|
|
- Characterising the dynamic movement of thunderstorms using very low- and
low-frequency (VLF/LF) total lightning data over the Pearl River Delta
region
Abstract: Characterising the dynamic movement of thunderstorms using very low- and low-frequency (VLF/LF) total lightning data over the Pearl River Delta region
Si Cheng, Jianguo Wang, Li Cai, Mi Zhou, Rui Su, Yijun Huang, and Quanxin Li
Atmos. Chem. Phys., 22, 10045–10059, https://doi.org/10.5194/acp-22-10045-2022, 2022
This paper helps to improve the recognition of severe thunderstorms in advance by giving a general understanding of how long the storm lasts, how fast the cluster moves and how much area the storm affects via information about the kinematic features of thunderstorms, which are the duration, valid area, the velocity, the direction and the farthest distance, and ideally to establish a foundation for future research that may contribute to the development of a new or improved prediction paradigm.
PubDate: 2022-08-05T18:15:56+02:00
- Sulfuric acid in the Amazon basin: measurements and evaluation of existing
sulfuric acid proxies
Abstract: Sulfuric acid in the Amazon basin: measurements and evaluation of existing sulfuric acid proxies
Deanna C. Myers, Saewung Kim, Steven Sjostedt, Alex B. Guenther, Roger Seco, Oscar Vega Bustillos, Julio Tota, Rodrigo A. F. Souza, and James N. Smith
Atmos. Chem. Phys., 22, 10061–10076, https://doi.org/10.5194/acp-22-10061-2022, 2022
We present the first measurements of gas-phase sulfuric acid from the Amazon basin and evaluate the efficacy of existing sulfuric acid parameterizations in this understudied region. Sulfuric acid is produced during the daytime and nighttime, though current proxies underestimate nighttime production. These results illustrate the need for better parameterizations of sulfuric acid and its precursors that are informed by measurements across a broad range of locations.
PubDate: 2022-08-05T18:15:56+02:00
- Seasonal variation in oxygenated organic molecules in urban Beijing and
their contribution to secondary organic aerosol
Abstract: Seasonal variation in oxygenated organic molecules in urban Beijing and their contribution to secondary organic aerosol
Yishuo Guo, Chao Yan, Yuliang Liu, Xiaohui Qiao, Feixue Zheng, Ying Zhang, Ying Zhou, Chang Li, Xiaolong Fan, Zhuohui Lin, Zemin Feng, Yusheng Zhang, Penggang Zheng, Linhui Tian, Wei Nie, Zhe Wang, Dandan Huang, Kaspar R. Daellenbach, Lei Yao, Lubna Dada, Federico Bianchi, Jingkun Jiang, Yongchun Liu, Veli-Matti Kerminen, and Markku Kulmala
Atmos. Chem. Phys., 22, 10077–10097, https://doi.org/10.5194/acp-22-10077-2022, 2022
Gaseous oxygenated organic molecules (OOMs) are able to form atmospheric aerosols, which will impact on human health and climate change. Here, we find that OOMs in urban Beijing are dominated by anthropogenic sources, i.e. aromatic (29 %–41 %) and aliphatic (26 %–41 %) OOMs. They are also the main contributors to the condensational growth of secondary organic aerosols (SOAs). Therefore, the restriction on anthropogenic VOCs is crucial for the reduction of SOAs and haze formation.
PubDate: 2022-08-05T18:15:56+02:00
- Monitoring sudden stratospheric warmings under climate change based on
reanalysis data verified by radio occultation
Abstract: Monitoring sudden stratospheric warmings under climate change based on reanalysis data verified by radio occultation
Ying Li, Gottfried Kirchengast, Marc Schwaerz, and Yunbin Yuan
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2022-497,2022
Preprint under review for ACP (discussion: open, 0 comments)
We develop a new approach to monitor Sudden Stratospheric Warming (SSW) events since 1980 and develop a 42 years’ SSW events climatology. Detection and evaluation results suggest that the new method is robust for SSW monitoring. We also found an increase in the duration of SSW main-phase warmings by about 4 days over the three decades from the 1980s to the 2010s, raising the average duration from about 10 days to 14 days and the warming strength is also found increased.
