Spatial and Temporal Variations of Atmospheric CH4 in Monsoon Asia Detected by Satellite Observations of GOSAT and TROPOMI

Article Computer Science, Information Systems

Global land 1° mapping dataset of XCO2 from satellite observations of GOSAT and OCO-2 from 2009 to 2020

Mengya Sheng et al.

Summary: A global mapping data of atmospheric carbon dioxide concentrations based on satellite observations can help understand the spatiotemporal variations of CO2 and support studies related to the carbon cycle and anthropogenic CO2 emissions.

BIG EARTH DATA (2023)

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Article Environmental Sciences

Quantifying factory-scale CO2/CH4 emission based on mobile measurements and EMISSION-PARTITION model: cases in China

Tianqi Shi et al.

Summary: The development of measurement-based carbon accounting means is crucial in complementing traditional inventory compilation. Mobile CO2/CH4 measurement offers a flexible approach to inspect plant-scale emissions without prior factory notification. In 2021, our team conducted field campaigns in two cities and one industrial park in China, totaling 1143 km, using a vehicle-based monitoring system. Additionally, we developed EMISSION-PARTITION, a model based on sample concentrations, which utilizes intelligent algorithms and interior point penalty function to determine optimal emission intensity and dispersion parameters. The performance evaluation in chemical, coal washing, and waste incineration plants showcased strong correlations (greater than 0.76) and low RMSE (less than 11.7 mg m(-3)) even with limited samples (25). This study highlights the wide applications of vehicle-based monitoring systems in detecting greenhouse gas emission sources.

ENVIRONMENTAL RESEARCH LETTERS (2023)

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Article Environmental Sciences

COVID-19 slowdown induced improvement in air quality in India: rapid assessment using Sentinel-5P TROPOMI data

Mukunda D. Behera et al.

Summary: The COVID-19 lock/slow down played a significant role in improving air quality indicators in India, while the relaxation in 2021 led to deterioration compared to 2020. The study identified pyrogenic and agricultural sources as contributing factors to changes in air quality indicators over India.

GEOCARTO INTERNATIONAL (2022)

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Article Environmental Sciences

Spatiotemporal Geostatistical Analysis and Global Mapping of CH4 Columns from GOSAT Observations

Luman Li et al.

Summary: Methane is an important greenhouse gas contributing to global warming, and a study has developed a mapping dataset using GOSAT observations to understand the spatiotemporal variations of methane concentrations. The dataset provides insights into the characteristics and driving factors of methane variation and detects a reduction in methane during the COVID-19 lockdown in China.

REMOTE SENSING (2022)

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Article Environmental Sciences

Long-Term Trends and Spatiotemporal Variations in Atmospheric XCH4 over China Utilizing Satellite Observations

Jianhui Xu et al.

Summary: This study verified the accuracy of methane concentration data in China and investigated its long-term trends and spatial variations. The results showed that methane concentration has been increasing over the past 17 years, with noticeable seasonal variations and significant influences from human activities.

ATMOSPHERE (2022)

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Article Energy & Fuels

High-Pressure Sorption of Methane, Ethane, and Their Mixtures on Shales from Sichuan Basin, China

Liang Huang et al.

Summary: High-pressure sorption isotherms were measured on shales from Sichuan Basin, China for CH4, C2H6, and their mixtures using a volumetric method. The temperature had a more notable effect on the binary excess sorption isotherms compared to gas composition. C2H6 showed stronger affinity than CH4, with its effect more significant at high pressures and less significant at low pressures.

ENERGY & FUELS (2021)

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Article Multidisciplinary Sciences

Diurnal and seasonal variability of CO2 and CH4 concentration in a semi-urban environment of western India

Abirlal Metya et al.

Summary: This study conducted measurements of CO2 and CH4 concentrations in the Western Ghats of India, revealing significant seasonal variations and strong influences of monsoon circulation on greenhouse gas dynamics in this region.

SCIENTIFIC REPORTS (2021)

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Review Environmental Sciences

Greenhouse gas emission from rice fields: a review from Indian context

Khushboo Gupta et al.

Summary: Agricultural soil, especially rice paddies, play a significant role in emitting greenhouse gases such as methane and nitrous oxide. Understanding the mechanisms and factors influencing the production and release of these gases is crucial in developing strategies to reduce emissions and mitigate global climate change impacts.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2021)

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Article Environmental Sciences

GOSAT CH4 Vertical Profiles over the Indian Subcontinent: Effect of a Priori and Averaging Kernels for Climate Applications

Dmitry A. Belikov et al.

Summary: The study investigated methane variability over India and surrounding oceans using thermal infrared band observations. It found distinct seasonal variations in methane concentrations, with significant influence from local emissions and global monsoon circulations. The research highlights the importance of improving upper troposphere and lower stratosphere profile shapes for better understanding methane cycling in the Earth's environment.

REMOTE SENSING (2021)

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Article Environmental Sciences

Detecting the Responses of CO2 Column Abundances to Anthropogenic Emissions from Satellite Observations of GOSAT and OCO-2

Mengya Sheng et al.

Summary: This study investigated the impact of global CO2 emissions on climate change using satellite data, showing an increase in XCO2 related to anthropogenic emissions and seasonal burning. The research found that XCO2 anomalies increase significantly in winter and are associated with regional CO2 emissions.

REMOTE SENSING (2021)

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Article Meteorology & Atmospheric Sciences

Validation of methane and carbon monoxide from Sentinel-5 Precursor using TCCON and NDACC-IRWG stations

Mahesh Kumar Sha et al.

Summary: The study demonstrates the high quality of S5P methane (CH4) and carbon monoxide (CO) data by validating the products against global Total Carbon Column Observing Network (TCCON) and Infrared Working Group of the Network for the Detection of Atmospheric Composition Change (NDACC-IRWG) stations. The results show that the S5P data meet mission requirements and exhibit a seasonal dependence, with some exceptions due to co-location mismatches and data availability.

ATMOSPHERIC MEASUREMENT TECHNIQUES (2021)

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Article Geosciences, Multidisciplinary

A comparative study of anthropogenic CH4 emissions over China based on the ensembles of bottom-up inventories

Xiaohui Lin et al.

Summary: Atmospheric methane is strongly influenced by human activities, with China contributing significantly to global anthropogenic emissions. Emissions from China varied widely among inventories, with the energy sector being the largest contributor. Emissions stabilized in the 1990s but increased significantly afterwards, and then became relatively stable from 2015 to 2019. Differences in emissions hotspot identification and incomplete information pose challenges to mitigation efforts for methane emission reductions.

EARTH SYSTEM SCIENCE DATA (2021)

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Article Soil Science

Methane and nitrous oxide emissions from a ratoon paddy field in Sichuan Province, China

Kaifu Song et al.

Summary: The CH4 and N2O emission peaks of ratoon rice were earlier than those of single rice, with significantly higher emissions and increased yield and GWP. However, there was no significant difference in yield-scaled GWP between ratoon rice and single rice.

EUROPEAN JOURNAL OF SOIL SCIENCE (2021)

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Article Environmental Sciences