemistry in the marine atmosphere

AU - Tobo, Yutaka

AU - Zhang, Daizhou

AU - Nakata, Naonobu

AU - Yamada, Maromu

AU - Ogata, Hiroko

AU - Hara, Kazutaka

AU - Iwasaka, Yasunobu

PY - 2009/3/16

Y1 - 2009/3/16

N2 - Morphology and elemental compositions of individual dust particles were investigated with the use of Asian dust samples collected at a site along the Sea of Japan side of the archipelago. Our results indicate the preferential formation of chloride in Ca-containing dust particles (0.1 < Cl/Ca < 0.65) in cases when the particles contain little or no sulfate. Most of them are in an amorphous state and nearly spherical even under high vacuum. A likely explanation for the results is that highly soluble salts such as calcium chloride (CaCl2) are formed as a result of heterogeneous reactions of dust particles with chloride precursor gases (mostly, HCl) in the marine atmosphere. The chloride formation is expected to play an important role in enhancing the hygroscopicity of dust particles.

AB - Morphology and elemental compositions of individual dust particles were investigated with the use of Asian dust samples collected at a site along the Sea of Japan side of the archipelago. Our results indicate the preferential formation of chloride in Ca-containing dust particles (0.1 < Cl/Ca < 0.65) in cases when the particles contain little or no sulfate. Most of them are in an amorphous state and nearly spherical even under high vacuum. A likely explanation for the results is that highly soluble salts such as calcium chloride (CaCl2) are formed as a result of heterogeneous reactions of dust particles with chloride precursor gases (mostly, HCl) in the marine atmosphere. The chloride formation is expected to play an important role in enhancing the hygroscopicity of dust particles.

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