A Revised Estimate of N₂O Emission Factor for Spring Chinese cabbage fields in Korea

Abstract

Greenhouse-gas emission factors are widely used to estimate emissions arising from a defined unit of a specific activity. Such estimates are used both for international reporting to the United Nations Framework Convention on Climate Change (UNFCCC) and for a myriad of national and subnational reporting purposes. The Intergovernmental Panel on Climate Change (IPCC) provides a methodology for national and sub-national estimation of known greenhouse gas emissions including N 2 O for each sector from which the emissions arise. The objective of this study was to develop an emission factor to estimate the direct N 2 O emission from an agricultural field cultivated with Chinese cabbage during spring season in 2010-2012. An estimated emission factor of N 2 O calculated over three years from field experiment accounting for cumulative N 2 O emission, nitrogen fertilization rate, and background N 2 O emission was 0.0056±0.00254 (95% CI) Kg N 2 O-N/kg N. More extensive studies are needed to develop N 2 O emission factors for other upland crops in various regions of Korea because N 2 O emission is influenced by many factors including climate characteristics, soil properties agricultural practices and crop species.

Analysis of Research Trends in Nitrous Oxide Emissions from Upland in Korea

“…N2O emission reduction technology 15 (28.3%) Kim et al, 2011b;Seo et al, 2012;Kim et al, 2014a;Kim, 2014c;Park et al, 2014b;Park et al, 2015;Yoo et al, 2015;Kang et al, 2016;Park et al, 2016b;Yoo et al, 2016;Lee et al, 2017a;Lee, 2017b;Ju et al, 2018;Lee et al, 2018b;Kim et al, 2018a N2O emission characteristics 13 (24.5%) Kim, 2009;Kim et al, 2010a;Kim et al, 2010b;Kim and Na, 2011a;Na, 2012;Yang et al, 2012a;Yang et al, 2012b;Yang et al, 2012c;Park et al, 2014a;Jennifer et al, 2015;Cheol et al, 2016;Kim et al, 2017b;Lee et al, 2018a Development of N2O emission factor 12 (22.6%) Kim et al, 2014b;Lee, 2014a;Lee et al, 2014b;Kim et al, 2015b;Kim et al, 2015a;Kim et al, 2016;Alam, 2017;Kim et al, 2017a;Hyun et al, 2017;Kim et al, 2018b;Alam, 2019;Kim et al, 2019 N2O inventory assessment 11 (20.8%) Kim et al, 2011c;Jeong et al, 2011a;Jeong et al, 2011b;Jeong et al, 2012;…”

Measurement Uncertainty of Nitrous Oxide Concentrations from a Upland Soil Measured by an Automated Open Closed Chamber Method

“…전 세계적으로 질소수지 연구에서 질소 비료가 중요한 역 할을 하며, 아산화질소가 지구 온난화에 미치는 영향이 이산 화탄소 보다 310배 높기 때문에 농경지 토양 유래 아산화질 소 배출량 산정에 관한 많은 선행연구가 있었다 [14][15][16][17][18][19][20][21]. 국내 에서는 정확한 온실가스 배출량 산정과 신뢰도를 높이기 위 해 아산화질소 국가 고유 배출계수 7종을 개발한 바 있고 [22][23][24][25], 가축분 퇴비, 질소시비 수준, 토양환경, 무경운, 녹비 재배 등을 통한 저감기술 개발을 위한 선행연구들이 있었다 [26][27][28][29][30][31][32][33]. 아산화질소 배출량 직접측정 선행연구의 95% 이상 이 챔버법을 사용하였으며, 챔버법은 배출표면을 덮은 챔버로 부터 해당기체의 짧은 시간 동안의 농도변화를 측정하는 닫 힌 챔버법을 주로 사용하였다 [26]…”