|
|
- Oceanic emissions of dimethyl sulfide and methanethiol and their
contribution to sulfur dioxide production in the marine atmosphere
Abstract: Oceanic emissions of dimethyl sulfide and methanethiol and their contribution to sulfur dioxide production in the marine atmosphere
Gordon A. Novak, Delaney B. Kilgour, Christopher M. Jernigan, Michael P. Vermeuel, and Timothy H. Bertram
Atmos. Chem. Phys., 22, 6309–6325, https://doi.org/10.5194/acp-22-6309-2022, 2022
We describe field measurements of the mixing ratio and oceanic emission flux of dimethyl sulfide (DMS) and methanethiol (MeSH) from a coastal ocean site. DMS is known to impact aerosol formation and growth in the marine atmosphere, influencing cloud formation and climate. Measurements of MeSH, which is produced by the same oceanic source as DMS, are rare. We show that MeSH emissions are large and must be measured alongside DMS to understand marine sulfur chemistry and aerosol formation.
PubDate: Tue, 17 May 2022 10:28:17 +020
DOI: 10.5194/acp-22-6309-2022 2022
- An investigation into the chemistry of HONO in the marine boundary layer
at Tudor Hill Marine Atmospheric Observatory in Bermuda
Abstract: An investigation into the chemistry of HONO in the marine boundary layer at Tudor Hill Marine Atmospheric Observatory in Bermuda
Yuting Zhu, Youfeng Wang, Xianliang Zhou, Yasin F. Elshorbany, Chunxiang Ye, Matthew Hayden, and Andrew J. Peters
Atmos. Chem. Phys., 22, 6327–6346, https://doi.org/10.5194/acp-22-6327-2022, 2022
The daytime chemistry of nitrous acid (HONO), which plays an important role in the oxidation capacity of the troposphere, is not well understood. In this work, we report new field measurement results of HONO and the relevant parameters in the marine boundary layer at Tudor Hill Marine Atmospheric Observatory in Bermuda. We evaluate the daytime HONO budgets in air masses under different types of interaction with the island and examine the strengths of different HONO formation and loss mechanisms.
PubDate: Tue, 17 May 2022 10:28:17 +020
DOI: 10.5194/acp-22-6327-2022 2022
- Arctic tropospheric ozone: assessment of current knowledge and model
performance
Abstract: Arctic tropospheric ozone: assessment of current knowledge and model performance
Cynthia H. Whaley, Kathy S. Law, Jens Liengaard Hjorth, Henrik Skov, Stephen R. Arnold, Joakim Langner, Jakob Boyd Pernov, Rong-You Chien, Jesper H. Christensen, Makoto Deushi, Xinyi Dong, Gregory Faluvegi, Mark Flanner, Joshua S. Fu, Michael Gauss, Ulas Im, Louis Marelle, Tatsuo Onishi, Naga Oshima, David A. Plummer, Luca Pozzoli, Jean-Christophe Raut, Ragnhild Skeie, Manu A. Thomas, Kostas Tsigaridis, Svetlana Tsyro, Steven T. Turnock, Knut von Salzen, and David W. Tarasick
Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2022-319,2022
Preprint under review for ACP (discussion: open, 0 comments)
This study summarizes recent research on ozone in the Arctic, a sensitive and rapidly warming region. We find that the seasonal cycles of near-surface atmospheric ozone is variable depending on whether near the coast or in-land. Several global model simulations were evaluated and we found that because models lack some of the ozone chemistry that is important for the coastal Arctic locations, they do not accurate simulate ozone there.
PubDate: Tue, 17 May 2022 10:28:17 +020
DOI: 10.5194/acp-2022-3192022
- Seasonal characteristics of atmospheric formaldehyde (HCHO) in a coastal
city of southeast China: Formation mechanism and photochemical effects
Abstract: Seasonal characteristics of atmospheric formaldehyde (HCHO) in a coastal city of southeast China: Formation mechanism and photochemical effects
Taotao Liu, Yiling Lin, Jinsheng Chen, Gaojie Chen, Chen Yang, Lingling Xu, Mengren Li, Xiaolong Fan, Yanting Chen, Liqian Yin, Yuping Chen, Xiaoting Ji, Ziyi Lin, Fuwang Zhang, Hong Wang, and Youwei Hong
Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2022-292,2022
Preprint under review for ACP (discussion: open, 0 comments)
Field observations and models analysis were carried out in a coastal city to study HCHO formation mechanism and its impacts on photochemistry. HCHO contributed to atmospheric oxidation by around 10 %, reflecting its significance in photochemistry. Disabling HCHO mechanism made net O3 production rates decrease by 31 %, which were dominated by the reductions of pathways relating to radical reactions, indicating the HCHO affected O3 mainly by controlling the efficiencies of radical propagation.
