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Spatiotemporal variability of reference evapotranspiration and its contributing climatic factors in Yunnan Province, SW China, 1961–2004

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  • Ze-Xin Fan
  • Axel Thomas

Abstract

Evapotranspiration is an important flux term in the water cycle that integrates atmospheric demand and surface conditions. Using the FAO Penman–Monteith method, we calculated monthly reference evapotranspiration (ET0) for 119 stations during 1961–2004 over Yunnan Province (YP), southwest China. Linear trend analysis shows that area-averaged annual and seasonal ET0 rates declined, with most remarkable decreases during pre-monsoon (−1.5 mm decade −1 , Mar–May) and monsoon (−0.6 mm decade −1 , Jun–Aug) seasons. Most of the stations with negative trends were concentrated in the eastern and northern parts of YP. Over the 44–year period, wind speed (WS), relative sunshine duration (SD) and relative humidity (RH) all showed decreasing trends, whereas maximum temperature (TMX) increased slightly. Multivariate regression analysis indicated that the variability of ET0 rates is most sensitive to the variations of SD, followed by RH, TMX and WS. The temporal evolution of these contributing factors was not stable during the study period, with an increasing contribution of SD and a decreasing contribution of TMX after the 1970s. Temporally changing contributions of climatic variables to ET0 should be taken into account when evapotranspiration rates are calculated with equations that rely on parameterization of climatic variables. Linking the changing contributions of climatic variables to ET0 rates to circulation features may help to better understand how ET0 responds to regional climatic change. Copyright Springer Science+Business Media B.V. 2013

Suggested Citation

  • Ze-Xin Fan & Axel Thomas, 2013. "Spatiotemporal variability of reference evapotranspiration and its contributing climatic factors in Yunnan Province, SW China, 1961–2004," Climatic Change, Springer, vol. 116(2), pages 309-325, January.
    • Handle: RePEc:spr:climat:v:116:y:2013:i:2:p:309-325
    DOI: 10.1007/s10584-012-0479-4
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    Cited by:

    1. Mohammad Kousari & Mohammad Asadi Zarch & Hossein Ahani & Hemila Hakimelahi, 2013. "A survey of temporal and spatial reference crop evapotranspiration trends in Iran from 1960 to 2005," Climatic Change, Springer, vol. 120(1), pages 277-298, September.
    2. Michelle Haynes & King-Jau Kung & Jodi Brandt & Yang Yongping & Donald Waller, 2014. "Accelerated climate change and its potential impact on Yak herding livelihoods in the eastern Tibetan plateau," Climatic Change, Springer, vol. 123(2), pages 147-160, March.
    3. Zhaoqi Zeng & Wenxiang Wu & Zhaolei Li & Yang Zhou & Han Huang, 2019. "Quantitative Assessment of Agricultural Drought Risk in Southeast Gansu Province, Northwest China," Sustainability, MDPI, vol. 11(19), pages 1-21, October.
    4. Liu, Wenna & Chen, Hongsong & Zou, Qiaoyun & Nie, Yunpeng, 2021. "Divergent root water uptake depth and coordinated hydraulic traits among typical karst plantations of subtropical China: Implication for plant water adaptation under precipitation changes," Agricultural Water Management, Elsevier, vol. 249(C).
    5. Jiang, Shouzheng & Liang, Chuan & Cui, Ningbo & Zhao, Lu & Du, Taisheng & Hu, Xiaotao & Feng, Yu & Guan, Jing & Feng, Yi, 2019. "Impacts of climatic variables on reference evapotranspiration during growing season in Southwest China," Agricultural Water Management, Elsevier, vol. 216(C), pages 365-378.
    6. Xu Yang & Ruishan Chen & Guangxing Ji & Chao Wang & Yuanda Yang & Jianhua Xu, 2021. "Assessment of Future Water Yield and Water Purification Services in Data Scarce Region of Northwest China," IJERPH, MDPI, vol. 18(17), pages 1-17, August.
    7. Zhang, Lei & Traore, Seydou & Cui, Yuanlai & Luo, Yufeng & Zhu, Ge & Liu, Bo & Fipps, Guy & Karthikeyan, R. & Singh, Vijay, 2019. "Assessment of spatiotemporal variability of reference evapotranspiration and controlling climate factors over decades in China using geospatial techniques," Agricultural Water Management, Elsevier, vol. 213(C), pages 499-511.
    8. Zeeshan Shirazi & Huadong Guo & Fang Chen & Bo Yu & Bin Li, 2017. "Assessing the impact of climatic parameters and their inter-annual seasonal variability on fire activity using time series satellite products in South China (2001–2014)," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 85(3), pages 1393-1416, February.

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