Variations of precipitation characteristics during the period 1960–2014 in the source region of the Yellow River, China

  • Mudassar Iqbal
  • Jun Wen
  • Shaoping Wang
  • Hui Tian
  • Muhammad Adnan
Article
  • 16 Downloads

Abstract

Precipitation, a natural feature of weather systems in the Earth, is vitally important for the environment of any region. Under global climate change condition, the characteristics of precipitation have changed as a consequence of enhanced global hydrological cycle. The Source Region of the Yellow River (SRYR), locating within the Qinghai-Tibet Plateau, is sensitive to the global climate change due to its complex orography and fragile ecosystem. To understand the precipitation characteristics and its impacts on the environment in the region, we studied the characteristics of rainy days and precipitation amount of different precipitation classes, such as light (0–5 and 5–10 mm), moderate (10–15, 15–20 and 20–25 mm) and heavy (≥25 mm) rains by analyzing the precipitation data of typical meteorological stations in the SRYR during the period 1961–2014, as well as the trends of persistent rainfall events and drought events. Results showed that annual average precipitation in this area has a non-significant (P>0.05) increasing trend, and 82.5% of the precipitation occurred from May to September. Rainy days of the 0–5 mm precipitation class significantly decreased, whereas the rainy days of 5–10, 10–15, and 20–25 mm precipitation classes increased and that of ≥25 mm precipitation class decreased insignificantly. The persistent rainfall events of 1- or 2-day and more than 2-day showed an increasing trend, with the 1- or 2-day events being more frequent. Meanwhile, the number of short drought periods (≥10 days) increased while long drought periods (>10 days) decreased. Since the 0–5 mm precipitation class has huge impact on the grasslands productivity; the 5–10, 10–15, and 20–25 mm precipitation classes have positive effects on vegetation which rely on deep soil water through moving nutrients and water into the root zone of these vegetation or through plant-microbe interactions; the ≥25 mm precipitation class contributes to the floods; and more persistent rainfall events and fewer long drought events infer positive effects on agriculture, these results indicate grassland degradation, less risk of floods, and the upgrading impact of climate change on agriculture. This study can provide scientific knowledge for policymakers to sustain the eco-environmental resources in the SYSR.

Keywords

precipitation characteristics climate change ecosystem water resources vegetation Source Region of the Yellow River 

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Notes

Acknowledgements

This study was supported by the National Natural Science Foundation of China (41530529, 41375022, 41575013) and the Key Research Program of the Chinese Academy of Sciences (KZZD-EW-13). The authors thank to the editor and anonymous reviewers for their professional and pertinent comments and revision suggestions which are greatly helpful for further quality improvement of this manuscript.

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Copyright information

© Xinjiang Institute of Ecology and Geography, the Chinese Academy of Sciences and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Mudassar Iqbal
    • 1
    • 2
  • Jun Wen
    • 3
  • Shaoping Wang
    • 2
    • 4
  • Hui Tian
    • 1
  • Muhammad Adnan
    • 2
    • 5
  1. 1.Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouChina
  2. 2.University of Chinese Academy of SciencesBeijingChina
  3. 3.College of Atmospheric Sciences, Chengdu University of Information TechnologyPlateau Atmosphere and Environment Key Laboratory of Sichuan ProvinceChengduChina
  4. 4.Division of Hydrology Water-Land Resources in Cold and Arid Regions, Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouChina
  5. 5.State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouChina

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