 Subjects -> METEOROLOGY (Total: 106 journals)
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- A new insight into the vertical differences in NO2 heterogeneous reaction
to produce HONO over inland and marginal seas
Abstract: A new insight into the vertical differences in NO2 heterogeneous reaction to produce HONO over inland and marginal seas
Chengzhi Xing, Shiqi Xu, Yuhang Song, Cheng Liu, Yuhan Liu, Keding Lu, Wei Tan, Chengxin Zhang, Qihou Hu, Shanshan Wang, Hongyu Wu, and Hua Lin
Atmos. Chem. Phys., 23, 5815–5834, https://doi.org/10.5194/acp-23-5815-2023, 2023
High RH could contribute to the secondary formation of HONO in the sea atmosphere. High temperature could promote the formation of HONO from NO2 heterogeneous reactions in the sea and coastal atmosphere. The aerosol surface plays a more important role during the above process in coastal and sea cases. The generation rate of HONO from the NO2 heterogeneous reaction in the sea cases is larger than that in inland cases in higher atmospheric layers above 600 m.
PubDate: Fri, 26 May 2023 00:00:43 +020
DOI: 10.5194/acp-23-5815-2023 2023
- Convective organization and 3D structure of tropical cloud systems deduced
from synergistic A-Train observations and machine learning
Abstract: Convective organization and 3D structure of tropical cloud systems deduced from synergistic A-Train observations and machine learning
Claudia J. Stubenrauch, Giulio Mandorli, and Elisabeth Lemaitre
Atmos. Chem. Phys., 23, 5867–5884, https://doi.org/10.5194/acp-23-5867-2023, 2023
Organized convection leads to large convective cloud systems and intense rain and may change with a warming climate. Their complete 3D description, attained by machine learning techniques in combination with various satellite observations, together with a cloud system concept, link convection to anvil properties, while convective organization can be identified by the horizontal structure of intense rain.
PubDate: Fri, 26 May 2023 00:00:43 +020
DOI: 10.5194/acp-23-5867-2023 2023
- Changes in global teleconnection patterns under global warming and
stratospheric aerosol intervention scenarios
Abstract: Changes in global teleconnection patterns under global warming and stratospheric aerosol intervention scenarios
Abolfazl Rezaei, Khalil Karami, Simone Tilmes, and John C. Moore
Atmos. Chem. Phys., 23, 5835–5850, https://doi.org/10.5194/acp-23-5835-2023, 2023
Teleconnection patterns are important characteristics of the climate system; well-known examples include the El Niño and La Niña events driven from the tropical Pacific. We examined how spatiotemporal patterns that arise in the Pacific and Atlantic oceans behave under stratospheric aerosol geoengineering and greenhouse gas (GHG)-induced warming. In general, geoengineering reverses trends; however, the changes in decadal oscillation for the AMO, NAO, and PDO imposed by GHG are not suppressed.
PubDate: Fri, 26 May 2023 00:00:43 +020
DOI: 10.5194/acp-23-5835-2023 2023
- On the importance of multiphase photolysis of organic nitrates on their
global atmospheric removal
Abstract: On the importance of multiphase photolysis of organic nitrates on their global atmospheric removal
Juan Miguel González-Sánchez, Nicolas Brun, Junteng Wu, Sylvain Ravier, Jean-Louis Clément, and Anne Monod
Atmos. Chem. Phys., 23, 5851–5866, https://doi.org/10.5194/acp-23-5851-2023, 2023
Organic nitrates play a crucial role in air pollution, as they are NOx reservoirs. This work investigated for the first time their reactivity with light in the aqueous phase (cloud and fog and wet aerosol), proving it slower than in the gas phase. Therefore, our findings reveal that partitioning of organic nitrates in the aqueous phase leads to longer atmospheric lifetimes of these compounds and thus a broader spatial distribution of their related pollution.
PubDate: Fri, 26 May 2023 00:00:43 +020
DOI: 10.5194/acp-23-5851-2023 2023
- Large simulated future changes in the nitrate radical under the CMIP6 SSP
scenarios: implications for oxidation chemistry
Abstract: Large simulated future changes in the nitrate radical under the CMIP6 SSP scenarios: implications for oxidation chemistry
Scott Archer-Nicholls, Rachel Allen, Nathan L. Abraham, Paul T. Griffiths, and Alex T. Archibald
Atmos. Chem. Phys., 23, 5801–5813, https://doi.org/10.5194/acp-23-5801-2023, 2023
The nitrate radical is a major oxidant at nighttime, but much less is known about it than about the other oxidants ozone and OH. We use Earth system model calculations to show how the nitrate radical has changed in abundance from 1850–2014 and to 2100 under a range of different climate and emission scenarios. Depending on the emissions and climate scenario, significant increases are projected with implications for the oxidation of volatile organic compounds and the formation of fine aerosol.
