Measurement report: Ammonia in Paris derived from ground-based open-path and satellite observations DOI Creative Commons

Camille Viatte,

Nadir Guendouz,

Clarisse Dufaux

et al.

Atmospheric chemistry and physics, Journal Year: 2023, Volume and Issue: 23(24), P. 15253 - 15267

Published: Dec. 14, 2023

Abstract. Ammonia (NH3) is an important air pollutant which, as a precursor of fine particulate matter, raises public health concerns. This study analyzes 2.5 years NH3 observations derived from ground-based (miniDOAS; differential optical absorption spectroscopy) and satellite (IASI; Infrared Atmospheric Sounding Interferometer) remote sensing instruments to quantify, for the first time, temporal variabilities (from interannual diurnal) in concentrations Paris. The IASI miniDOAS datasets are found be relatively good agreement (R>0.70) when atmospheric high driven by regional agricultural activities. Over investigated period (January 2020–June 2022), average Paris measured 2.23 µg m−3 7.10×1015 molec. cm−2, respectively, which lower than or equivalent those documented other urban areas. seasonal monthly sporadic emissions influenced meteorological conditions, with spring up 2 times higher seasons. potential source contribution function (PSCF) reveals that close (100–200 km) east northeast regions constitute most emission areas megacity. Weekly cycles show different ammonia sources In spring, agriculture has major influence on concentrations, and, seasons, multi-platform suggest also controlled traffic-related emissions. Paris, diurnal cycle very similar one NO2, morning enhancements coincident intensified road traffic. evening synchronous rush hours monitored winter fall. during weekends consistently weekdays summer further evidence significant traffic

Language: Английский

Updating On-Road Vehicle Emissions for China: Spatial Patterns, Temporal Trends, and Mitigation Drivers DOI
Yifan Wen, Min Liu, Shaojun Zhang

et al.

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(38), P. 14299 - 14309

Published: Sept. 14, 2023

Vehicle emissions in China have been decoupled from rapid motorization owing to comprehensive control strategies. China's increasingly ambitious goals for better air quality are calling deep emission mitigation, posing a need develop an up-to-date inventory that can reflect the fast-developing policies on vehicle control. Herein, large-sample measurements were collected update inventory. For instance, ambient temperature correction modules developed depict remarkable regional and seasonal variations, showing monthly disparities total hydrocarbon (THC) nitrogen oxide (NOX) January July could be up 1.7 times northern China. Thus, ratios of THC NOX vary dramatically among various seasons provinces, which not considered well by previous simulations regarding nonlinear atmospheric chemistry ozone (O3) fine particulate matter (PM2.5) formation. The new results indicate vehicular carbon monoxide (CO), THC, PM2.5 decreased 69, 51, 61%, respectively, during 2010-2019. However, controls ammonia (NH3) as efficient other pollutants. Under most likely future scenario (PC [1]), CO, NOX, PM2.5, NH3 anticipated reduce 35, 36, 45, 4%, 2019 2025. These reductions will expedited with expected decreases 56, 58, 74, 53, 51% 2025 2035, substantially promoted massive deployment energy vehicles more stringent standards. updated serve important tool season- location-specific mitigation strategies precursors alleviate haze O3 problems.

Language: Английский

Citations

25
The global impact of the transport sectors on the atmospheric aerosol and the resulting climate effects under the Shared Socioeconomic Pathways (SSPs) DOI Creative Commons
Mattia Righi,

Johannes Hendricks,

Sabine Brinkop

et al.

Earth System Dynamics, Journal Year: 2023, Volume and Issue: 14(4), P. 835 - 859

Published: Aug. 29, 2023

Abstract. A global aerosol–climate model is applied to quantify the impact of transport sectors (land transport, shipping, and aviation) on aerosol climate. Global simulations are performed for present day (2015), based emission inventory Climate Model Intercomparison Project Phase 6 (CMIP6), near-term (2030) mid-term (2050) future projections, under Shared Socioeconomic Pathways (SSPs). The results show that land emissions have a large near-surface concentrations black carbon nitrate over most populated areas globe, but with contrasting patterns in terms relative contributions between developed developing countries. In spite recently introduced regulations limit fuel sulfur content shipping sector, still responsible considerable sulfate concentrations, about 0.5 1 µg m−3 travelled regions, significant effects continental air pollution northern polar regions as well. Aviation impacts mass found be quite small, order few nanograms per cubic metre, while this sector considerably affects particle number contributing up 20 %–30 % upper-tropospheric concentration at mid-latitudes. transport-induced result present-day radiative forcing −164, −145, −64 mW m−2 aviation, respectively, dominating contribution by aerosol–cloud interactions. These forcings represent marked offset CO2 warming from therefore very relevant climate policy. projections SSPs generally consistent narratives underlying these scenarios: lowest both simulated SSP1, especially SSP3 characterized largest effects. Notable exceptions picture, however, exist, other anthropogenic also contribute overall thus modulate relevance different scenarios, not always consistently their storyline. On qualitative level, mostly confirm findings our previous assessment year 2000, which used predecessor version same CMIP5 data. Some important quantitative differences found, can ascribed improved representation background study.

