최근 10년 한반도 안면도와 전 지구 이산화탄소 증가율 비교 분석 (Analysis of Carbon Dioxide Growth Rate Observed at Anmyeon-do, Korea, and Globally over the Last Decade)

서지정보

· 발행기관 : 한국대기환경학회
· 수록지 정보 : 한국대기환경학회지 / 40권 / 6호 / 601 ~ 613페이지
· 저자명 : 이선란, 신대근, 주상원, 서원익, 김수민

초록

Variability in the annual growth rate of carbon dioxide (CO2) on both global and regional scales is associated with changes in terrestrial carbon sinks. This study presents a comparative analysis of the year-to-year variability in CO2 growth rates over the last decade from 2013 to 2023 in the Anmyeon-do (AMY: 36.53°N, 126.32°E, South Korea) regional background station and globally recent decade. We fist investigated the influence of the El Niño-Southern Oscillation (ENSO) on CO2 growth rates. During the strong El Niño event of 2015/2016, both the AMY and global CO2 growth rates increased by over 10% compared to the last decade average. Conversely, the subsequent La Niña event of 2021/2022 led to a decline of more than 10% in both AMY and global CO2 growth rates, indicating a similar response of CO2 growth rates at AMY to ENSO impact as observed globally. The study also focused on the years 2017 and 2019, which exhibited significant year-to-year variability in CO2 growth rates at AMY relative to the global. In 2017, the global annual CO2 growth rate aligned with the last decade average, whereas the AMY experienced a 40% reduction, representing a notably larger decrease. Conversely, in 2019, while the global CO2 growth rate remained consistent with last decade average, AMY recorded a 22% increase. To explore this pronounced year to year variability, we analyzed the optimized terrestrial Net Ecosystem Exchange (NEE) of CO2 from the NOAA CarbonTracker model. In 2017, the biosphere CO2 uptake around the Korean Peninsula was 0.27 PgC, the highest in the last decade, while in 2019, it dropped to 0.14 PgC, approximately half of the 2017 level. These findings suggest that the CO2 growth rates observed in AMY are highly sensitive to terrestrial changes due to temperature and drought conditions around the Korean Peninsula, highlighting the imperative for long-term monitoring to understand the impact of regional climatic characteristics on the carbon cycle amid ongoing climate change.

영어초록

Variability in the annual growth rate of carbon dioxide (CO2) on both global and regional scales is associated with changes in terrestrial carbon sinks. This study presents a comparative analysis of the year-to-year variability in CO2 growth rates over the last decade from 2013 to 2023 in the Anmyeon-do (AMY: 36.53°N, 126.32°E, South Korea) regional background station and globally recent decade. We fist investigated the influence of the El Niño-Southern Oscillation (ENSO) on CO2 growth rates. During the strong El Niño event of 2015/2016, both the AMY and global CO2 growth rates increased by over 10% compared to the last decade average. Conversely, the subsequent La Niña event of 2021/2022 led to a decline of more than 10% in both AMY and global CO2 growth rates, indicating a similar response of CO2 growth rates at AMY to ENSO impact as observed globally. The study also focused on the years 2017 and 2019, which exhibited significant year-to-year variability in CO2 growth rates at AMY relative to the global. In 2017, the global annual CO2 growth rate aligned with the last decade average, whereas the AMY experienced a 40% reduction, representing a notably larger decrease. Conversely, in 2019, while the global CO2 growth rate remained consistent with last decade average, AMY recorded a 22% increase. To explore this pronounced year to year variability, we analyzed the optimized terrestrial Net Ecosystem Exchange (NEE) of CO2 from the NOAA CarbonTracker model. In 2017, the biosphere CO2 uptake around the Korean Peninsula was 0.27 PgC, the highest in the last decade, while in 2019, it dropped to 0.14 PgC, approximately half of the 2017 level. These findings suggest that the CO2 growth rates observed in AMY are highly sensitive to terrestrial changes due to temperature and drought conditions around the Korean Peninsula, highlighting the imperative for long-term monitoring to understand the impact of regional climatic characteristics on the carbon cycle amid ongoing climate change.

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