Greenhouse Gas Emissions in the Arctic … A Vicious Circle of Warming

. The researchers report that as temperatures rise due to global warming and the decomposition of plants in Arctic soils releases more and more greenhouse gases, the researchers say.

An international team of researchers led by NASA, NOAA, the University of Zurich and the University of Notre Dame, led by Professor Jeong Jeong-jong of the Higher School of Science and Technology. The results show that the residence time of carbon is reduced by 13.4% in Science Advances.

The team looked at the impact of warming on the carbon cycle in the Arctic. NOAA used carbon dioxide concentrations measured in Barrow, Alaska , in 1974-2015, measured in increments of 30 minutes.
We also badyzed satellite observations, ground temperature and atmospheric observations, as well as various observations and models of terrestrial ecosystems.

The researchers compared the period 1974-1983 to the period 2006-2015 and found that carbon dioxide emissions increased from September to October when temperatures began to fall more recently than in the past.
The difference between the maximum concentration and the lowest concentration of CO2 per year increases and the amplitude is increased by 0.04 ppm per year.

Variation of carbon dioxide in the Arctic. In recent years (2006 ~ 2015), we can see that the deviation in September and October has increased. [자료 정수종 교수]

Regional variation of carbon dioxide in Alaska between maximum and minimum annual concentrations. It can be seen that the gap is increasing with the increase in recent years. This means that emissions will continue to increase over time. [자료 정수종 교수]

While the permafrost of Alaska melts, some trees may not rise properly and show a little scream. Kang, Chan-Soo

This means that organic matter (plant) in the soil is decomposed more than the past by respiration.

Comparing the two periods from 1979 to 1988 and from 2004 to 2013, the residence time of carbon in the soil also decreased by 13.4%.

"The reduction in carbon sequestration time in the soil means that the Alaska tundra region is becoming increasingly localized," said the researcher. The report said:

Microbial respiration that releases carbon by decomposing plant organic matter is less sensitive to high temperatures as plants absorb photosynthesis by photosynthesis, which means that soil carbon in the soil. Arctic will be reduced in the 21st century

"Reducing carbon retention time due to warming means more and more carbon will escape in the future," he said. "In the future, carbon emissions will increase in polar flat soils, more severe climate change," he said.

Graduate School of Environmental Studies of the Seoul National University Professor Jeong Jeong

Kang Chan-soo Environmental Specialist Reporter [email protected]