PubDate: Tue, 17 May 2022 10:28:17 +020
DOI: 10.5194/acp-2022-2922022
- Four-dimensional Variational Assimilation for SO2 Emission and its
Application around the COVID-19 lockdown in the spring 2020 over China
Abstract: Four-dimensional Variational Assimilation for SO2 Emission and its Application around the COVID-19 lockdown in the spring 2020 over China
Yiwen Hu, Zengliang Zang, Xiaoyan Ma, Yi Li, Yanfei Liang, Wei You, Xiaobin Pan, and Zhijin Li
Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2022-301,2022
Preprint under review for ACP (discussion: open, 0 comments)
This study developed a four-dimensional variational assimilation (4DVAR) system based on WRF-Chem to optimize SO2 emissions. The system was applied to investigate the changes in SO2 emission in China during the COVID-19 lockdown, with special focus on Central China, by assimilating surface hourly SO2 observations. The results showed that the 4DVAR system can effectively optimize the emissions to describe the actual change in SO2 emissions during special events and improve the forecast skill.
PubDate: Tue, 17 May 2022 10:28:17 +020
DOI: 10.5194/acp-2022-3012022
- Trends in secondary inorganic aerosol pollution in China and its responses
to emission controls of precursors in wintertime
Abstract: Trends in secondary inorganic aerosol pollution in China and its responses to emission controls of precursors in wintertime
Fanlei Meng, Yibo Zhang, Jiahui Kang, Mathew R. Heal, Stefan Reis, Mengru Wang, Lei Liu, Kai Wang, Shaocai Yu, Pengfei Li, Jing Wei, Yong Hou, Ying Zhang, Xuejun Liu, Zhenling Cui, Wen Xu, and Fusuo Zhang
Atmos. Chem. Phys., 22, 6291–6308, https://doi.org/10.5194/acp-22-6291-2022, 2022
PM2.5 pollution is a pressing environmental issue threatening human health and food security globally. We combined a meta-analysis of nationwide measurements and air quality modeling to identify efficiency gains by striking a balance between controlling NH3 and acid gas emissions. Persistent secondary inorganic aerosol pollution in China is limited by acid gas emissions, while an additional control on NH3 emissions would become more important as reductions in SO2 and NOx emissions progress.
PubDate: Mon, 16 May 2022 10:28:17 +020
DOI: 10.5194/acp-22-6291-2022 2022
- A process-oriented evaluation of CAMS reanalysis ozone during tropopause
folds over Europe for the period 2003–2018
Abstract: A process-oriented evaluation of CAMS reanalysis ozone during tropopause folds over Europe for the period 2003–2018
Dimitris Akritidis, Andrea Pozzer, Johannes Flemming, Antje Inness, Philippe Nédélec, and Prodromos Zanis
Atmos. Chem. Phys., 22, 6275–6289, https://doi.org/10.5194/acp-22-6275-2022, 2022
We perform a process-oriented evaluation of Copernicus Atmosphere Monitoring Service (CAMS) reanalysis (CAMSRA) O3 over Europe using WOUDC (World Ozone and Ultraviolet Radiation Data Centre) ozonesondes and IAGOS (In-service Aircraft for a Global Observing System) aircraft measurements. Chemical data assimilation assists CAMSRA to reproduce the observed O3 increases in the troposphere during the examined folding events, but it mostly results in O3 overestimation in the upper troposphere.
PubDate: Mon, 16 May 2022 10:28:17 +020
DOI: 10.5194/acp-22-6275-2022 2022
- Interannual variability of winds in the Antarctic mesosphere and lower
thermosphere over Rothera (67° S, 68° W) in radar observations and
WACCM-X
Abstract: Interannual variability of winds in the Antarctic mesosphere and lower thermosphere over Rothera (67° S, 68° W) in radar observations and WACCM-X
Phoebe Noble, Neil Hindley, Corwin Wright, Chihoko Cullens, Scott England, Nicholas Pedatella, Nicholas Mitchell, and Tracy Moffat-Griffin
Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2022-150,2022
Preprint under review for ACP (discussion: open, 0 comments)
We use long term radar data and the WACCM-X model to study the impact of dynamical phenomena, including the 11-year solar cycle, ENSO, QBO and SAM, on Antarctic mesospheric winds. We find that in summer, the zonal wind (both observationally and in the model) is strongly correlated with the solar cycle. We also see important differences in the results from the other processes. In addition we find important and large biases in the winter model zonal winds relative to the observations.
