 Subjects -> METEOROLOGY (Total: 106 journals)
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- Simulation of organic aerosol, its precursors, and related oxidants in the
Landes pine forest in southwestern France: accounting for domain-specific
land use and physical conditions
Abstract: Simulation of organic aerosol, its precursors, and related oxidants in the Landes pine forest in southwestern France: accounting for domain-specific land use and physical conditions
Arineh Cholakian, Matthias Beekmann, Guillaume Siour, Isabelle Coll, Manuela Cirtog, Elena Ormeño, Pierre-Marie Flaud, Emilie Perraudin, and Eric Villenave
Atmos. Chem. Phys., 23, 3679–3706, https://doi.org/10.5194/acp-23-3679-2023, 2023
This article revolves around the simulation of biogenic secondary organic aerosols in the Landes forest (southwestern France). Several sensitivity cases involving biogenic emission factors, land cover data, anthropogenic emissions, and physical or meteorological parameters were performed and each compared to measurements both in the forest canopy and around the forest. The chemistry behind the formation of these aerosols and their production and transport in the forest canopy is discussed.
PubDate: Tue, 28 Mar 2023 00:54:12 +020
DOI: 10.5194/acp-23-3679-2023 2023
- A combined gas- and particle-phase analysis of highly oxygenated organic
molecules (HOMs) from α-pinene ozonolysis
Abstract: A combined gas- and particle-phase analysis of highly oxygenated organic molecules (HOMs) from α-pinene ozonolysis
Jian Zhao, Ella Häkkinen, Frans Graeffe, Jordan E. Krechmer, Manjula R. Canagaratna, Douglas R. Worsnop, Juha Kangasluoma, and Mikael Ehn
Atmos. Chem. Phys., 23, 3707–3730, https://doi.org/10.5194/acp-23-3707-2023, 2023
Based on the combined measurements of gas- and particle-phase highly oxygenated organic molecules (HOMs) from α-pinene ozonolysis, enhancement of dimers in particles was observed. We conducted experiments wherein the dimer to monomer (D / M) ratios of HOMs in the gas phase were modified (adding CO / NO) to investigate the effects of the corresponding D / M ratios in the particles. These results are important for a better understanding of secondary organic aerosol formation in the atmosphere.
PubDate: Tue, 28 Mar 2023 00:54:12 +020
DOI: 10.5194/acp-23-3707-2023 2023
- Improving ozone simulations in Asia via multisource data assimilation:
results from an observing system simulation experiment with GEMS
geostationary satellite observations
Abstract: Improving ozone simulations in Asia via multisource data assimilation: results from an observing system simulation experiment with GEMS geostationary satellite observations
Lei Shu, Lei Zhu, Juseon Bak, Peter Zoogman, Han Han, Song Liu, Xicheng Li, Shuai Sun, Juan Li, Yuyang Chen, Dongchuan Pu, Xiaoxing Zuo, Weitao Fu, Xin Yang, and Tzung-May Fu
Atmos. Chem. Phys., 23, 3731–3748, https://doi.org/10.5194/acp-23-3731-2023, 2023
We quantify the benefit of multisource observations (GEMS, LEO satellite, and surface) on ozone simulations in Asia. Data assimilation improves the monitoring of exceedance, spatial pattern, and diurnal variation of surface ozone, with the regional mean bias reduced from −2.1 to −0.2 ppbv. Data assimilation also better represents ozone vertical distributions in the middle to upper troposphere at low latitudes. Our results offer a valuable reference for future ozone simulations.
PubDate: Tue, 28 Mar 2023 00:54:12 +020
DOI: 10.5194/acp-23-3731-2023 2023
- Mobile MAX-DOAS observations of tropospheric NO2 and HCHO during summer
over the Three Rivers' Source region in China
Abstract: Mobile MAX-DOAS observations of tropospheric NO2 and HCHO during summer over the Three Rivers' Source region in China
Siyang Cheng, Xinghong Cheng, Jianzhong Ma, Xiangde Xu, Wenqian Zhang, Jinguang Lv, Gang Bai, Bing Chen, Siying Ma, Steffen Ziegler, Sebastian Donner, and Thomas Wagner
Atmos. Chem. Phys., 23, 3655–3677, https://doi.org/10.5194/acp-23-3655-2023, 2023
We made mobile MAX-DOAS measurements in the background atmosphere over the Tibetan Plateau in summer 2021. We retrieved the tropospheric NO2 and HCHO vertical column densities (VCDs) along extended driving routes and found a decreasing trend of the VCDs with altitude. Elevated NO2 VCDs along the driving routes could be attributed to enhanced traffic emissions from the towns crossed. The spatio-temporal distribution of the HCHO VCDs correlated strongly with the surface temperature.
