Spatial differences of chemical features of atmospheric deposition between rainy season and winter in the areas facing to the Japan Sea, Japan

被引:10
作者
Fukuzaki, N
Oshio, T
Noguchi, I
Matsumoto, M
Morisaki, S
Oohara, M
Tamaki, M
Hiraki, T
机构
[1] Niigata Prefectural Res Lab Hlth & Environm, Niigata 95021, Japan
[2] Chiba Prefectural Inst Environm Sci, Ichihara, Japan
[3] Hokkaido Inst Environm Sci, Sapporo, Hokkaido, Japan
[4] Nara Prefectural Inst Publ Hlth, Nara, Japan
[5] Oita Prefectural Inst Hlth & Environm, Oita, Japan
[6] Hiroshima Prefectural Inst Publ Hlth & Environm, Minami Ku, Hiroshima, Japan
[7] Environm Sci Inst Hyogo Prefecture, Suma Ku, Kobe, Hyogo 654, Japan
关键词
D O I
10.1016/S0045-6535(98)00189-1
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Atmospheric deposition was collected using filtrating bulk samplers at 32 sites in the areas facing to the Japan Sea(AFJS) from April 1991 to March 1994. The data were analyzed for winter(January and February) and the rainy season(June and July) when the climate is just the opposite. The AFJS was geographically divided into five areas, that is western Tohoku(WT), Hokuriku(HR), eastern San-in(ES), western San-in(WS) and northern Kyushu(NK). WT, HR and ES receive more precipitation than other regions in winter. H+ depositions increase in winter except NK. This is mainly due to high winter H+ concentrations. In spite of large amounts of precipitation in WT, HR and ES in winter, nss-SO42- concentration was nearly equal to the average throughout Japan. Namely, nss-SO42- depositions in these areas were nearly twice the national mean. In WT, HR and ES, nss-Ca2+ concentrations in winter are lower than the average of the whole country(less than the half). This may be the cause of the lower potentials of neutralization and the higher remaining acid concentrations in WT, HR and ES than NK and WS. (C) 1998 Elsevier Science Ltd. All rights reserved.
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页码:411 / 423
页数:13
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