Characteristics of greenhouse gas emissions from rice paddy fields in South Korea under climate change scenario RCP-8.5 using the DNDC model

作     者：Wonjae HWANG Chanyang KIM Kijong CHO Seunghun HYUN Wonjae HWANG;Chanyang KIM;Kijong CHO;Seunghun HYUN

作者机构：Department of Environmental Science and Ecological EngineeringKorea UniversitySeoul 02841(South Korea) 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2021年第31卷第2期

页      面：332-341页

核心收录：

学科分类：07[理学] 0818[工学-地质资源与地质工程] 070602[理学-大气物理学与大气环境] 0903[农学-农业资源与环境] 0706[理学-大气科学] 0901[农学-作物学] 0713[理学-生态学] 

基　　金：funded in part by the Korea Ministry of Environment(MOE)via the Climate Change Correspondence Program(No.2014-001310008) in part by Korea University Grant 

主　　题：CH_(4) CO_(2) model performance paddy soil rising temperature tillage depth 

摘      要：Understanding the greenhouse gas(GHG)emission from rice paddy fields is essential to come up with appropriate countermeasure in response to global ***,GHG emissions from paddy fields in South Korea are not well *** objectives of this study were to estimate the carbon dioxide(CO_(2))and methane(CH_(4))emissions from rice paddy fields in South Korea,under the Representative Concentration Pathway 8.5(RCP-8.5)climate change scenario using the DNDC(i.e.,DeNitrification-DeComposition)model at 1-km^(2)*** performance of the model was verified with field data collected using a closed chamber,which supports the application of the model to South *** the model predictions and field measurements showed that most(95%)GHG emissions occur in the cropping period,between April and *** a baseline(assuming no climate change),the national sums of the CO_(2)and CH_(4)emissions for the 2020 s and 2090 s were estimated to be 5.8×10^(6)and 6.0×10^(6)t CO_(2)-equivalents(CO_(2)-eq)year^(-1)for CO_(2)and 6.4×10^(6)and 6.6×10^(6)t CO_(2)-eq year^(-1)for CH_(4),respectively,indicating no significant changes over 80 *** RCP-8.5,in the 2090 s,CH_(4)emissions were predicted to increase by 10.7×10^(6)and 14.9×10^(6)t CO_(2)-eq year^(-1),for a 10-or 30-cm tillage depth,***,the CO_(2)emissions gradually decreased with rising temperatures,due to reduced root *** tillage increased the emissions of both GHGs,with a more pronounced effect for CH_(4)than CO_(2).Intermittent drainage in the middle of the cropping season can attenuate the CH_(4)emissions from paddy *** findings of this work will aid in developing nationwide policies on agricultural land management in the face of climate change.