PubDate: Mon, 27 Mar 2023 00:54:12 +020
DOI: 10.5194/acp-23-3655-2023 2023
- Modelling the European wind-blown dust emissions and their impact on
particulate matter (PM) concentrations
Abstract: Modelling the European wind-blown dust emissions and their impact on particulate matter (PM) concentrations
Marina Liaskoni, Peter Huszar, Lukáš Bartík, Alvaro Patricio Prieto Perez, Jan Karlický, and Ondřej Vlček
Atmos. Chem. Phys., 23, 3629–3654, https://doi.org/10.5194/acp-23-3629-2023, 2023
Wind-blown dust (WBD) emissions emitted from European soils are estimated for the 2007–2016 period, and their impact on the total particulate matter (PM) concentration is calculated. We found a considerable increase in PM concentrations due to such emissions, especially on selected days (rather than on a seasonal average). We also found that WBD emissions are strongest over western Europe, and the highest impacts on PM are calculated for this region.
PubDate: Mon, 27 Mar 2023 00:54:12 +020
DOI: 10.5194/acp-23-3629-2023 2023
- Technical note: Unsupervised classification of ozone profiles in UKESM1
Abstract: Technical note: Unsupervised classification of ozone profiles in UKESM1
Fouzia Fahrin, Daniel C. Jones, Yan Wu, James Keeble, and Alexander T. Archibald
Atmos. Chem. Phys., 23, 3609–3627, https://doi.org/10.5194/acp-23-3609-2023, 2023
We use a machine learning technique called Gaussian mixture modeling (GMM) to classify vertical ozone profiles into groups based on how the ozone concentration changes with pressure. Even though the GMM algorithm was not provided with spatial information, the classes are geographically coherent. We also detect signatures of tropical broadening in UKESM1 future climate scenarios. GMM may be useful for understanding ozone structures in modeled and observed datasets.
PubDate: Fri, 24 Mar 2023 01:15:19 +010
DOI: 10.5194/acp-23-3609-2023 2023
- Local and remote climate impacts of future African aerosol emissions
Abstract: Local and remote climate impacts of future African aerosol emissions
Christopher D. Wells, Matthew Kasoar, Nicolas Bellouin, and Apostolos Voulgarakis
Atmos. Chem. Phys., 23, 3575–3593, https://doi.org/10.5194/acp-23-3575-2023, 2023
The climate is altered by greenhouse gases and air pollutant particles, and such emissions are likely to change drastically in the future over Africa. Air pollutants do not travel far, so their climate effect depends on where they are emitted. This study uses a climate model to find the climate impacts of future African pollutant emissions being either high or low. The particles absorb and scatter sunlight, causing the ground nearby to be cooler, but elsewhere the increased heat causes warming.
PubDate: Thu, 23 Mar 2023 01:15:19 +010
DOI: 10.5194/acp-23-3575-2023 2023
- Elucidating ozone and PM2.5 pollution in the Fenwei Plain reveals the
co-benefits of controlling precursor gas emissions in winter haze
Abstract: Elucidating ozone and PM2.5 pollution in the Fenwei Plain reveals the co-benefits of controlling precursor gas emissions in winter haze
Chunshui Lin, Ru-Jin Huang, Haobin Zhong, Jing Duan, Zixi Wang, Wei Huang, and Wei Xu
Atmos. Chem. Phys., 23, 3595–3607, https://doi.org/10.5194/acp-23-3595-2023, 2023
The complex interaction between O3 and PM2.5, coupled with the topology of the Fenwei Plain and the evolution of the boundary layer height, highlights the challenges in further reducing particulate pollution in winter despite years of efforts to reduce emissions. Through scenario analysis in a chemical box model constrained by observation, we show the co-benefits of reducing NOx and VOCs simultaneously in reducing ozone and SOA.
