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西太平洋热带海域降水化学特征 被引量:29

CHEMICAL CHARACTERISTICS OF TROPICAL WESTERN PACIFIC PRECIPITATION
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摘要 1988年在西太平洋热带海域采集雨水样品,分析结果表明,大部分样品偏酸性(pH<5.6).雨水的化学组成结构主要受海盐的影响,这与我国大陆上雨水的情况很不相同.将西太平洋热带海域降水化学特征与南印度海域和西大西洋海域的降水情况作对比分析,结果表明,前两个海域雨水中的SO^(2-)受非海盐源的影响比西大西洋海域的小. The wet-only marine precipitation samples of 46 from the Tropical Western Pacific Area (TWPA) were collected during a period of September 26 to October 27, 1988. The analyzed results indicated that the rainwater was acidic with an arithmetic mean pH of 5.30, a volume-weighted mean (VWM) pH of 5. 05, and a pH range of 3. 86 to 7. 02. There were two thirds of the samples with pH<5.60. The chemical components of rainwater in TWPA were dominated mainly by sea salt, but they were not simply diluted seawater solutions. The kind of construction of chemical components was different from that from inland area of China. Chemical comparison of the precipitation from TWPA with those in the Southern Indian Ocean Area (SIOA) and with those from Western Atlantic Area (WAA) demonstrated that the mean pH value, the total concentrations of anions and cations in rainwater from TWPA were the highest, followed by those from SIOA. About one thirds of the SO_4~2- Concentrations in the rainwaters from TWPA and SIOA and nearly half of the SO_4~2- in the rainwater from WAA were contributed by non-sea-salt origins, which indicates that the influences of external origins on the SO_4~2- concentrations in rainwaters from TWPA and SIOA are smaller than that in WAA.
出处 《环境科学学报》 CAS CSSCI CSCD 北大核心 1993年第2期143-149,共7页 Acta Scientiae Circumstantiae
关键词 海洋 降水 非海盐源 热带海域 酸雨 marine precipitation pH non-sea-salt.
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参考文献6

  • 1沈志来,黄美元,吴玉霞,何珍珍,邵德明,沈爱华,张维.上海地区云水和雨水酸度及化学组分分析[J].大气科学,1989,13(4):460-466. 被引量:11
  • 2程春明,酸雨文集,1989年
  • 3王瑞斌,酸雨文集,1989年
  • 4黄美元,大气科学,1988年,12卷,4期,389页
  • 5沈志来,大气科学,1988年,特刊,328页
  • 6初次平,大气和海洋化学,1986年

二级参考文献4

  • 1黄美元,大气科学,1988年,12卷,4期,389页
  • 2刘帅仁,大气科学,1988年,特刊,245页
  • 3沈志来,大气科学,1987年,12卷,1期,99页
  • 4程运林,酸雨,1985年,3期,12页

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