PubDate: 2022-08-05T18:15:56+02:00
- Interactive Stratospheric Aerosol models response to different amount and
altitude of SO2 injections during the 1991 Pinatubo eruption
Abstract: Interactive Stratospheric Aerosol models response to different amount and altitude of SO2 injections during the 1991 Pinatubo eruption
Ilaria Quaglia, Claudia Timmreck, Ulrike Niemeier, Daniele Visioni, Giovanni Pitari, Christoph Brühl, Sandip Dhomse, Henning Franke, Anton Laakso, Graham Mann, Eugene Rozanov, and Timofei Sukhodolov
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2022-514,2022
Preprint under review for ACP (discussion: open, 0 comments)
The last very large explosive volcanic eruption we have measurements for is the eruption of Mount Pinatubo in 1991. It is therefore often used as a benchmark for climate models ability to reproduce these kind of events. Here, we compare available measurements with the results from multiple experiments conducted with climate models interactively simulating the aerosol cloud formation.
PubDate: 2022-08-05T18:15:56+02:00
- Survival probabilities of atmospheric particles: comparison based on
theory, cluster population simulations, and observations in Beijing
Abstract: Survival probabilities of atmospheric particles: comparison based on theory, cluster population simulations, and observations in Beijing
Santeri Tuovinen, Runlong Cai, Veli-Matti Kerminen, Markku Kulmala, Jingkun Jiang, Chao Yan, and Jenni Kontkanen
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2022-484,2022
Preprint under review for ACP (discussion: open, 0 comments)
We compare observed survival probabilities of atmospheric particles from Beijing, China to survival probabilities based on analytical formulae and model simulations. We find observed survival probabilities under polluted conditions at smaller sizes to be higher, while at larger sizes they are lower or similar, than theoretical survival probabilities. Uncertainties in condensation sink and growth rate are found unlikely to explain higher-than-predicted survival probabilities at smaller sizes.
PubDate: 2022-08-05T18:15:56+02:00
- Measurement report: Intensive biomass burning emissions and rapid nitrate
formation drive severe haze formation in Sichuan basin, China: insights
from aerosol mass spectrometry
Abstract: Measurement report: Intensive biomass burning emissions and rapid nitrate formation drive severe haze formation in Sichuan basin, China: insights from aerosol mass spectrometry
Zhier Bao, Xinyi Zhang, Qing Li, Jiawei Zhou, Guangming Shi, Li Zhou, Fumo Yang, Shaodong Xie, Dan Zhang, Chongzhi Zhai, Zhenliang Li, Chao Peng, and Yang Chen
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2022-477,2022
Preprint under review for ACP (discussion: open, 0 comments)
We characterised no-refractory fine particulate matter (PM2.5) during winter in Sichuan Basin (SCB), southwest China. The factors driving severe aerosol pollution were revealed, highlighting the importance of rapid nitrate formation and intensive biomass burning. Nitrate was primarily formed through gas-phase oxidation during daytime and aqueous-phase oxidation during nighttime. Controlling nitrate and biomass burning will benefit the mitigation of haze formation in SCB.
PubDate: 2022-08-05T18:15:56+02:00
- Important role of stratospheric injection height for the distribution and
radiative forcing of smoke aerosol from the 2019–2020 Australian
wildfires
Abstract: Important role of stratospheric injection height for the distribution and radiative forcing of smoke aerosol from the 2019–2020 Australian wildfires
Bernd Heinold, Holger Baars, Boris Barja, Matthew Christensen, Anne Kubin, Kevin Ohneiser, Kerstin Schepanski, Nick Schutgens, Fabian Senf, Roland Schrödner, Diego Villanueva, and Ina Tegen
Atmos. Chem. Phys., 22, 9969–9985, https://doi.org/10.5194/acp-22-9969-2022, 2022
The extreme 2019–2020 Australian wildfires produced massive smoke plumes lofted into the lower stratosphere by pyrocumulonimbus convection. Most climate models do not adequately simulate the injection height of such intense fires. By combining aerosol-climate modeling with prescribed pyroconvective smoke injection and lidar observations, this study shows the importance of the representation of the most extreme wildfire events for estimating the atmospheric energy budget.
