Rapid changes of precipitation pH in Qinghai Province, the northeastern Tibetan Plateau

David D. ZHANG, Chi Yung JIM, M.R. PEART, Changxing SHI

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32 Citations (Scopus)

Abstract

Rainfall monitoring programs were conducted in two industrial cities of China's Qinghai Province, Xining and Germu, in some periods of the 1980s and 1990s. The results show that the natural precipitation in this area is originally alkaline. Compared with the late 1980s records, pH values declined significantly from approximately 8 in the 1980s to below 7 in mid-1990s. Such rapid and drastic changes were attributed to fast industrial development that released a large amount of pollutants. Subsequent tough control on pollutant emission partly restored pH values back to above 7 in the late 1990s. The pH and rainfall chemical analyses indicate that alkaline rain in this continental arid region is caused by airborne dusts which originate from local alkaline soils. With decrease of pH value, the total ionic concentration of rainwater is increased because acids were added to the rainwater. Copyright © 2002 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)241-248
JournalScience of the Total Environment
Volume305
Issue number1-3
DOIs
Publication statusPublished - 15 Apr 2003

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Rain
plateau
rainwater
Arid regions
rainfall
industrial development
arid region
Dust
dust
Soils
Acids
pollutant
Monitoring
acid
monitoring
pH-value
province
soil
city
chemical

Citation

Zhang, D. D., Jim, C. Y., Peart, M. R., & Shi, C. (2003). Rapid changes of precipitation pH in Qinghai Province, the northeastern Tibetan Plateau. Science of The Total Environment, 305(1-3), 241-248. doi: 10.1016/S0048-9697(02)00464-3

Keywords

  • Precipitation pH
  • Precipitation chemistry
  • Alkaline rain
  • Air pollutant
  • Air dust