PubDate: Thu, 23 Mar 2023 01:15:19 +010
DOI: 10.5194/acp-23-3595-2023 2023
- Measurement report: Stoichiometry of dissolved iron and aluminum as an
indicator of the factors controlling the fractional solubility of aerosol
iron: Results of the annual observations of size-fractionated aerosol
particles in Japan
Abstract: Measurement report: Stoichiometry of dissolved iron and aluminum as an indicator of the factors controlling the fractional solubility of aerosol iron: Results of the annual observations of size-fractionated aerosol particles in Japan
Kohei Sakata, Aya Sakaguchi, Yoshiaki Yamakawa, Chihiro Miyamoto, Minako Kurisu, and Yoshio Takahashi
Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2023-20,2023
Preprint under review for ACP (discussion: open, 0 comments)
Anthropogenic iron is the dominant source of dissolved Fe in aerosol particles, but its contribution to dissolved Fe in aerosol particles has not been quantitatively evaluated. We established the molar concentration ratio of dissolved Fe to dissolved Al as a new indicator to evaluate the contribution of anthropogenic iron. As a result, about 10 % of dissolved Fe in aerosol particles was derived from anthropogenic iron when aerosol particles were transported from East Asia to the Pacific Ocean.
PubDate: Thu, 23 Mar 2023 01:15:19 +010
DOI: 10.5194/acp-2023-202023
- Surface-based observations of cold-air outbreak clouds during the COMBLE
field campaign
Abstract: Surface-based observations of cold-air outbreak clouds during the COMBLE field campaign
Zackary Mages, Pavlos Kollias, Zeen Zhu, and Edward P. Luke
Atmos. Chem. Phys., 23, 3561–3574, https://doi.org/10.5194/acp-23-3561-2023, 2023
Cold-air outbreaks (when cold air is advected over warm water and creates low-level convection) are a dominant cloud regime in the Arctic, and we capitalized on ground-based observations, which did not previously exist, from the COMBLE field campaign to study them. We characterized the extent and strength of the convection and turbulence and found evidence of secondary ice production. This information is useful for model intercomparison studies that will represent cold-air outbreak processes.
PubDate: Wed, 22 Mar 2023 01:02:33 +010
DOI: 10.5194/acp-23-3561-2023 2023
- Seasonal variation of aerosol iron solubility in coarse and fine particles
at an inland city in northwestern China
Abstract: Seasonal variation of aerosol iron solubility in coarse and fine particles at an inland city in northwestern China
Huanhuan Zhang, Rui Li, Chengpeng Huang, Xiaofei Li, Shuwei Dong, Fu Wang, Tingting Li, Yizhu Chen, Guohua Zhang, Yan Ren, Qingcai Chen, Ru-jin Huang, Siyu Chen, Tao Xue, Xinming Wang, and Mingjin Tang
Atmos. Chem. Phys., 23, 3543–3559, https://doi.org/10.5194/acp-23-3543-2023, 2023
This work investigated the seasonal variation of aerosol Fe solubility for coarse and fine particles in Xi’an, a megacity in northwestern China severely affected by anthropogenic emission and desert dust aerosol. In addition, we discussed in depth what controlled aerosol Fe solubility at different seasons for coarse and fine particles.
PubDate: Wed, 22 Mar 2023 01:02:33 +010
DOI: 10.5194/acp-23-3543-2023 2023
- Characterisations of Europe's integrated water vapour and assessments of
atmospheric reanalyses using more than 2 decades of ground-based GPS
Abstract: Characterisations of Europe's integrated water vapour and assessments of atmospheric reanalyses using more than 2 decades of ground-based GPS
Peng Yuan, Roeland Van Malderen, Xungang Yin, Hannes Vogelmann, Weiping Jiang, Joseph Awange, Bernhard Heck, and Hansjörg Kutterer
Atmos. Chem. Phys., 23, 3517–3541, https://doi.org/10.5194/acp-23-3517-2023, 2023
Water vapour plays an important role in various weather and climate processes. However, due to its large spatiotemporal variability, its high-accuracy quantification remains a challenge. In this study, 20+ years of GPS-derived integrated water vapour (IWV) retrievals in Europe were obtained. They were then used to characterise the temporal features of Europe's IWV and assess six atmospheric reanalyses. Results show that ERA5 outperforms the other reanalyses at most temporal scales.