PubDate: Mon, 16 May 2022 10:28:17 +020
DOI: 10.5194/acp-2022-1502022
- Mapping the dependence of BC radiative forcing on emission region and
season
Abstract: Mapping the dependence of BC radiative forcing on emission region and season
Petri Räisänen, Joonas Merikanto, Risto Makkonen, Mikko Savolahti, Alf Kirkevåg, Maria Sand, Øyvind Seland, and Antti-Ilari Partanen
Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2022-288,2022
Preprint under review for ACP (discussion: open, 0 comments)
A climate model is used to evaluate how the radiative forcing (RF) associated with black carbon (BC) emissions depends on the latitude, longitude and seasonality of emissions. It is found that both the direct RF (BC absorption of solar radiation in air) and snow RF (BC absorption in snow/ice) depend strongly on the emission region and season. The results suggest that for a given mass of BC emitted, climatic impacts are likely to be largest for high-latitude emissions due to their large snow RF.
PubDate: Mon, 16 May 2022 10:28:17 +020
DOI: 10.5194/acp-2022-2882022
- Ozone depletion events in the Arctic spring of 2019: A new modeling
approach to bromine emissions
Abstract: Ozone depletion events in the Arctic spring of 2019: A new modeling approach to bromine emissions
Maximilian Herrmann, Moritz Schöne, Christian Borger, Simon Warnach, Thomas Wagner, Ulrich Platt, and Eva Gutheil
Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2022-334,2022
Preprint under review for ACP (discussion: open, 0 comments)
Ozone depletion events (ODEs) are a common occurence in the boundary layer during Arctic spring. Ozone is depleted by bromine species in an auto-catalytic reaction cycle. Previous modeling studies assumed an infinite bromine source at the ground. An alternative emission scheme is presented in which a finite amount of bromide in the snow is tracked over time. The Weather Research and Forecasting model coupled with Chemistry (WRF-Chem) is used to study ODEs in the Arctic from February to May 2019.
PubDate: Mon, 16 May 2022 10:28:17 +020
DOI: 10.5194/acp-2022-3342022
- New particle formation in coastal New Zealand with a focus on open-ocean
air masses
Abstract: New particle formation in coastal New Zealand with a focus on open-ocean air masses
Maija Peltola, Clémence Rose, Jonathan V. Trueblood, Sally Gray, Mike Harvey, and Karine Sellegri
Atmos. Chem. Phys., 22, 6231–6254, https://doi.org/10.5194/acp-22-6231-2022, 2022
Despite the importance of marine aerosol measurements for constraining climate models, these measurements are scarce. We measured the aerosol particle number size distribution in coastal New Zealand over a total period of 10 months. This paper analyses the aerosol properties at the site, with a special focus on new particle formation and marine air masses. New particle formation was observed frequently, but in marine air masses it did not follow traditional event criteria.
PubDate: Fri, 13 May 2022 05:49:37 +020
DOI: 10.5194/acp-22-6231-2022 2022
- Measurement report: Source apportionment of carbonaceous aerosol using
dual-carbon isotopes (13C and 14C) and levoglucosan in three northern
Chinese cities during 2018–2019
Abstract: Measurement report: Source apportionment of carbonaceous aerosol using dual-carbon isotopes (13C and 14C) and levoglucosan in three northern Chinese cities during 2018–2019
Huiyizhe Zhao, Zhenchuan Niu, Weijian Zhou, Sen Wang, Xue Feng, Shugang Wu, Xuefeng Lu, and Hua Du
Atmos. Chem. Phys., 22, 6255–6274, https://doi.org/10.5194/acp-22-6255-2022, 2022
In this study, we investigated the characteristics and changes in the sources of carbonaceous aerosols in northern Chinese cities using dual-carbon isotopes (13C and 14C) and levoglucosan during 2018 to 2019 and compared them with the research in previous decades. The results show that the contribution of fossil sources has decreased (6–16%) significantly, and non-fossil sources have become the main part of carbonaceous aerosols, which verified the effectiveness of air quality management.