PubDate: Wed, 24 May 2023 01:21:16 +020
DOI: 10.5194/acp-23-5801-2023 2023
- Progress in investigating long-term trends in the mesosphere,
thermosphere, and ionosphere
Abstract: Progress in investigating long-term trends in the mesosphere, thermosphere, and ionosphere
Jan Laštovička
Atmos. Chem. Phys., 23, 5783–5800, https://doi.org/10.5194/acp-23-5783-2023, 2023
Increasing concentration of greenhouse gases, particularly of CO2, in the atmosphere causes well-known heating of the troposphere and surface. However, the increasing concentration of CO2 also affects higher levels of the atmosphere, the stratosphere, mesosphere, thermosphere, and ionosphere, where it results in remarkable long-term trends. This article reviews significant progress in investigations of long-term trends in the mesosphere, thermosphere, and ionosphere during the period 2018–2022.
PubDate: Wed, 24 May 2023 01:21:16 +020
DOI: 10.5194/acp-23-5783-2023 2023
- Long-term variability in immersion-mode marine ice-nucleating particles
from climate model simulations and observations
Abstract: Long-term variability in immersion-mode marine ice-nucleating particles from climate model simulations and observations
Aishwarya Raman, Thomas Hill, Paul J. DeMott, Balwinder Singh, Kai Zhang, Po-Lun Ma, Mingxuan Wu, Hailong Wang, Simon P. Alexander, and Susannah M. Burrows
Atmos. Chem. Phys., 23, 5735–5762, https://doi.org/10.5194/acp-23-5735-2023, 2023
Ice-nucleating particles (INPs) play an important role in cloud processes and associated precipitation. Yet, INPs are not accurately represented in climate models. This study attempts to uncover these gaps by comparing model-simulated INP concentrations against field campaign measurements in the SO for an entire year, 2017–2018. Differences in INP concentrations and variability between the model and observations have major implications for modeling cloud properties in high latitudes.
PubDate: Tue, 23 May 2023 01:21:16 +020
DOI: 10.5194/acp-23-5735-2023 2023
- Simulating organic aerosol in Delhi with WRF-Chem using the
volatility-basis-set approach: exploring model uncertainty with a Gaussian
process emulator
Abstract: Simulating organic aerosol in Delhi with WRF-Chem using the volatility-basis-set approach: exploring model uncertainty with a Gaussian process emulator
Ernesto Reyes-Villegas, Douglas Lowe, Jill S. Johnson, Kenneth S. Carslaw, Eoghan Darbyshire, Michael Flynn, James D. Allan, Hugh Coe, Ying Chen, Oliver Wild, Scott Archer-Nicholls, Alex Archibald, Siddhartha Singh, Manish Shrivastava, Rahul A. Zaveri, Vikas Singh, Gufran Beig, Ranjeet Sokhi, and Gordon McFiggans
Atmos. Chem. Phys., 23, 5763–5782, https://doi.org/10.5194/acp-23-5763-2023, 2023
Organic aerosols (OAs), their sources and their processes remain poorly understood. The volatility basis set (VBS) approach, implemented in air quality models such as WRF-Chem, can be a useful tool to describe primary OA (POA) production and aging. However, the main disadvantage is its complexity. We used a Gaussian process simulator to reproduce model results and to estimate the sources of model uncertainty. We do this by comparing the outputs with OA observations made at Delhi, India, in 2018.
PubDate: Tue, 23 May 2023 01:21:16 +020
DOI: 10.5194/acp-23-5763-2023 2023
- On the formation of highly oxidized pollutants by autoxidation of terpenes
under low-temperature-combustion conditions: the case of limonene and
α-pinene
Abstract: On the formation of highly oxidized pollutants by autoxidation of terpenes under low-temperature-combustion conditions: the case of limonene and α-pinene
Roland Benoit, Nesrine Belhadj, Zahraa Dbouk, Maxence Lailliau, and Philippe Dagaut
Atmos. Chem. Phys., 23, 5715–5733, https://doi.org/10.5194/acp-23-5715-2023, 2023
We observed a surprisingly similar set of oxidation product chemical formulas from limonene and α-pinene, including oligomers, formed under cool-flame (present experiments) and simulated atmospheric oxidation (literature). Data analysis indicated that a subset of chemical formulas is common to all experiments independently of experimental conditions. Also, this study indicates that many detected chemical formulas can be ascribed to an autooxidation reaction.
