Contrasting vegetation productivity responses in arid and humid zones to recent changes in diurnal temperature range

Ziqian Zhong; Hans W. Chen; Bin He; Bo Su

doi:10.59717/j.xinn-geo.2025.100163

The Innovation Geoscience > 2025 Vol. 3 > No. 4 > 100163

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Contrasting vegetation productivity responses in arid and humid zones to recent changes in diurnal temperature range

1.
Department of Space, Earth and Environment, Division of Geoscience and Remote Sensing, Chalmers University of Technology, Gothenburg SE-412 96, Sweden
2.
State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China
3.
Regional Climate Group, Department of Earth Sciences, University of Gothenburg, Gothenburg S-40530, Sweden

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Corresponding author: hans.chen@chalmers.se
Received Date: October 28, 2024

Accepted Date: July 24, 2025

Published Online: August 04, 2025

The Innovation Geoscience 3(4), https://doi.org/10.59717/j.xinn-geo.2025.100163 | Cite this article

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PUBLIC SUMMARY

PUBLIC SUMMARY
1. Diurnal temperature range (DTR) rose across the extratropical Northern Hemisphere during 2002-2021.
  
  In humid zones, DTR increases have promoted vegetation productivity.
  
  Vegetation productivity responds negatively to DTR change in arid zones.
  
  Broadleaf and needleleaf forest ecosystems show contrasting productivity responses to DTR changes.

ABSTRACT

ABSTRACT

Biological and ecological processes regulating the ecosystem carbon cycle exhibit varying sensitivities to temperature fluctuations during the day and night. Consequently, the diurnal temperature range (DTR)—the difference between daily maximum and minimum temperatures—plays an important role in modulating carbon assimilation and consumption in plants. Over recent decades, daytime warming has outpaced nighttime warming over land, leading to a widening of the DTR, which is expected to impact plant productivity. However, how the recent DTR changes have influenced vegetation productivity across various climate zones remains unclear. Using remote sensing data and flux tower measurements from 2002 to 2021, we found divergent impacts of increased DTR on vegetation productivity in the extratropical Northern Hemisphere. In humid zones, summer DTR increases have promoted net primary production (NPP), while the opposite effect is found in arid zones. This contrast can largely be explained by the larger impact of accelerated daytime warming on increased vapor pressure deficit in arid zones, which consequently inhibits NPP. Our findings underscore the non-negligible impacts of recent DTR changes on vegetation productivity, emphasizing the need to consider sub-diurnal variations in assessments of climate change impacts.
- asymmetric warming /
- diurnal temperature range /
- vegetation productivity /
- summer /
- vapor pressure deficit

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Zhong Z., Chen H. W., He B., et al. (2025). Contrasting vegetation productivity responses in arid and humid zones to recent changes in diurnal temperature range. The Innovation Geoscience 3:100163. https://doi.org/10.59717/j.xinn-geo.2025.100163

Zhong Z., Chen H. W., He B., et al. (2025). Contrasting vegetation productivity responses in arid and humid zones to recent changes in diurnal temperature range. The Innovation Geoscience 3:100163. https://doi.org/10.59717/j.xinn-geo.2025.100163

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Contrasting vegetation productivity responses in arid and humid zones to recent changes in diurnal temperature range

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Contrasting vegetation productivity responses in arid and humid zones to recent changes in diurnal temperature range

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