PubDate: 2022-08-04T00:04:44+02:00
- PM10 variation, composition, and source analysis in Tuscany (Italy)
following the COVID-19 lockdown restrictions
Abstract: PM10 variation, composition, and source analysis in Tuscany (Italy) following the COVID-19 lockdown restrictions
Fabio Giardi, Silvia Nava, Giulia Calzolai, Giulia Pazzi, Massimo Chiari, Andrea Faggi, Bianca Patrizia Andreini, Chiara Collaveri, Elena Franchi, Guido Nincheri, Alessandra Amore, Silvia Becagli, Mirko Severi, Rita Traversi, and Franco Lucarelli
Atmos. Chem. Phys., 22, 9987–10005, https://doi.org/10.5194/acp-22-9987-2022, 2022
The restriction measures adopted to contain the COVID-19 virus offered a unique opportunity to study urban particulate emissions in the near absence of traffic, which is one of the main emission sources in the urban environment. However, the drastic decrease in this source of particulate matter during the months of national lockdown did not lead to an equal decrease in the total particulate load. This is due to the inverse behavior shown by different sources, especially secondary sources.
PubDate: 2022-08-04T00:04:44+02:00
- Vertical aerosol particle exchange in the marine boundary layer estimated
from helicopter-borne measurements in the Azores region
Abstract: Vertical aerosol particle exchange in the marine boundary layer estimated from helicopter-borne measurements in the Azores region
Janine Lückerath, Andreas Held, Holger Siebert, Michel Michalkow, and Birgit Wehner
Atmos. Chem. Phys., 22, 10007–10021, https://doi.org/10.5194/acp-22-10007-2022, 2022
Three different methods were applied to estimate the vertical aerosol particle flux in the marine boundary layer (MBL) and between the MBL and free troposphere. For the first time, aerosol fluxes derived from these three methods were estimated and compared using airborne aerosol measurements using data from the ACORES field campaign in the northeastern Atlantic Ocean in July 2017. The amount of fluxes was small and directed up and down for different cases, but the methods were applicable.
PubDate: 2022-08-04T00:04:44+02:00
- Secondary aerosol formation in marine Arctic environments: a model
measurement comparison at Ny-Ålesund
Abstract: Secondary aerosol formation in marine Arctic environments: a model measurement comparison at Ny-Ålesund
Carlton Xavier, Metin Baykara, Robin Wollesen de Jonge, Barbara Altstädter, Petri Clusius, Ville Vakkari, Roseline Thakur, Lisa Beck, Silvia Becagli, Mirko Severi, Rita Traversi, Radovan Krejci, Peter Tunved, Mauro Mazzola, Birgit Wehner, Mikko Sipilä, Markku Kulmala, Michael Boy, and Pontus Roldin
Atmos. Chem. Phys., 22, 10023–10043, https://doi.org/10.5194/acp-22-10023-2022, 2022
The focus of this work is to study and improve our understanding of processes involved in the formation and growth of new particles in a remote Arctic marine environment. We run the 1D model ADCHEM along air mass trajectories arriving at Ny-Ålesund in May 2018. The model finds that ion-mediated H2SO4–NH3 nucleation can explain the observed new particle formation at Ny-Ålesund. The growth of particles is driven via H2SO4 condensation and formation of methane sulfonic acid in the aqueous phase.
PubDate: 2022-08-04T00:04:44+02:00
- Using OCO-2 column CO2 retrievals to rapidly detect and estimate
biospheric surface carbon flux anomalies
Abstract: Using OCO-2 column CO2 retrievals to rapidly detect and estimate biospheric surface carbon flux anomalies
Andrew F. Feldman, Zhen Zhang, Yasuko Yoshida, Abhishek Chatterjee, and Benjamin Poulter
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2022-506,2022
Preprint under review for ACP (discussion: open, 0 comments)
We investigate the conditions under which satellite-retrieved column carbon dioxide concentrations directly hold information about surface carbon dioxide fluxes, without the use of inversion models. We show that OCO-2 column carbon dioxide retrievals, available with 1–3 month latency, can be used to directly detect and roughly estimate surface carbon dioxide fluxes in the biosphere. As such, these OCO-2 retrievals have value for rapidly monitoring extreme conditions in the terrestrial biosphere.