PubDate: Fri, 13 May 2022 05:49:37 +020
DOI: 10.5194/acp-22-6255-2022 2022
- Measurement report: Vertical profiling of particle size distributions over
Lhasa, Tibet – tethered balloon-based in situ measurements and source
apportionment
Abstract: Measurement report: Vertical profiling of particle size distributions over Lhasa, Tibet – tethered balloon-based in situ measurements and source apportionment
Liang Ran, Zhaoze Deng, Yunfei Wu, Jiwei Li, Zhixuan Bai, Ye Lu, Deqing Zhuoga, and Jianchun Bian
Atmos. Chem. Phys., 22, 6217–6229, https://doi.org/10.5194/acp-22-6217-2022, 2022
The Tibetan Plateau (TP), the highest plateau in the world, plays a crucial role in regional and global climate. To examine the fingerprint left by human activities on the originally remote atmosphere, size distributions of particles from the ground to about 800 m were measured for the first time in summer 2020 in Lhasa, one of a few urbanized cities on TP. Potential sources of particles at different heights were explored. The contribution of emissions from religious activities was highlighted.
PubDate: Fri, 13 May 2022 05:49:37 +020
DOI: 10.5194/acp-22-6217-2022 2022
- Emission factors and evolution of SO2 measured from biomass burning in
wild and agricultural fires
Abstract: Emission factors and evolution of SO2 measured from biomass burning in wild and agricultural fires
Pamela Rickly, Hongyu Guo, Pedro Campuzano-Jost, Jose L. Jimenez, Glenn M. Wolfe, Ryan Bennett, Ilann Bourgeois, John D. Crounse, Jack E. Dibb, Joshua P. DiGangi, Glenn S. Diskin, Maximilian Dollner, Emily M. Gargulinski, Samuel R. Hall, Hannah S. Halliday, Thomas F. Hanisco, Reem A. Hannun, Jin Liao, Richard Moore, Benjamin A. Nault, John B. Nowak, Claire E. Robinson, Thomas Ryerson, Kevin J. Sanchez, Manuel Schöberl, Amber J. Soja, Jason M. St. Clair, Kenneth L. Thornhill, Kirk Ullmann, Paul O. Wennberg, Bernadett Weinzierl, Elizabeth B. Wiggins, Edward L. Winstead, and Andrew W. Rollins
Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2022-309,2022
Preprint under review for ACP (discussion: open, 0 comments)
Biomass burning sulfur dioxide (SO2) emission factors range from 0.27–1.1 g kg-1 C. Biomass burning SO2 can quickly form sulfate and organosulfur, but these pathways are dependent on liquid water content and pH. Hydroxymethanesulfonate (HMS) appears to be directly emitted from some fire sources, but is not the sole contributor to the organosulfur signal. It is shown that HMS and organosulfur chemistry may be an important S(IV) reservoir with the fate dependent on the surrounding conditions.
PubDate: Fri, 13 May 2022 05:49:37 +020
DOI: 10.5194/acp-2022-3092022
- Technical note: Identification and quantification of gaseous and
particulate organic compounds from cooking fumes by comprehensive
two-dimensional gas chromatography-mass spectrometry
Abstract: Technical note: Identification and quantification of gaseous and particulate organic compounds from cooking fumes by comprehensive two-dimensional gas chromatography-mass spectrometry
Yuanzheng Gong, Kai Song, Song Guo, Daqi Lv, Yuan Zhang, Zichao Wan, Wenfei Zhu, Hui Wang, Ying Yu, Rui Tan, Ruizhe Shen, Sihua Lu, Shuangde Li, and Yunfa Chen
Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2022-326,2022
Preprint under review for ACP (discussion: open, 0 comments)
Herein we applied thermal desorption comprehensive two-dimensional gas chromatography-mass spectrometer (TD-GCxGC-MS) for synchronous analysis of gaseous and particulate organics emitted from cooking fumes. With a systematic 4-step qualitative procedure and precise quantitative and semi-quantitative method, 170 and 352 compounds from C2 (acetic acids) – C30 (squalene) occupying 95 % and 90 % of the total ion current for gaseous and particulate samples were identified and quantified.
PubDate: Fri, 13 May 2022 05:49:37 +020
DOI: 10.5194/acp-2022-3262022
- The effect of ash, water vapor, and heterogeneous chemistry on the
evolution of a Pinatubo-size volcanic cloud
Abstract: The effect of ash, water vapor, and heterogeneous chemistry on the evolution of a Pinatubo-size volcanic cloud
Mohamed Abdelkader, Georgiy Stenchikov, Andrea Pozzer, Holger Tost, and Jos Lelieveld
Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2022-177,2022
Preprint under review for ACP (discussion: open, 0 comments)
We study the effect of injected volcanic ash, water vapor, and SO2 on the development of the volcanic cloud and the stratospheric aerosol optical depth (AOD). Both are sensitive to the initial injection height and to the aging of the volcanic ash shaped by heterogeneous chemistry coupled with the ozone cycle. The manuscript explains the large differences in AOD for different injection scenarios which could improve the estimate of the radiative forcing of volcanic eruptions.
