气候变化领域集成服务门户(CCPortal): Evaluating Cropland N2O Emissions and Fertilizer Plant Greenhouse Gas Emissions With Airborne Observations

CCPortal

DOI	10.1029/2020JD032815
	Evaluating Cropland N2O Emissions and Fertilizer Plant Greenhouse Gas Emissions With Airborne Observations
	Gvakharia A.; Kort E.A.; Smith M.L.; Conley S.
发表日期	2020
ISSN	2169897X
卷号	125 期号:16
英文摘要	Agricultural activity is a significant source of greenhouse gas emissions. The fertilizer production process emits N2O, CO2, and CH4, and fertilized croplands emit N2O. We present continuous airborne observations of these trace gases in the Lower Mississippi River Basin to quantify emissions from both fertilizer plants and croplands during the early growing season. Observed hourly emission rates from two fertilizer plants are compared with reported inventory values, showing agreement for N2O and CO2 emissions but large underestimation in reported CH4 emissions by up to a factor of 100. These CH4 emissions are consistent with loss rates of 0.6–1.2%. We quantify regional emission fluxes (100 km) of N2O using the airborne mass balance technique, a first application for N2O, and explore linkages to controlling processes. Finally, we demonstrate the ability to use airborne measurements to distinguish N2O emission differences between neighboring fields, determining we can distinguish different emission behaviors of regions on the order of 2.5 km2 with emissions differences of approximately 0.026 μmol m−2 s−1. This suggests airborne approaches such as outlined here could be used to evaluate the impact of different agricultural practices at critical field-size spatial scales. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	airborne observations; fertilizer; flux inversion; greenhouse gas emissions; mass balance; nitrous oxide
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185844
作者单位	Climate and Space Science and Engineering, University of Michigan, Ann Arbor, MI, United States; Scientific Aviation Inc., Boulder, CO, United States
推荐引用方式 GB/T 7714	Gvakharia A.,Kort E.A.,Smith M.L.,et al. Evaluating Cropland N2O Emissions and Fertilizer Plant Greenhouse Gas Emissions With Airborne Observations[J],2020,125(16).
APA	Gvakharia A.,Kort E.A.,Smith M.L.,&Conley S..(2020).Evaluating Cropland N2O Emissions and Fertilizer Plant Greenhouse Gas Emissions With Airborne Observations.Journal of Geophysical Research: Atmospheres,125(16).
MLA	Gvakharia A.,et al."Evaluating Cropland N2O Emissions and Fertilizer Plant Greenhouse Gas Emissions With Airborne Observations".Journal of Geophysical Research: Atmospheres 125.16(2020).