2019 개선된 IPCC 가이드라인에 따른 농업분야 재배(경종)부문의 배출량 산정방법 개선연구

Abstract

Accurate estimation of national greenhouse gas (GHG) emissions is very important for mitigation action of climate change. The IPCC (Intergovernmental Panel on Climate Change) guidelines have been used for calculating emissions from the energy, industrial processes, agriculture, and LULUCF (Land Use, Land-Use Change and Forestry), and waste sectors in national country. Assessment of national GHG emissions from the agriculture sector has been conducted using the 2000 Good Practice Guidance and 2006 IPCC Guidelines. In 2019, refined guidelines, such as the 2019 Refinement to the 2006 IPCC Guidelines were published. We conducted to this study to investigate application of the new guidelines which including calculation equation, emission factor, fractions and so on to compare of the old one.<BR> Some emission factors and fractions were changed to disaggregated ones considering climate zone and fertilizer type. Also, the default cultivation period of rice was provided for the fist time in the guideline and that was 112 days in the East Asia region. The nitrous oxide emission factor for flooded rice fields was changed from 0.003 to 0.005 kg N₂O-N (kg N)<SUP>-1</SUP> when applied to single and multiple drainage of rice paddies. In addition to fraction of N loss through leaching and runoff, fraction of synthetic fertilizer N and organic N fertilizer that volatilize as NH₃ and NO<SUB>x</SUB> were changed. When the changed parameters including emission factors, were applied to estimation of national GHG inventory of the agricultural sector, total emissions were reduced by 1,132 Gg CO₂-eq.