Simulation of the Steady Mixing State of Black Carbon With a Two‐Dimensional Sectional Model DOI Creative Commons
Qichang Lin, Jiandong Wang, Chenxi Li

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2024, Volume and Issue: 129(23)

Published: Dec. 9, 2024

Abstract Black carbon (BC) strongly absorbs solar radiation and has a warming effect on the earth‐atmosphere system. BC experiences continuous aging, making its optical properties great uncertainty due to complex mixing state. To address this issue, we developed sectional model which is capable of tracking both aerosol size core size. This was applied simulate aging process. The atmospheric observational data from slightly polluted case employed drive model. It shown that BC's characteristics tend reach steady state within 12 hr. Our analysis reveals that, in state, distribution BC‐containing particles demonstrates notable characteristic: particle decreases exponentially as increases. exponential relationship provides simplified yet accurate representation steady‐state validated across diverse conditions.

Language: Английский

Particulate black carbon mass concentrations and the episodic source identification driven by atmospheric blocking effects in Astana, Kazakhstan DOI Creative Commons
Gulden Ormanova, Philip K. Hopke,

Ali Darvishi Omrani

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 939, P. 173581 - 173581

Published: May 27, 2024

Black carbon (BC) is a component of fine particulate matter (PM

Language: Английский

Citations

5
Strong reduction in near-surface turbulence due to aerosols in South and East Asia DOI Creative Commons
Øivind Hodnebrog, Kristin Aunan, Sourangsu Chowdhury

et al.

Published: April 30, 2025

Abstract Absorbing and scattering aerosols influence the vertical temperature profile can lead to a shallower boundary layer potentially enhanced surface air pollution. Using regional chemistry-climate model validated against >1000 quality monitoring stations, we show that absorbing black carbon (BC) reduce near-surface turbulence height through aerosol-radiation interactions (ARI). While ARI due total PM 2.5 concentrations 25,000–27,000 annual excess deaths in each of Northern India Eastern China, BC have modest impact on because its ability for self-lofting precipitation affecting wet scavenging. However, over India, strongly increase number days with combined high relative humidity, which is dangerous human health. These results highlight multitude indirect impacts from individual aerosol species need be considered achieve efficient mitigation

Language: Английский

Citations

0
Low‐Level Urban Anthropogenic Sources Contribute to Strong Aerosol Light Absorption on the South African Highveld DOI Creative Commons
Clarissa Baldo, Brigitte Language, Tommaso Isolabella

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2025, Volume and Issue: 130(10)

Published: May 22, 2025

Abstract This study investigated the chemical composition and shortwave absorption coefficient, β abs ( λ ), of aerosols collected from sites on Highveld, a major industrial highly polluted region South Africa. Local anthropogenic mineral dust was found to be dominant component, accounting for (53 ± 14)% aerosol mass concentrations. Carbonaceous (34 12)%, mainly domestic waste biomass burning, secondary inorganic (13 6%) combustion sources were also found. High ) observed at all sites, with an estimated efficiency, MAE( (1,296 472) 10 −3 m 2 g −1 375 nm (621 239)10 850 nm. The contributions primary light‐absorbing determined using tracers two optical clusters identified based MAE black carbon (BC). BC contributor wavelengths (>60%). brown contribution decreased (8–40) % (1–23) 532 nm, higher in Cluster 1 than 2. Anthropogenic appeared more light absorbing pure desert significant constant wavelength ∼16%. levels have implications radiation budget atmospheric stability. Although dominates African contributes significantly concentrations enhanced light‐absorption.

Language: Английский

Citations

0
Deep-learning-derived planetary boundary layer height from conventional meteorological measurements DOI Creative Commons
Tianning Su, Yunyan Zhang

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(11), P. 6477 - 6493

Published: June 4, 2024

Abstract. The planetary boundary layer (PBL) height (PBLH) is an important parameter for various meteorological and climate studies. This study presents a multi-structure deep neural network (DNN) model, which can estimate PBLH by integrating the morning temperature profiles surface observations. DNN model developed leveraging rich dataset of derived from long-standing radiosonde records augmented with high-resolution micro-pulse lidar Doppler We access performance ensemble 10 members, each featuring distinct hidden-layer structures, collectively yield robust 27-year over southern Great Plains 1994 to 2020. influence factors on rigorously analyzed through importance test. Moreover, model's accuracy evaluated against observations juxtaposed conventional remote sensing methodologies, including lidar, ceilometer, Raman lidar. exhibits reliable across diverse conditions demonstrates lower biases relative methods. In addition, originally trained plain region, remarkable adaptability when applied heterogeneous terrains climates encountered during GoAmazon (Green Ocean Amazon; tropical rainforest) CACTI (Cloud, Aerosol, Complex Terrain Interactions; middle-latitude mountain) campaigns. These findings demonstrate effectiveness learning models in estimating PBLH, enhancing our understanding processes implications improving representation PBL weather forecasting modeling.

Language: Английский

Citations

3
Source apportionment and wet scavenging ability of atmospheric black carbon during haze in Northeast China DOI
Shuo Ding, Delong Zhao, Ping Tian

et al.

