초록 ▼

•안면도 NDIR 분석기와 CRDS 분석기간의 자료의 비교 분석 및 제주도 고산 경북대 관측소 LOFLO CO₂(이산화탄소) 분석시스템과의 상호 비교 분석을 통한 안면도 이산화탄소 연속 관측 측정 체계의 정확성 및 안정성을 검증하였음.
•안면도 CO₂ 관측 자료로부터 CSEOF 통계분석 기법을 이용한 배경농도의 분리 산정 기법을 개발하고, 제주도 고산(경북대 관측소)의 CO₂ 관측 자료와의 통합 분석을 통해 배경농도산정 기법의 정확성을 강화하였음.
•안면도 CO<

•안면도 NDIR 분석기와 CRDS 분석기간의 자료의 비교 분석 및 제주도 고산 경북대 관측소 LOFLO CO₂(이산화탄소) 분석시스템과의 상호 비교 분석을 통한 안면도 이산화탄소 연속 관측 측정 체계의 정확성 및 안정성을 검증하였음.
•안면도 CO₂ 관측 자료로부터 CSEOF 통계분석 기법을 이용한 배경농도의 분리 산정 기법을 개발하고, 제주도 고산(경북대 관측소)의 CO₂ 관측 자료와의 통합 분석을 통해 배경농도산정 기법의 정확성을 강화하였음.
•안면도 CO₂관측 자료가 보이는 인위적․자연적 변동성을 산출하여, 국지적․지역적 오염원의 영향을 분리 이해하고, 궁극적으로 자료의 손실률을 최소화하였음.
•CSEOF 통계분석 기법을 기반으로 도출된 동북아시아 CO₂의 자연적 변동성 추적 및 인위적배출원 규명 및 정량화의 기반을 마련함
•고산관측소의 ²²²Rn(라돈) 배경농도 관측 자료를 확보하고, ²²²Rn을 수송추적자로온실기체(CO₂등) 분포와의 상관성을 검토하며, 장거리수송 화학 추적자로의 활용을 모색함.

Abstract ▼

1. Purpose
Atmospheric CO₂ concentrations which are observed at many background monitoring stations these days often reflect significant influence of anthropogenic emissions occurring on local and/or regional scales. Determining the underlying baseline or background concentration from