Language: Английский

Citations

15
Significant Increase in Ammonia Emissions in China: Considering Nonagricultural Sectors Based on Isotopic Source Apportionment DOI
Fenghua Yan, Weihua Chen, Xuemei Wang

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(5), P. 2423 - 2433

Published: Jan. 25, 2024

Isotopic source apportionment results revealed that nonagricultural sectors are significant sources of ammonia (NH3) emissions, particularly in urban areas. Unfortunately, have been substantially underrepresented the current anthropogenic NH3 emission inventories (EIs). Here, we propose a novel approach to develop gridded EI China for 2016 using combination isotopic and ratios carbon monoxide (CO) NH3. We estimated isotope-corrected emissions were 4370 Gg 2016, accounting an increase total from 7 31%. As result, compared original EI, annual increased by 35%. Thus, comparison simulation driven WRF-Chem model has reduced biases surface concentrations dry deposition flux nitrogen (NHx = gaseous + particulate NH4+) 23 31%, respectively. This study may wide-ranging implications formulating targeted strategies controls, making it facilitate achievement simultaneously alleviating atmospheric pollution future.

Language: Английский

Citations

5
Summertime Urban Ammonia Emissions May Be Substantially Underestimated in Beijing, China DOI
Jiayu Xu,

Mengran Lu,

Yixin Guo

et al.

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(35), P. 13124 - 13135

Published: Aug. 24, 2023

Ammonia (NH3) is critical to the nitrogen cycle and PM2.5 formation, yet a great deal of uncertainty exists in its urban emission quantifications. Model-underestimated NH3 concentrations have been reported for cities, few studies provided an explanation. Here, we explore reasons severe WRF-Chem model underestimations Beijing August 2018, including simulated gas-particle partitioning, meteorology, regional transport, emissions, using spatially refined (3 km resolution) estimates agricultural sector Beijing-Tianjin-Hebei traffic Beijing. We find that are significantly lower than ground-based satellite observations during Beijing, while wintertime much more moderate. Further analyses sensitivity experiments show such discrepancies cannot be attributed factors other biases emissions. Using site measurements as constraints, estimate both non-agricultural totals shall increase by ∼5 times match observations. Future research should performed allocate fertilizer, power, traffic, or residential sources. Dense regular necessary constrain validate bottom-up inventories NHx simulation.

Language: Английский

Citations

12
Characteristics of NOX and NH3 emissions from in-use heavy-duty diesel vehicles with various aftertreatment technologies in China DOI
Liqiang He, Gang Li, Xiaomeng Wu

et al.

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 465, P. 133073 - 133073

Published: Nov. 25, 2023

Language: Английский

Citations

12
Modeling the Impact of the Bidirectional Exchange of NH3 From the Great Lakes on a Regional and Local Scale Using GEM‐MACH DOI Creative Commons
Matthew Davis, J. G. Murphy, Michael Sitwell

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2025, Volume and Issue: 130(4)

Published: Feb. 19, 2025

Abstract Ammonia emissions from oceans are recognized as one of the most significant natural sources ammonia globally; however, freshwater rarely considered significant. The Great Lakes region, containing largest network lakes in world, and a urbanized population exceeding 20 million, provides unique opportunity to evaluate potential for lacustrine (lake‐associated) surfaces contribute regional levels. In this work, we combine an analysis years water quality data region with GEM‐MACH (Global Environmental Multiscale (GEM)‐Modelling Air CHemistry (MACH)) chemical transport model examine influence on atmospheric ammonia. This demonstrates that while levels largely controlled by known terrestrial anthropogenic sources, emission only 200 increase summertime (July–September) monthly average (NH 3 ) 5%–8% over urban centers, daily increases up 10%–20%. Supplemental measurements collected within 1 km offshore Greater Toronto Area were found have 2000, suggesting large areas could be significantly larger than those predicted GEM‐MACH. Our findings reveal may represent regionally source atmosphere.

Language: Английский

Citations

0
Characteristics, regional transport and control strategies of atmospheric ammonia in urban Taiyuan, Fenwei Plain, China DOI

Mingquan Ren,

Lili Guo, Yang Cui

et al.

Atmospheric Pollution Research, Journal Year: 2025, Volume and Issue: unknown, P. 102505 - 102505

Published: March 1, 2025

Language: Английский

Citations

0
A Novel CNN-Transformer Fusion Framework for Accurate Prediction of NH3 Emissions from Diesel Vehicles DOI

Xiaoxin Bai,

Xiangyang Guo, Chunling Wu

et al.

Environmental science and engineering, Journal Year: 2025, Volume and Issue: unknown, P. 135 - 146

Published: Jan. 1, 2025

Language: Английский

Citations

0
Research progress in ceria-based catalysts for the selective catalytic oxidation of NH<sub>3</sub> DOI Open Access

Yandi Cai,

Xiaoyu Ji,

Bifeng Zhang

et al.

Scientia Sinica Chimica, Journal Year: 2024, Volume and Issue: 54(3), P. 295 - 308

Published: Jan. 15, 2024

The inadvertent release of ammonia into the atmosphere poses a significant threat to both human health and environment. To mitigate NH3 slip from industry (stationary source) vehicle (mobile emission control systems, selective catalytic oxidation (NH3-SCO) technique has been developed, with catalyst efficiency at its core. Ceria-based materials, renowned for their superior redox capacity, tunable surface states, facile formation robust metal-support interactions, are extensively employed in crafting NH3-SCO catalysts. This paper provides comprehensive synthesis review current research progress ceria-based catalysts, offering insights future development directions.

Language: Английский

Citations

2
High spatiotemporal resolution ammonia emission inventory from typical industrial and agricultural province of China from 2000 to 2020 DOI
Chuanyong Zhu, Renqiang Li,

Mengyi Qiu

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 918, P. 170732 - 170732

Published: Feb. 8, 2024

Language: Английский

Citations

2