PubDate: Tue, 23 May 2023 01:21:16 +020
DOI: 10.5194/acp-23-5715-2023 2023
- Modelling wintertime sea-spray aerosols under Arctic haze conditions
Abstract: Modelling wintertime sea-spray aerosols under Arctic haze conditions
Eleftherios Ioannidis, Kathy S. Law, Jean-Christophe Raut, Louis Marelle, Tatsuo Onishi, Rachel M. Kirpes, Lucia M. Upchurch, Thomas Tuch, Alfred Wiedensohler, Andreas Massling, Henrik Skov, Patricia K. Quinn, and Kerri A. Pratt
Atmos. Chem. Phys., 23, 5641–5678, https://doi.org/10.5194/acp-23-5641-2023, 2023
Remote and local anthropogenic emissions contribute to wintertime Arctic haze, with enhanced aerosol concentrations, but natural sources, which also contribute, are less well studied. Here, modelled wintertime sea-spray aerosols are improved in WRF-Chem over the wider Arctic by including updated wind speed and temperature-dependent treatments. As a result, anthropogenic nitrate aerosols are also improved. Open leads are confirmed to be the main source of sea-spray aerosols over northern Alaska.
PubDate: Mon, 22 May 2023 01:21:16 +020
DOI: 10.5194/acp-23-5641-2023 2023
- A seasonal analysis of aerosol NO3− sources and NOx oxidation pathways
in the Southern Ocean marine boundary layer
Abstract: A seasonal analysis of aerosol NO3− sources and NOx oxidation pathways in the Southern Ocean marine boundary layer
Jessica M. Burger, Emily Joyce, Meredith G. Hastings, Kurt A. M. Spence, and Katye E. Altieri
Atmos. Chem. Phys., 23, 5605–5622, https://doi.org/10.5194/acp-23-5605-2023, 2023
A seasonal analysis of the nitrogen isotopes of atmospheric nitrate over the remote Southern Ocean reveals that similar natural NOx sources dominate in spring and summer, while winter is representative of background-level conditions. The oxygen isotopes suggest that similar oxidation pathways involving more ozone occur in spring and winter, while the hydroxyl radical is the main oxidant in summer. This work helps to constrain NOx cycling and oxidant budgets in a data-sparse remote marine region.
PubDate: Mon, 22 May 2023 01:21:16 +020
DOI: 10.5194/acp-23-5605-2023 2023
- HUB: a method to model and extract the distribution of ice nucleation
temperatures from drop-freezing experiments
Abstract: HUB: a method to model and extract the distribution of ice nucleation temperatures from drop-freezing experiments
Ingrid de Almeida Ribeiro, Konrad Meister, and Valeria Molinero
Atmos. Chem. Phys., 23, 5623–5639, https://doi.org/10.5194/acp-23-5623-2023, 2023
Ice formation is a key atmospheric process facilitated by a wide range of aerosols. We present a method to model and interpret ice nucleation experiments and extract the distribution of the potency of nucleation sites. We use the method to optimize the conditions of laboratory sampling and extract distributions of ice nucleation temperatures from bacteria, fungi, and pollen. These reveal unforeseen subpopulations of nuclei in these systems and how they respond to changes in their environment.
PubDate: Mon, 22 May 2023 01:21:16 +020
DOI: 10.5194/acp-23-5623-2023 2023
- Measurement Report: Wintertime new particle formation in the rural area of
the North China Plain – influencing factors and possible formation
mechanism
Abstract: Measurement Report: Wintertime new particle formation in the rural area of the North China Plain – influencing factors and possible formation mechanism
Juan Hong, Min Tang, Qiaoqiao Wang, Nan Ma, Shaowen Zhu, Shaobin Zhang, Xihao Pan, Linhong Xie, Guo Li, Uwe Kuhn, Chao Yan, Jiangchuan Tao, Ye Kuang, Yao He, Wanyun Xu, Runlong Cai, Yaqing Zhou, Zhibin Wang, Guangsheng Zhou, Bin Yuan, Yafang Cheng, and Hang Su
Atmos. Chem. Phys., 23, 5699–5713, https://doi.org/10.5194/acp-23-5699-2023, 2023
A comprehensive investigation of the characteristics of new particle formation (NPF) events was conducted at a rural site on the North China Plain (NCP), China, during the wintertime of 2018 by covering the particle number size distribution down to sub–3 nm. Potential mechanisms for NPF under the current environment were explored, followed by a further discussion on the factors governing the occurrence of NPF at this rural site compared with other regions (e.g., urban areas) in the NCP region.
