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Tonga’s eruption doubles the concentration of carbon dioxide in the air

GMI in space helps assess greenhouse gases around Tonga before and after the eruption. Credit: Ye Hanhan

The massive underwater volcanic eruption in Tonga has led to a heated debate about how it affects the Earth’s climate.


The research team led by Professor Xiong Wei of the Hefei Institute of Materials Science, Chinese Academy of Sciences (CAS) Greenhouse gas concentration Before and after volcanic eruption Uses greenhouse gas monitoring equipment (GMI) in Tonga.

They are Greenhouse gas Monitoring data for Australia and New Zealand near the volcano in January 2019, January 2020 and January 2022.

After the eruption of Tonga volcano in January 2022 carbon dioxide (CO2According to researchers, concentrations near the volcano soared to about 414 parts per million (ppm). An increase of 2 ppm is equivalent to annual CO, compared to the estimated 412 ppm if the volcano did not erupt.2 Release on earth.

“Large amount of CO2 “It was released into the atmosphere during the eruption,” said one of the researchers, Ye Han-han, “accumulation is caused by gas overflow and eruption.”

Yearly fluctuations in atmospheric CO2 Concentration on land Southern hemisphere Before the eruption, it is increasing at a relatively stable rate. Yearly fluctuation of CO2 It was about 2ppm every year.

Before the eruption, the CO in the atmosphere fluctuates year by year.2 Land concentration in the Southern Hemisphere was increasing at a relatively stable rate. Annual fluctuation of CO2 It was about 2ppm a year.

GMI was installed on hyperspectral observation satellites (GF-5B) and Gaofen-5 satellites (GF-5) to monitor the global distribution of greenhouse gases (such as CO).2 And CHFour) From space.

In the future, GMI will enhance atmospheric CO monitoring2 It is generated by volcanic activity and further assesses its impact on the Earth’s ecological environment and climate change.


Observation equipment captures the gas produced by the Tonga eruption


Quote: The eruption of Tonga doubles the concentration of carbon dioxide in the air (February 18, 2022). Obtained from February 18, 2022 https://phys.org/news/2022-02-tonga-eruption-carbon-dioxide-air.html

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Tonga’s eruption doubles the concentration of carbon dioxide in the air

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