이전|다음

TROPOMI NO2 기반 화석 에너지 CO2 일일 배출량 간접 추정

  • role： First author第一作者
  • Affiliation：

    School of Environment Science and Spatial Informatics,China University of Mining and Technology, Xuzhou 221116, China

  • Email：lulingxiao@cumt.edu.cn
  • Introduction：陆凌霄，研究方向为大气环境遥感。E-mail：lulingxiao@cumt.edu.cn
LU Lingxiao1,  
  • role： Corresponding author通信作者
  • Affiliation：

    School of Environment Science and Spatial Informatics,China University of Mining and Technology, Xuzhou 221116, China

  • Email：qinkai@cumt.edu.cn
  • Introduction：秦凯，研究方向为大气环境遥感。E-mail：qinkai@cumt.edu.cn
QIN Kai1*,  
  • Affiliation：

    School of Environment Science and Spatial Informatics,China University of Mining and Technology, Xuzhou 221116, China

COHEN Jason Blake1,  
  • Affiliation：

    School of Environment Science and Spatial Informatics,China University of Mining and Technology, Xuzhou 221116, China

LI Xiaolu1,  
  • Affiliation：

    Satellite Application Center for Ecology and Environment, Beijing 100094, China

ZHOU Chunyan2

추상적인

‘탄소중립’ 목표를 달성하기 위해 위성 원격탐사 기술을 활용하여 화석 에너지 소비로 인한 이산화탄소(CO2) 배출량을 추정하는 것은 매우 중요하다. 그러나 CO2가 대기 중에 오랜 시간 머무르고 기존 CO2 위성 센서들의 공간적 커버리지가 제한적이기 때문에 위성 관측으로부터 역산된 CO2 기둥 농도 데이터를 직접 사용하여 배출량을 추정하는 것은 어려운 점이 많다. 화석 에너지 소비는 CO2와 질소산화물(NOxx)을 동시에 배출하며, NOxx는 수명이 짧고 위성 원격탐사를 통해 배출량을 추정하는 것이 비교적 용이하다. 본 연구는 28개의 동부 도시와 1개의 서부 에너지 골든 트라이앵글 지역을 연구 대상으로 선정하여 TROPOMI NO2 기둥 농도를 기반으로 화석 에너지 CO2 일일 배출량을 간접 추정하는 연구를 수행하였다. 우선, 본 연구는 2019년 TROPOMI NO2 대류권 기둥 농도 데이터 제품과 질량 보존 모델을 사용하여 NOxx 일일 배출량과 불확실성을 추정하였다. 다음으로, 다중 규모 배출 목록 모델(MEIC)에서 CO2와 NOxx 배출량의 관계를 분석하였다. 마지막으로 화석 에너지 소비로 인한 CO2 일일 배출량을 추정하였다. 결과는 추정치가 MEIC 목록 내 CO2 배출 공간 분포와 일치하지만, 더 높은 공간 해상도와 시간 빈도로 인해 통계 자료 부족으로 인한 신흥 및 소규모 배출원을 밝혀낼 수 있음을 보여준다. 동부 도시인 베이징을 예로 들면, 시 중심 주변 교외 지역의 원격탐사 추정치는 MEIC 목록보다 약 104% 높아 동부 도시의 급속한 확장과 함께 많은 신흥 배출원이 나타나고 있음을 시사한다. 서부 에너지 골든 트라이앵글 지역인 위린을 예로 들면, 해당 지역 발전소, 제철소 및 탄광 지역에서 일부 배출원은 MEIC 목록 내 전체 배출량의 10%에 불과하지만 추정 결과에서는 이 비율이 37%로, 목록에 포함되지 않은 소규모 발전소와 산업원이 위성 원격탐사를 통해 포착될 수 있음을 나타낸다. 본 연구 결과는 중국의 화석 에너지 탄소 배출량 산정을 위한 기술적 지원을 제공할 수 있다.

키워드

원격탐사;화석 에너지;질소산화물;이산화탄소;TROPOMI;배출 목록;간접 추정;질량 보존;신흥 배출원

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