PubDate: Fri, 13 May 2022 05:49:37 +020
DOI: 10.5194/acp-2022-1772022
- Inverse modeling of Chinese NOx emissions using deep learning: Integrating
in situ observations with a satellite-based chemical reanalysis
Abstract: Inverse modeling of Chinese NOx emissions using deep learning: Integrating in situ observations with a satellite-based chemical reanalysis
Tai-Long He, Dylan B. A. Jones, Kazuyuki Miyazaki, Kevin W. Bowman, Zhe Jiang, Xiaokang Chen, Rui Li, Yuxiang Zhang, and Kunna Li
Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2022-251,2022
Preprint under review for ACP (discussion: open, 0 comments)
We use a deep learning (DL) model to estimate Chinese NOx emissions by combining satellite analysis and in situ measuremements. Our results are consistent with conventional analyses of Chinese NOx emissions. Comparison with mobility data shows that the DL model has a better capability to capture changes in NOx. We analyze Chinese NOx emissions during the COVID-19 pandemic period. Our results illustrate the potential utility of DL as a complementary tool for conventional air quality studies.
PubDate: Thu, 12 May 2022 05:49:37 +020
DOI: 10.5194/acp-2022-2512022
- Source Apportionment and Evolution of N-containing Aerosols at a Rural
Cloud Forest in Taiwan by Isotope Analysis
Abstract: Source Apportionment and Evolution of N-containing Aerosols at a Rural Cloud Forest in Taiwan by Isotope Analysis
Ting-Yu Chen, Chia-Li Chen, Yi-Chi Chen, Charles C.-K. Chou, Haojia Ren, and Hui-Ming Hung
Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2022-30,2022
Preprint under review for ACP (discussion: open, 0 comments)
The anthropogenic influence on aerosol composition in a downstream river-valley forest was investigated using FT-IR and isotope analysis. A higher N-containing species concentration during daytime fog events indicates that a stronger inversion leads to higher pollutant concentrations, and the fog enhances the aqueous-phase chemical processes. Moreover, the observed size-dependent oxygen isotope suggests the contribution of organic peroxyl radicals to local nitrate formation for small particles.
PubDate: Thu, 12 May 2022 05:49:37 +020
DOI: 10.5194/acp-2022-302022
- On the global relationship between polarimetric radio occultation
observable ΔΦ and ice water content
Abstract: On the global relationship between polarimetric radio occultation observable ΔΦ and ice water content
Ramon Padullés, Estel Cardellach, and F. Joseph Turk
Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2022-300,2022
Preprint under review for ACP (discussion: open, 0 comments)
The results of comparing the polarimetric radio occultation observable ΔΦ and the ice water content derived from the Cloudsat radar, in a global and statistical way, show a strong correlation between the geographical patterns of both quantities for a wide range of heights. This implies that horizontally oriented hydrometeors are systematically present through the whole globe and through all vertical levels, which could provide insights on the physical processes leading to precipitation.
PubDate: Thu, 12 May 2022 05:49:37 +020
DOI: 10.5194/acp-2022-3002022
- Seasonal Significance of New Particle Formation Impacts on Cloud
Condensation Nuclei at a Mountaintop Location
Abstract: Seasonal Significance of New Particle Formation Impacts on Cloud Condensation Nuclei at a Mountaintop Location
Noah S. Hirshorn, Lauren M. Zuromski, Christopher Rapp, Ian McCubbin, Fangqun Yu, and A. Gannet Hallar
Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2022-338,2022
Preprint under review for ACP (discussion: open, 0 comments)
New particle formation (NPF) is a source of atmospheric aerosol number concentration that can impact climate by growing to larger sizes and under proper conditions, forming cloud condensation nuclei (CCN). Using novel methods, we find that at Storm Peak Laboratory, a remote mountaintop site in Colorado, NPF is observed to enhance CCN concentrations in the spring by a factor of 1.54 and in the winter by a factor of 1.36 which can occur on a regional scale having important climate implications.
PubDate: Thu, 12 May 2022 05:49:37 +020
DOI: 10.5194/acp-2022-3382022
|
Open Access journal