PubDate: Tue, 21 Mar 2023 01:02:33 +010
DOI: 10.5194/acp-23-3517-2023 2023
- The dependence of aerosols' global and local precipitation impacts on the
emitting region
Abstract: The dependence of aerosols' global and local precipitation impacts on the emitting region
Geeta G. Persad
Atmos. Chem. Phys., 23, 3435–3452, https://doi.org/10.5194/acp-23-3435-2023, 2023
Human-induced aerosol pollution has major impacts on both local and global precipitation. This study demonstrates using a global climate model that both the strength and localization of aerosols' precipitation impacts are highly dependent on which region the aerosols are emitted from. The findings highlight that the geographic distribution of human-induced aerosol emissions must be accounted for when quantifying their influence on global precipitation.
PubDate: Mon, 20 Mar 2023 01:02:33 +010
DOI: 10.5194/acp-23-3435-2023 2023
- Vehicle-based in situ observations of the water vapor isotopic composition
across China: spatial and seasonal distributions and controls
Abstract: Vehicle-based in situ observations of the water vapor isotopic composition across China: spatial and seasonal distributions and controls
Di Wang, Lide Tian, Camille Risi, Xuejie Wang, Jiangpeng Cui, Gabriel J. Bowen, Kei Yoshimura, Zhongwang Wei, and Laurent Z. X. Li
Atmos. Chem. Phys., 23, 3409–3433, https://doi.org/10.5194/acp-23-3409-2023, 2023
To better understand the spatial and temporal distribution of vapor isotopes, we present two vehicle-based spatially continuous snapshots of the near-surface vapor isotopes in China during the pre-monsoon and monsoon periods. These observations are explained well by different moisture sources and processes along the air mass trajectories. Our results suggest that proxy records need to be interpreted in the context of regional systems and sources of moisture.
PubDate: Mon, 20 Mar 2023 01:02:33 +010
DOI: 10.5194/acp-23-3409-2023 2023
- Estimating enhancement ratios of nitrogen dioxide, carbon monoxide and
carbon dioxide using satellite observations
Abstract: Estimating enhancement ratios of nitrogen dioxide, carbon monoxide and carbon dioxide using satellite observations
Cameron G. MacDonald, Jon-Paul Mastrogiacomo, Joshua L. Laughner, Jacob K. Hedelius, Ray Nassar, and Debra Wunch
Atmos. Chem. Phys., 23, 3493–3516, https://doi.org/10.5194/acp-23-3493-2023, 2023
We use three satellites measuring carbon dioxide (CO2), carbon monoxide (CO) and nitrogen dioxide (NO2) to calculate atmospheric enhancements of these gases from 27 urban areas. We calculate enhancement ratios between the species and compare those to ratios derived from four globally gridded anthropogenic emission inventories. We find that the global inventories generally underestimate CO emissions in many North American and European cities relative to our observed enhancement ratios.
PubDate: Mon, 20 Mar 2023 01:02:33 +010
DOI: 10.5194/acp-23-3493-2023 2023
- Assessing the climate and air quality effects of future aerosol mitigation
in India using a global climate model combined with statistical
downscaling
Abstract: Assessing the climate and air quality effects of future aerosol mitigation in India using a global climate model combined with statistical downscaling
Tuuli Miinalainen, Harri Kokkola, Antti Lipponen, Antti-Pekka Hyvärinen, Vijay Kumar Soni, Kari E. J. Lehtinen, and Thomas Kühn
Atmos. Chem. Phys., 23, 3471–3491, https://doi.org/10.5194/acp-23-3471-2023, 2023
We simulated the effects of aerosol emission mitigation on both global and regional radiative forcing and city-level air quality with a global-scale climate model. We used a machine learning downscaling approach to bias-correct the PM2.5 values obtained from the global model for the Indian megacity New Delhi. Our results indicate that aerosol mitigation could result in both improved air quality and less radiative heating for India.
