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DOI	10.5194/acp-22-8241-2022
	Assessing the representativity of NH3 measurements influenced by boundary-layer dynamics and the turbulent dispersion of a nearby emission source
	Schulte, Ruben B.; van Zanten, Margreet C.; van Stratum, Bart J. H.; de Arellano, Jordi Vila-Guerau
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	8241
结束页码	8257
卷号	22 期号:12 页码:17
英文摘要	This study presents a fine-scale simulation approach to assess the representativity of ammonia (NH3) measurements in the proximity of an emission source. Close proximity to emission sources (< 5km) can introduce a bias in regionally representative measurements of the NH3 molar fraction and flux. Measurement sites should, therefore, be located a significant distance away from emission sources, but these requirements are poorly defined and can be difficult to meet in densely agricultural regions. This study presents a consistent criterion to assess the regional representativity of NH3 measurements in proximity to an emission source, calculating variables that quantify the NH3 plume dispersion using a series of numerical experiments at a fine resolution (20 m). Our fine-scale simulation framework with explicitly resolved turbulence enables us to distinguish between the background NH3 and the emission plume, including realistic representations of NH3 deposition and chemical gas-aerosol transformations. We introduce the concept of blending distance based on the calculation of turbulent fluctuations to systematically analyze the impact of the emission plume on simulated measurements, relative to this background NH3. We perform a suite of systematic numerical experiments for flat homogeneous grasslands, centered around the CESAR Observatory at Cabauw, to analyze the sensitivity of the blending distance, varying meteorological factors, emission/deposition and NH3 dependences. Considering these sensitivities, we find that NH3 measurements at this measurement site should be located at a minimum distance of 0.5-3.0 and 0.75-4.5 km from an emission source for NH3 molar fraction and flux measurements, respectively. The simulation framework presented here can easily be adapted to local conditions, and paves the way for future ammonia research to integrate simulations at high spatio-temporal resolutions with observations of NH3 concentrations and fluxes.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000816577700001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273734
作者单位	Wageningen University & Research; Netherlands National Institute for Public Health & the Environment
推荐引用方式 GB/T 7714	Schulte, Ruben B.,van Zanten, Margreet C.,van Stratum, Bart J. H.,et al. Assessing the representativity of NH3 measurements influenced by boundary-layer dynamics and the turbulent dispersion of a nearby emission source[J],2022,22(12):17.
APA	Schulte, Ruben B.,van Zanten, Margreet C.,van Stratum, Bart J. H.,&de Arellano, Jordi Vila-Guerau.(2022).Assessing the representativity of NH3 measurements influenced by boundary-layer dynamics and the turbulent dispersion of a nearby emission source.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(12),17.
MLA	Schulte, Ruben B.,et al."Assessing the representativity of NH3 measurements influenced by boundary-layer dynamics and the turbulent dispersion of a nearby emission source".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.12(2022):17.