Methane and Nitrous Oxide Emissions from Livestock Agriculture in 16 Local Administrative Districts of Korea

This study was conducted to evaluate methane (CH(4)) and nitrous oxide (N(2)O) emissions from livestock agriculture in 16 local administrative districts of Korea from 1990 to 2030. National Inventory Report used 3 yr averaged livestock population but this study used 1 yr livestock population to find yearly emission fluctuations. Extrapolation of the livestock population from 1990 to 2009 was used to forecast future livestock population from 2010 to 2030. Past (yr 1990 to 2009) and forecasted (yr 2010 to 2030) averaged enteric CH(4) emissions and CH(4) and N(2)O emissions from manure treatment were estimated. In the section of enteric fermentation, forecasted average CH(4) emissions from 16 local administrative districts were estimated to increase by 4%–114% compared to that of the past except for Daejeon (−63%), Seoul (−36%) and Gyeonggi (−7%). As for manure treatment, forecasted average CH(4) emissions from the 16 local administrative districts were estimated to increase by 3%–124% compared to past average except for Daejeon (−77%), Busan (−60%), Gwangju (−48%) and Seoul (−8%). For manure treatment, forecasted average N(2)O emissions from the 16 local administrative districts were estimated to increase by 10%–153% compared to past average CH(4) emissions except for Daejeon (−60%), Seoul (−4.0%), and Gwangju (−0.2%). With the carbon dioxide equivalent emissions (CO(2)-Eq), forecasted average CO(2)-Eq from the 16 local administrative districts were estimated to increase by 31%–120% compared to past average CH(4) emissions except Daejeon (−65%), Seoul (−24%), Busan (−18%), Gwangju (−8%) and Gyeonggi (−1%). The decreased CO(2)-Eq from 5 local administrative districts was only 34 kt, which was insignificantly small compared to increase of 2,809 kt from other 11 local administrative districts. Annual growth rates of enteric CH(4) emissions, CH(4) and N(2)O emissions from manure management in Korea from 1990 to 2009 were 1.7%, 2.6%, and 3.2%, respectively. The annual growth rate of total CO(2)-Eq was 2.2%. Efforts by the local administrative offices to improve the accuracy of activity data are essential to improve GHG inventories. Direct measurements of GHG emissions from enteric fermentation and manure treatment systems will further enhance the accuracy of the GHG data. (Key Words: Greenhouse Gas, Methane, Nitrous Oxide, Carbon Dioxide Equivalent Emission, Climate Change)