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Related Concept Videos

The Carbon Cycle01:14

The Carbon Cycle

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Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
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Related Experiment Video

Updated: Jun 13, 2025

Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions
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Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions

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Slowdown in China's methane emission growth.

Min Zhao1, Xiangjun Tian1,2, Yilong Wang1

  • 1State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China.

National Science Review
|September 12, 2024
PubMed
Summary

China

Keywords:
ChinaGlobal ObservatioN-based system for monitoring Greenhouse GAses for methanedata assimilationgreenhouse gasesmethane emissions

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Area of Science:

  • Atmospheric chemistry and environmental science.
  • Climate change and greenhouse gas monitoring.

Background:

  • Global methane levels are rising, with China as a key emitter.
  • China's emission reduction efforts require clear impact assessment.

Purpose of the Study:

  • To assess changes in China's methane emissions using a novel monitoring system.
  • To evaluate the effectiveness of China's methane mitigation policies.

Main Methods:

  • Development of the Global ObservatioN-based system for monitoring Greenhouse GAses for methane (GONGGA-CH4).
  • Assimilation of satellite-based Greenhouse gases Observing Satellite (GOSAT) methane observations (XCH4).
  • Analysis of methane emission trends in China from 2011-2021.

Main Results:

  • China's methane emission growth rate slowed significantly between 2016-2021 compared to 2011-2015.
  • This slowdown contrasts with accelerating global methane emissions.
  • Reduced biogenic emissions from agriculture and wetlands, not fossil fuels, drove the decrease.

Conclusions:

  • The GONGGA-CH4 system offers an independent atmospheric perspective on China's methane emissions.
  • Findings provide insights into policy implementation for climate objectives.
  • China's contribution to global methane emissions has notably decreased.