PubDate: Mon, 20 Mar 2023 01:02:33 +010
DOI: 10.5194/acp-23-3471-2023 2023
- Boundary layer moisture variability at the Atmospheric Radiation
Measurement (ARM) Eastern North Atlantic observatory during marine
conditions
Abstract: Boundary layer moisture variability at the Atmospheric Radiation Measurement (ARM) Eastern North Atlantic observatory during marine conditions
Maria P. Cadeddu, Virendra P. Ghate, David D. Turner, and Thomas E. Surleta
Atmos. Chem. Phys., 23, 3453–3470, https://doi.org/10.5194/acp-23-3453-2023, 2023
We analyze the variability in marine boundary layer moisture at the Eastern North Atlantic site on a monthly and daily temporal scale and examine its fundamental role in the control of boundary layer cloudiness and precipitation. The study also highlights the complex interaction between large-scale and local processes controlling the boundary layer moisture and the importance of the mesoscale spatial distribution of vapor to support convection and precipitation.
PubDate: Mon, 20 Mar 2023 01:02:33 +010
DOI: 10.5194/acp-23-3453-2023 2023
- The Impact of Background ENSO and NAO Conditions and Anomalies on the
Modeled Response to Pinatubo-Sized Volcanic Forcing
Abstract: The Impact of Background ENSO and NAO Conditions and Anomalies on the Modeled Response to Pinatubo-Sized Volcanic Forcing
Helen Weierbach, Allegra N. LeGrande, and Kostas Tsigaridis
Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2023-54,2023
Preprint under review for ACP (discussion: open, 0 comments)
Volcanic aerosols impact global and regional climate conditions but can vary depending on pre-existing background climate conditions. We run an ensemble of volcanic aerosol simulations under varying ENSO and NAO background conditions to understand how background state impacts the modeled response. Overall we find that background NAO conditions can impact the strength of the first winter post-eruptive response, but are also affected by the choice of anomaly and sampling routine.
PubDate: Mon, 20 Mar 2023 01:02:33 +010
DOI: 10.5194/acp-2023-542023
- A three-dimensional simulation and process analysis of tropospheric ozone
depletion events (ODEs) during the springtime in the Arctic using CMAQ
(Community Multiscale Air Quality Modeling System)
Abstract: A three-dimensional simulation and process analysis of tropospheric ozone depletion events (ODEs) during the springtime in the Arctic using CMAQ (Community Multiscale Air Quality Modeling System)
Le Cao, Simeng Li, Yicheng Gu, and Yuhan Luo
Atmos. Chem. Phys., 23, 3363–3382, https://doi.org/10.5194/acp-23-3363-2023, 2023
We performed a 3-D mesoscale model study on ozone depletion events (ODEs) occurring in the spring of 2019 at Barrow using an air quality model, CMAQ. Many ODEs observed at Barrow were captured by the model, and the contribution from each physical or chemical process to ozone and bromine species during ODEs was quantitatively evaluated. We found the ODEs at Barrow to be strongly influenced by horizontal transport. In contrast, over the sea, local chemistry significantly reduced the surface ozone.
PubDate: Fri, 17 Mar 2023 23:23:55 +010
DOI: 10.5194/acp-23-3363-2023 2023
- A high-resolution satellite-based map of global methane emissions reveals
missing wetland, fossil fuel, and monsoon sources
Abstract: A high-resolution satellite-based map of global methane emissions reveals missing wetland, fossil fuel, and monsoon sources
Xueying Yu, Dylan B. Millet, Daven K. Henze, Alexander J. Turner, Alba Lorente Delgado, A. Anthony Bloom, and Jianxiong Sheng
Atmos. Chem. Phys., 23, 3325–3346, https://doi.org/10.5194/acp-23-3325-2023, 2023
We combine satellite measurements with a novel downscaling method to map global methane emissions at 0.1°×0.1° resolution. These fine-scale emission estimates reveal unreported emission hotspots and shed light on the roles of agriculture, wetlands, and fossil fuels for regional methane budgets. The satellite-derived emissions point in particular to missing fossil fuel emissions in the Middle East and to a large emission underestimate in South Asia that appears to be tied to monsoon rainfall.
PubDate: Fri, 17 Mar 2023 23:23:55 +010
DOI: 10.5194/acp-23-3325-2023 2023
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