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Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
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Related Experiment Video

Updated: Sep 24, 2025

A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function
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Interannual variability in summer climate change controls GPP long-term changes.

Panxing He1, Xiaoliang Ma2, Zongjiu Sun1

  • 1Ministry of Education Key Laboratory for Western Arid Region Grassland Resources and Ecology, College of Grassland Sciences, Xinjiang Agricultural University, Urumqi, 830052, China.

Environmental Research
|May 6, 2022
PubMed
Summary
This summary is machine-generated.

Interannual climate variability significantly impacts seasonal vegetation growth and gross primary productivity (GPP). Summer climate variations are crucial for annual GPP, particularly in Chinese grasslands, overriding other environmental factors.

Keywords:
Climate changeComprehensive attribution analysisGross primary productivityInterannual variabilityMsTMIP

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Area of Science:

  • Ecology
  • Environmental Science
  • Climate Science

Background:

  • Global environmental change impacts terrestrial vegetation dynamics and ecosystem services.
  • Understanding vegetation response to environmental change is critical, yet seasonal contributions are understudied.

Purpose of the Study:

  • To investigate the relative contributions of long-term and interannual climate variability to vegetation gross primary productivity (GPP) changes.
  • To identify key seasons and environmental drivers influencing GPP dynamics across China's grasslands from 1901-2010.

Main Methods:

  • Utilized four terrestrial ecosystem models from the Multi-scale Synthesis and Terrestrial Models (MsTMIP) project.
  • Analyzed four key environmental drivers impacting GPP over a 110-year period (1901-2010).

Main Results:

  • Interannual climate variability was the primary driver of seasonal GPP variability across all seasons.
  • Summer GPP variations, driven by long-term trends and interannual variability, explained 61.50% of Chinese grassland GPP changes.
  • Interannual summer climate variability surpassed CO2 fertilization and nitrogen deposition effects on long-term GPP variation (over 40% contribution).

Conclusions:

  • Interannual climate variability plays a pivotal role in shaping vegetation growth seasonality.
  • Findings underscore the significance of climate variability in driving vegetation changes and provide a basis for attributing future global vegetation shifts.