New Research Reveals Crucial Insights into Climate Change Impacts on the Loess Plateau

Strategic Insights -

Research led by investigators at Shaanxi Normal University has shed light on the critical role of the Loess Plateau in China's grain and energy production. The study, funded by the National Natural Science Foundation of China and other institutions, aimed to understand the spatio-temporal variations and driving factors of gross primary productivity (GPP) and evapotranspiration (ET) in this vital area. The findings have significant implications for optimizing ecological restoration strategies and effectively managing water resources.

Key Takeaways:

  • The average annual GPP and ET for the entire Loess Plateau are 430.5 +/- 58.7 g C m-2 yr-1 and 359.2 +/- 29.4 mm yr-1, respectively, with soil evaporation accounting for the largest proportion of ET (42.7 %).
  • Both GPP and ET have significantly increased at rates of 5.3 g C m-2 and 2.3 mm annually, with the increase in ET mainly driven by vegetation transpiration.
  • Vegetation greening is the dominant factor influencing GPP and ET changes, particularly after 2000, while climate factors, including precipitation and temperature, also contribute to these increases.
  • Flux changes in grasslands and croplands are dominant drivers of increased total GPP and ET across the Loess Plateau, with regions I and II contributing the most to these increases, particularly in the recent decade.
  • The research provides valuable insights into optimizing ecological restoration strategies and balancing carbon-water dynamics in arid and semi-arid regions.

Statistics:

  • GPP: 430.5 +/- 58.7 g C m-2 yr-1
  • ET: 359.2 +/- 29.4 mm yr-1
  • Soil evaporation proportion: 42.7
  • Rate of increase in GPP: 5.3 g C m-2 annually
  • Rate of increase in ET: 2.3 mm annually

Sources:

  • NewsRx. New Climate Change Data Have Been Reported by Researchers at Shaanxi Normal University (Regional Variations In Vegetation Greening and Climate Change Impacts On Gross Primary Productivity and Evapotranspiration In the Loess Plateau). Global Warming Focus. October 20, 2025; p 516
  • Regional Variations In Vegetation Greening and Climate Change Impacts On Gross Primary Productivity and Evapotranspiration In the Loess Plateau. Agricultural and Forest Meteorology, 2025; 373