1. Purpose
Atmospheric CO₂ concentrations which are observed at many background monitoring stations these days often reflect significant influence of anthropogenic emissions occurring on local and/or regional scales. Determining the underlying baseline or background concentration from non-baseline data can be a difficult task, but is essential to understanding the variations and trends in atmospheric CO₂ and investigating the quantitative contribution of local/regional emissions. The objective of this project is to develop a new statistical method useful for identifying baseline signals not only from the global monitoring stations but also from regional stations where lots of local and/or regional influences act on the background natural variations of CO₂ concentrations. This is a critical step towards the qualification of regional source strength of CO₂ emissions. Without the ability to determine the CO₂ sources on regional and/or country scales, precise prediction of future atmospheric carbon levels and effective emission regulation strategy would be impossible.
2. Contents
•This proposed work consists of the following measurement and analysis tasks
•Verify continuity of the hourly CO₂ observation data obtained at the Korea GAW station located in Anmyeon-do from mid-2011 to mid-2012 when the previous NDIR-based sensor that had been used for the CO₂ monitoring in the Anmyeon-do station were replaced by a new CRDS instrument with an overlapping period of 6 months.
•Evaluate the CO₂ records from the Anmyeon-do station to see how well they represent regional characteristics of the CO₂ time variations and the source distributions in the East Asia, in comparison with both in-situ observations using a LOFLO system and weekly flask measurements at a remote station, Gosan in JejuIsland.
•Confirm analytical consistency for the inter-station and/or inter-instrument comparison between the Anmyeon-do and Gosan systems by sharing a same surveillance standard.
•Calculate the back trajectories derived for Anmyeon-do using a Lagrangian partical dispersion model, FLEXPART to examine atmospheric transport pathway of an air mass constraining the chemical properties(e.g., temporal variations in the atmospheric CO₂ concentration) of the air mass.
•Establish weekly, 1-L canister air sampling system to determine the atmospheric d¹³C-CO₂ using a cavity ring down spectroscopy(CRDS) carbon isotope analyzer.These observations are the first d¹³C data of ambient CO₂ at Anmyeon-do.
•Develope a new statistical method based on the Cyclostationary Empirical Orthogonal Function(CSEOF) for determining baseline concentrations from the CO₂ time series data measured at the Anmyeon-do station.
•Study discrepancies and agreements of the new baseline method proposed in this work in comparison with the conventional WMO fitting method and the AGAGE statistics.
•Apply the new method to the CO₂ time series obtained at one-hour interval from 2008 to 2012 at Gosan to confirm that basically identical regional baseline information is extracted out of the two different data sets characterized by different influences of polluted emissions and thus that it is consistently applicable to different stations without using a differently pre-defined set of data selection and filtering criteria.
•Reconstruct CO₂ values of the data missing periods by characterizing the time-variant modulations in diurnal and seasonal cycles and long-term trend of CO₂ baseline signals identified by the new baseline method.
•Quantify hourly contributions of local and/or regional emissions to the observed CO₂ concentrations and further analyze their potential source regions by suing trajectory statistics.
•Measure continuous atmospheric ²²²Rn concentrations at the Jeju Gosan station and define baseline concentrations data.
•Investigate the feasibility of ²²²Rn as a transport tracer to identify source regions affecting green house gases observed at the Jeju Gosan station.
3. Expected Contribution
•To provide scientific basis for understanding natural variations of atmospheric CO₂ concentrations and to predict the increasing trends of CO₂ concentrations in the East Asia
•To build basic data for investigation of anthropogenic CO₂ emission sources and its quantitative contribution to the natural variations and trends.
•To constrain and improve chemical transport models and emission models with well-defined background concentrations and anthropogenic emission estimates on regional and/or country scales.
•Direct to make establishing an effective emission regulation strategy possible and to provide essential information of country-based emissions for international treat and negotiation.

목차 Contents

• 표지 ... 1
• 제출문 ... 2
• 보고서 요약서 ... 3
• 요약문 ... 4
• SUMMARY ... 11
• CONTENTS ... 13
• 목차 ... 14
• 제1장 연구개발과제의 개요 ... 15
• 제1절 연구개발 목표 ... 15
• 제2절 연구개발 필요성 ... 15
• 제2장 국내외 기술 개발 현황 ... 19
• 제1절 연구개발대상 기술의 국내·외 현황 ... 19
• 제3장 연구개발 수행 내용 및 결과 ... 23
• 제1절 연구개발 내용 및 연구범위 ... 23
• 제2절 연구개발 수행 결과 ... 28
• 제3절 연구개발 성과 ... 54
• 제4장 목표 달성도 및 관련분야에의 기여도 ... 60
• 제1절 연구목표 달성도 ... 60
• 제2절 관련분야 기여도 ... 62
• 제5장 연구개발결과의 활용계획 ... 63
• 제1절 연구개발 결과의 활용계획 ... 63
• 제6장 연구개발과정에서 수집한 해외과학기술정보 ... 64
• 제1절 국내외 관련분야 해외과학기술정보 ... 64
• 제7장 연구시설·장비 현황 ... 65
• ●제1절 도입 연구장비 목록 ... 65
• ●제2절 도입 연구장비 내역 ... 65
• ●제3절 국가연구시설장비정보 등록 ... 66
• 제8장 참고문헌 ... 67
• 부록 I. FLEXPART User Manual ... 68
• 부록 II. 역궤적 모델의 통계분석 방법 매뉴얼 ... 78
• 부록 III. CSEOF 기반의 안면도 이산화탄소 배경대기 농도 산정프로그램 매뉴얼 ... 86
• 끝페이지 ... 97