PubDate: Mon, 22 May 2023 01:21:16 +020
DOI: 10.5194/acp-23-5699-2023 2023
- Impact of HO2 aerosol uptake on radical levels and O3 production during
summertime in Beijing
Abstract: Impact of HO2 aerosol uptake on radical levels and O3 production during summertime in Beijing
Joanna E. Dyson, Lisa K. Whalley, Eloise J. Slater, Robert Woodward-Massey, Chunxiang Ye, James D. Lee, Freya Squires, James R. Hopkins, Rachel E. Dunmore, Marvin Shaw, Jacqueline F. Hamilton, Alastair C. Lewis, Stephen D. Worrall, Asan Bacak, Archit Mehra, Thomas J. Bannan, Hugh Coe, Carl J. Percival, Bin Ouyang, C. Nicholas Hewitt, Roderic L. Jones, Leigh R. Crilley, Louisa J. Kramer, W. Joe F. Acton, William J. Bloss, Supattarachai Saksakulkrai, Jingsha Xu, Zongbo Shi, Roy M. Harrison, Simone Kotthaus, Sue Grimmond, Yele Sun, Weiqi Xu, Siyao Yue, Lianfang Wei, Pingqing Fu, Xinming Wang, Stephen R. Arnold, and Dwayne E. Heard
Atmos. Chem. Phys., 23, 5679–5697, https://doi.org/10.5194/acp-23-5679-2023, 2023
The hydroxyl (OH) and closely coupled hydroperoxyl (HO2) radicals are vital for their role in the removal of atmospheric pollutants. In less polluted regions, atmospheric models over-predict HO2 concentrations. In this modelling study, the impact of heterogeneous uptake of HO2 onto aerosol surfaces on radical concentrations and the ozone production regime in Beijing in the summertime is investigated, and the implications for emissions policies across China are considered.
PubDate: Mon, 22 May 2023 01:21:16 +020
DOI: 10.5194/acp-23-5679-2023 2023
- Comparison of dust optical depth from multi-sensor products and MONARCH
(Multiscale Online Non-hydrostatic AtmospheRe CHemistry) dust reanalysis
over North Africa, the Middle East, and Europe
Abstract: Comparison of dust optical depth from multi-sensor products and MONARCH (Multiscale Online Non-hydrostatic AtmospheRe CHemistry) dust reanalysis over North Africa, the Middle East, and Europe
Michail Mytilinaios, Sara Basart, Sergio Ciamprone, Juan Cuesta, Claudio Dema, Enza Di Tomaso, Paola Formenti, Antonis Gkikas, Oriol Jorba, Ralph Kahn, Carlos Pérez García-Pando, Serena Trippetta, and Lucia Mona
Atmos. Chem. Phys., 23, 5487–5516, https://doi.org/10.5194/acp-23-5487-2023, 2023
Multiscale Online Non-hydrostatic AtmospheRe CHemistry model (MONARCH) dust reanalysis provides a high-resolution 3D reconstruction of past dust conditions, allowing better quantification of climate and socioeconomic dust impacts. We assess the performance of the reanalysis needed to reproduce dust optical depth using dust-related products retrieved from satellite and ground-based observations and show that it reproduces the spatial distribution and seasonal variability of atmospheric dust well.
PubDate: Wed, 17 May 2023 00:28:18 +020
DOI: 10.5194/acp-23-5487-2023 2023
- Statistical analysis of observations of polar stratospheric clouds with a
lidar in Kiruna, northern Sweden
Abstract: Statistical analysis of observations of polar stratospheric clouds with a lidar in Kiruna, northern Sweden
Peter Voelger and Peter Dalin
Atmos. Chem. Phys., 23, 5551–5565, https://doi.org/10.5194/acp-23-5551-2023, 2023
We examined 11 winters of lidar measurements of polar stratospheric clouds (PSCs), performed in Kiruna, northern Sweden. We discriminated cases with and without mountain lee waves present. We found that under mountain-lee-wave conditions PSCs are on average at higher altitudes and are more likely to contain ice. Without such waves present, most PSCs consist of nitric acid.