PubDate: 2022-08-04T00:04:44+02:00
- A global climatology of ice nucleating particles at cirrus conditions
derived from model simulations with EMAC-MADE3
Abstract: A global climatology of ice nucleating particles at cirrus conditions derived from model simulations with EMAC-MADE3
Christof Gerhard Beer, Johannes Hendricks, and Mattia Righi
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2022-529,2022
Preprint under review for ACP (discussion: open, 0 comments)
Ice nucleating aerosol particles (INPs) have important influences on cirrus clouds and the climate system. However, their global atmospheric distribution in the cirrus regime is still very uncertain. We present a global climatology of INPs at cirrus conditions derived from model simulations, considering the INP-types mineral dust, soot, crystalline ammonium sulfate and glassy organics. The comparison of respective INP concentrations indicates a large importance of ammonium sulfate particles.
PubDate: 2022-08-04T00:04:44+02:00
- Arctic spring and summertime aerosol optical depth baseline from long-term
observations and model reanalyses – Part 1: Climatology and trend
Abstract: Arctic spring and summertime aerosol optical depth baseline from long-term observations and model reanalyses – Part 1: Climatology and trend
Peng Xian, Jianglong Zhang, Norm T. O'Neill, Travis D. Toth, Blake Sorenson, Peter R. Colarco, Zak Kipling, Edward J. Hyer, James R. Campbell, Jeffrey S. Reid, and Keyvan Ranjbar
Atmos. Chem. Phys., 22, 9915–9947, https://doi.org/10.5194/acp-22-9915-2022, 2022
The study provides baseline Arctic spring and summertime aerosol optical depth climatology, trend, and extreme event statistics from 2003 to 2019 using a combination of aerosol reanalyses, remote sensing, and ground observations. Biomass burning smoke has an overwhelming contribution to black carbon (an efficient climate forcer) compared to anthropogenic sources. Burning's large interannual variability and increasing summer trend have important implications for the Arctic climate.
PubDate: 2022-08-03T00:04:44+02:00
- How can Brewer–Dobson circulation trends be estimated from changes in
stratospheric water vapour and methane'
Abstract: How can Brewer–Dobson circulation trends be estimated from changes in stratospheric water vapour and methane'
Liubov Poshyvailo-Strube, Rolf Müller, Stephan Fueglistaler, Michaela I. Hegglin, Johannes C. Laube, C. Michael Volk, and Felix Ploeger
Atmos. Chem. Phys., 22, 9895–9914, https://doi.org/10.5194/acp-22-9895-2022, 2022
Brewer–Dobson circulation (BDC) controls the composition of the stratosphere, which in turn affects radiation and climate. As the BDC cannot be measured directly, it is necessary to infer its strength and trends indirectly. In this study, we test in the model world different methods for estimating the mean age of air trends based on a combination of stratospheric water vapour and methane data. We also provide simple practical advice of a more reliable estimation of the mean age of air trends.
PubDate: 2022-08-03T00:04:44+02:00
- Functionality-based formation of secondary organic aerosol from m-xylene
photooxidation
Abstract: Functionality-based formation of secondary organic aerosol from m-xylene photooxidation
Yixin Li, Jiayun Zhao, Mario Gomez-Hernandez, Michael Lavallee, Natalie M. Johnson, and Renyi Zhang
Atmos. Chem. Phys., 22, 9843–9857, https://doi.org/10.5194/acp-22-9843-2022, 2022
Here we elucidate the production of COOs and their roles in SOA and brown carbon formation from m-xylene oxidation by simultaneously monitoring the evolution of gas-phase products and aerosol properties in an environmental chamber. A kinetic framework is developed to predict SOA production from the concentrations and uptake coefficients for COOs. This functionality-based approach reproduces SOA formation from m-xylene oxidation well and is applicable to VOC oxidation for other species.