Environmental Pollution, Journal Year: 2024, Volume and Issue: 357, P. 124470 - 124470

Published: June 29, 2024

Language: Английский

Citations

3
Changes in the Direct Climate Effect of Black Carbon Aerosols in East Asia Under the “Dual Carbon” Goal of China DOI
Peng Gao, Yiman Gao,

Yinan Zhou

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2024, Volume and Issue: 129(14)

Published: July 23, 2024

Abstract In the context of China's “dual carbon” goal, emissions air pollutants are expected to significantly decrease in future. Thus, direct climate effects black carbon (BC) aerosols East Asia investigated under this goal using an updated regional and chemistry model. The simulated annual average BC concentration over is approximately 1.29 μg/m 3 last decade. Compared those 2010–2020, both column burden instantaneous radiative forcing by more than 55% 80%, respectively, peak year (2030s) neutrality (2060s). Conversely, effective (ERF) responses exhibit substantial nonlinearity emission reduction, possibly resulting from different adjustments thermal‐dynamic fields clouds BC‐radiation interactions. mean ERF at tropopause +1.11 W/m 2 2010–2020 while negative 2060s. interactions present‐day impose a significant cooling −0.2 −0.5 K central China but warming +0.3 Tibetan Plateau. As decline, surface temperature show mixed picture compared with eastern Tibet −0.3 2030s, Indian might play important role Asian reduction China.

Language: Английский

Citations

3
Intensification of Mid‐Latitude Cyclone by Aerosol‐Radiation Interaction Increases Transport of Canadian Wildfire Smoke to Northeastern US DOI Creative Commons
Zilin Wang, Xin Huang, Lian Xue

et al.

Geophysical Research Letters, Journal Year: 2024, Volume and Issue: 51(13)

Published: June 27, 2024

Abstract Wildfires have long been regarded as one chief culprit in regional air pollution, and pose great impacts on climate change. Although forcing of wildfire smoke has widely investigated, its influence synoptic systems remains unclear. Based measurement modeling analysis, the impact development a mid‐latitude cyclone was revealed for Canadian wildfires early June 2023. The radiative induced by at surface atmosphere reached up to −150 100 W m −2 , posing opposite tendencies atmospheric stratification over land ocean. Such perturbations contributed enhancement stagnation cyclone, which favored transport from fire‐intensive region, indicated nearly 40% increment PM 2.5 mass flux. With escalating risk future, inclusion aerosols' meteorology weather forecast models is importance.

Language: Английский

Citations

2
Study on visibility forecast optimization based on aerosol- meteorological feedbacks in wet conditions DOI
Xin Zhang, Yue Wang,

Chengduo Yuan

et al.

Urban Climate, Journal Year: 2024, Volume and Issue: 55, P. 101951 - 101951

Published: May 1, 2024

Language: Английский

Citations

2
Quantitative Decoupling Analysis for Assessing the Meteorological, Emission, and Chemical Influences on Fine Particle Pollution DOI Creative Commons
Junhua Wang, Baozhu Ge, Lei Kong

et al.

Journal of Advances in Modeling Earth Systems, Journal Year: 2024, Volume and Issue: 16(11)

Published: Nov. 1, 2024

Abstract A comprehensive understanding of meteorological, emission and chemical influences on severe haze is essential for air pollution mitigation. However, the nonlinearity atmospheric system greatly hinders this understanding. In study, we developed quantitative decoupling analysis (QDA) method by applying Factor Separation (FS) into model processes to quantify effects emissions (E), meteorology (M), reactions (C), their nonlinear interactions impact fine particulate matter (PM 2.5 ) pollution. Taking a heavy‐haze episode in Beijing as an example, show that different from integrated process rate (IPR) scenario approach (SAA) previous studies, QDA explicitly demonstrate decomposing variation PM concentration individual contributions E , M C terms well among these processes. Results showed dominated hourly fluctuation concentration. The increase with increasing level haze, reaching maximum (0.37 μg m −3 h −1 at maintenance stage. Moreover, our reveals there are non‐negligible non‐linear emission, during stage, mean accounting 50% concentrations, which often ignored current control strategies. This study highlights can be used gain insight formation heavy pollution, identify uncertainty numerical models.

Language: Английский

Citations

1
Aerosol light absorption alleviates particulate pollution during wintertime haze events DOI Creative Commons
Jiarui Wu,

Naifang Bei,

Yuan Wang

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 122(1)

Published: Dec. 23, 2024

Aerosol light absorption has been widely considered as a contributing factor to the worsening of particulate pollution in large urban areas, primarily through its role stabilizing planetary boundary layer (PBL). Here, we report that absorption-dominated aerosol–radiation interaction can decrease near-surface fine matter concentrations ([PM 2.5 ]) at large-scale during wintertime haze events. A “warm bubble” effect by significant heating rate absorbing aerosols above PBL top generates secondary circulation, enhancing upward motion (downward motion) and convergence (divergence) polluted (relatively clean) with net lowering [PM ]. Furthermore, aerosol ultraviolet-wave effectively reduces photolysis chemical species, i.e., aerosol–photolysis interaction, hindering ozone formation, reducing atmospheric oxidizing capability, suppressing concentrations. Our model assessment reveals synergetic two effects ] around 7.4%, so presence light-absorbing considerably alleviate Such negative feedbacks loading should be weather/climate prediction health models.

Language: Английский

Citations

1