PubDate: Wed, 17 May 2023 00:28:18 +020
DOI: 10.5194/acp-23-5551-2023 2023
- Measurement report: Rapid decline of aerosol absorption coefficient and
aerosol optical property effects on radiative forcing in an urban area of
Beijing from 2018 to 2021
Abstract: Measurement report: Rapid decline of aerosol absorption coefficient and aerosol optical property effects on radiative forcing in an urban area of Beijing from 2018 to 2021
Xinyao Hu, Junying Sun, Can Xia, Xiaojing Shen, Yangmei Zhang, Quan Liu, Zhaodong Liu, Sinan Zhang, Jialing Wang, Aoyuan Yu, Jiayuan Lu, Shuo Liu, and Xiaoye Zhang
Atmos. Chem. Phys., 23, 5517–5531, https://doi.org/10.5194/acp-23-5517-2023, 2023
The simultaneous measurements under dry conditions of aerosol optical properties were conducted at three wavelengths for PM1 and PM10 in urban Beijing from 2018 to 2021. Considerable reductions in aerosol absorption coefficient and increased single scattering albedo demonstrated that absorbing aerosols were more effectively controlled than scattering aerosols due to pollution control measures. The aerosol radiative effect and the transport's impact on aerosol optical properties were analysed.
PubDate: Wed, 17 May 2023 00:28:18 +020
DOI: 10.5194/acp-23-5517-2023 2023
- Chemical identification of new particle formation and growth precursors
through positive matrix factorization of ambient ion measurements
Abstract: Chemical identification of new particle formation and growth precursors through positive matrix factorization of ambient ion measurements
Daniel John Katz, Aroob Abdelhamid, Harald Stark, Manjula R. Canagaratna, Douglas R. Worsnop, and Eleanor C. Browne
Atmos. Chem. Phys., 23, 5567–5585, https://doi.org/10.5194/acp-23-5567-2023, 2023
Ambient ion chemical composition measurements provide insight into trace gases that are precursors for the formation and growth of new aerosol particles. We use a new data analysis approach to increase the chemical information from these measurements. We analyze results from an agricultural region, a little studied land use type that is ~41 % of global land use, and find that the composition of gases important for aerosol formation and growth differs significantly from that in other ecosystems.
PubDate: Wed, 17 May 2023 00:28:18 +020
DOI: 10.5194/acp-23-5567-2023 2023
- Significant contribution of inland ships to the total NOx emissions along
the Yangtze River
Abstract: Significant contribution of inland ships to the total NOx emissions along the Yangtze River
Xiumei Zhang, Ronald van der A, Jieying Ding, Xin Zhang, and Yan Yin
Atmos. Chem. Phys., 23, 5587–5604, https://doi.org/10.5194/acp-23-5587-2023, 2023
We compiled a ship emission inventory based on automatic identification system (AIS) signals in the Jiangsu section of the Yangtze River. This ship emission inventory was compared with Chinese bottom-up inventories and the satellite-derived emissions from TROPOMI. The result shows a consistent spatial distribution, with riverine cities having high NOx emissions. Inland ship emissions of NOx are shown to contribute at least 40 % to air pollution along the river.
PubDate: Wed, 17 May 2023 00:28:18 +020
DOI: 10.5194/acp-23-5587-2023 2023
- Snowpack nitrate photolysis drives the summertime atmospheric nitrous acid
(HONO) budget in coastal Antarctica
Abstract: Snowpack nitrate photolysis drives the summertime atmospheric nitrous acid (HONO) budget in coastal Antarctica
Amelia M. H. Bond, Markus M. Frey, Jan Kaiser, Jörg Kleffmann, Anna E. Jones, and Freya A. Squires
Atmos. Chem. Phys., 23, 5533–5550, https://doi.org/10.5194/acp-23-5533-2023, 2023
Atmospheric nitrous acid (HONO) amount fractions measured at Halley Research Station, Antarctica, were found to be low. Vertical fluxes of HONO from the snow were also measured and agree with the estimated HONO production rate from photolysis of snow nitrate. In a simple box model of HONO sources and sinks, there was good agreement between the measured flux and amount fraction. HONO was found to be an important OH radical source at Halley.
PubDate: Wed, 17 May 2023 00:28:18 +020
DOI: 10.5194/acp-23-5533-2023 2023
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