PubDate: 2022-08-03T00:04:44+02:00
- Vertical structure of biomass burning aerosol transported over the
southeast Atlantic Ocean
Abstract: Vertical structure of biomass burning aerosol transported over the southeast Atlantic Ocean
Harshvardhan Harshvardhan, Richard Ferrare, Sharon Burton, Johnathan Hair, Chris Hostetler, David Harper, Anthony Cook, Marta Fenn, Amy Jo Scarino, Eduard Chemyakin, and Detlef Müller
Atmos. Chem. Phys., 22, 9859–9876, https://doi.org/10.5194/acp-22-9859-2022, 2022
The evolution of aerosol in biomass burning smoke plumes that travel over marine clouds off the Atlantic coast of central Africa was studied using measurements made by a lidar deployed on a high-altitude aircraft. The main finding was that the physical properties of aerosol do not change appreciably once the plume has left land and travels over the ocean over a timescale of 1 to 2 d. Almost all particles in the plume are of radius less than 1 micrometer and spherical in shape.
PubDate: 2022-08-03T00:04:44+02:00
- Emissions of organic compounds from western US wildfires and their
near-fire transformations
Abstract: Emissions of organic compounds from western US wildfires and their near-fire transformations
Yutong Liang, Christos Stamatis, Edward C. Fortner, Rebecca A. Wernis, Paul Van Rooy, Francesca Majluf, Tara I. Yacovitch, Conner Daube, Scott C. Herndon, Nathan M. Kreisberg, Kelley C. Barsanti, and Allen H. Goldstein
Atmos. Chem. Phys., 22, 9877–9893, https://doi.org/10.5194/acp-22-9877-2022, 2022
This article reports the measurements of organic compounds emitted from western US wildfires. We identified and quantified 240 particle-phase compounds and 72 gas-phase compounds emitted in wildfire and related the emissions to the modified combustion efficiency. Higher emissions of diterpenoids and monoterpenes were observed, likely due to distillation from unburned heated vegetation. Our results can benefit future source apportionment and modeling studies as well as exposure assessments.
PubDate: 2022-08-03T00:04:44+02:00
- Arctic spring and summertime aerosol optical depth baseline from long-term
observations and model reanalyses – Part 2: Statistics of extreme AOD
events, and implications for the impact of regional biomass burning
processes
Abstract: Arctic spring and summertime aerosol optical depth baseline from long-term observations and model reanalyses – Part 2: Statistics of extreme AOD events, and implications for the impact of regional biomass burning processes
Peng Xian, Jianglong Zhang, Norm T. O'Neill, Jeffrey S. Reid, Travis D. Toth, Blake Sorenson, Edward J. Hyer, James R. Campbell, and Keyvan Ranjbar
Atmos. Chem. Phys., 22, 9949–9967, https://doi.org/10.5194/acp-22-9949-2022, 2022
The study provides a baseline Arctic spring and summertime aerosol optical depth climatology, trend, and extreme event statistics from 2003 to 2019 using a combination of aerosol reanalyses, remote sensing, and ground observations. Biomass burning smoke has an overwhelming contribution to black carbon (an efficient climate forcer) compared to anthropogenic sources. Burning's large interannual variability and increasing summer trend have important implications for the Arctic climate.
PubDate: 2022-08-03T00:04:44+02:00
- Chemical composition of secondary organic aerosol particles formed from
mixtures of anthropogenic and biogenic precursors
Abstract: Chemical composition of secondary organic aerosol particles formed from mixtures of anthropogenic and biogenic precursors
Yunqi Shao, Aristeidis Voliotis, Mao Du, Yu Wang, Kelly Pereira, Jacqueline Hamilton, M. Rami Alfarra, and Gordon McFiggans
Atmos. Chem. Phys., 22, 9799–9826, https://doi.org/10.5194/acp-22-9799-2022, 2022
This study explored the chemical properties of secondary organic aerosol (SOA) that formed from photo-oxidation of single and mixed biogenic and anthropogenic precursors. We showed that SOA chemical properties in a mixed vapour system are mainly affected by the higher-yield precursor's oxidation products and products from cross-product formation. This study also identifies potential tracer compounds in a mixed vapour system that might be used in SOA source attribution in future ambient studies.
PubDate: 2022-08-02T00:04:44+02:00
|
Open Access journal
