Microphysical properties of atmospheric soot and organic particles: measurements, modeling, and impacts

npj Climate and Atmospheric Science, Journal Year: 2024, Volume and Issue: 7(1)

Published: March 8, 2024

Abstract Atmospheric soot and organic particles from fossil fuel combustion biomass burning modify Earth’s climate through their interactions with solar radiation modifications of cloud properties by acting as condensation nuclei ice nucleating particles. Recent advancements in understanding individual microscopic composition have led to heightened interest microphysical properties. This review article provides an overview current advanced measurements offers insights into future avenues for studying these To quantify morphology ageing, fractal dimension ( D f ) is a commonly employed quantitative metric which allows characterize morphologies aggregates relation ageing factors like internal mixing state, core-shell structures, phase, heterogeneity. Models been developed incorporate diversity metrics aged particles, enabling assessment optical absorption radiative forcing effects. The are complex they influenced particle sources, process, meteorological conditions. Furthermore, soluble exhibit diverse forms can engage liquid–liquid phase separation sulfate nitrate components. Primary carbonaceous such tar balls warrant further attention due strong light absorbing properties, presence toxic constituents, small size, impact human health. Future research needs include both atmospheric modeling approaches, focusing on changes the structures ensembles, effects dynamics

Language: Английский

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Recent global temperature surge intensified by record-low planetary albedo

Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 5, 2024

In 2023, the global mean temperature soared to almost 1.5K above pre-industrial level, surpassing previous record by about 0.17K. Previous best-guess estimates of known drivers including anthropogenic warming and El Niño onset fall short 0.2K in explaining rise. Utilizing satellite reanalysis data, we identify a record-low planetary albedo as primary factor bridging this gap. The decline is apparently caused largely reduced low-cloud cover northern mid-latitudes tropics, continuation multi-annual trend. Further exploring trend understanding how much it due internal variability, aerosol concentrations, or possibly emerging feedback will be crucial for assessing current expected future warming.

Language: Английский

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Multi-platform observations and constraints reveal overlooked urban sources of black carbon in Xuzhou and Dhaka

Communications Earth & Environment, Journal Year: 2025, Volume and Issue: 6(1)

Published: Jan. 20, 2025

Language: Английский

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Rapidly evolving aerosol emissions are a dangerous omission from near-term climate risk assessments

Environmental Research Climate, Journal Year: 2023, Volume and Issue: 2(3), P. 032001 - 032001

Published: June 6, 2023

Abstract Anthropogenic aerosol emissions are expected to change rapidly over the coming decades, driving strong, spatially complex trends in temperature, hydroclimate, and extreme events both near far from emission sources. Under-resourced, highly populated regions often bear brunt of aerosols’ climate air quality effects, amplifying risk through heightened exposure vulnerability. However, many policy-facing evaluations near-term risk, including those latest Intergovernmental Panel on Climate Change assessment report, underrepresent regionally diverse reducing them a globally averaged offset greenhouse gas warming. We argue that this constitutes major missing element society’s ability prepare for future change. outline pathway towards progress call greater interaction between research, impact modeling, scenario development, communities.

Language: Английский

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Characterizing the spatio-temporal distribution, detection, and prediction of aerosol atmospheric rivers on a global scale

Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 351, P. 119675 - 119675

Published: Dec. 3, 2023

Language: Английский

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Reducing Aerosol Forcing Uncertainty by Combining Models With Satellite and Within‐The‐Atmosphere Observations: A Three‐Way Street

Reviews of Geophysics, Journal Year: 2023, Volume and Issue: 61(2)

Published: May 4, 2023

Abstract Aerosol forcing uncertainty represents the largest climate overall. Its magnitude has remained virtually undiminished over past 20 years despite considerable advances in understanding most of key contributing elements. Recent work produced modest increases only confidence estimate itself. This review summarizes contributions toward reducing aerosol made by satellite observations, measurements taken within atmosphere, as well modeling and data assimilation. We adopt a more measurement‐oriented perspective than reviews subject assessing strengths limitations each; gaps possible ways to fill them are considered. Currently planned programs supporting advanced, global‐scale surface‐based aerosol, cloud, precursor gas modeling, intensive field campaigns aimed at characterizing underlying physical chemical processes involved, all essential. But addition, new efforts needed: (a) obtain systematic aircraft situ capturing multi‐variate probability distribution functions particle optical, microphysical, properties (and associated estimates), co‐variability with meteorology, for major airmass types; (b) conceive, develop, implement suborbital (aircraft plus surface‐based) program systematically quantifying cloud‐scale microphysics, cloud optical properties, cloud‐related vertical velocities aerosol‐cloud interactions; (c) focus much research on integrating unique measurements, reduce persistent forcing.

Language: Английский

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HETEAC – the Hybrid End-To-End Aerosol Classification model for EarthCARE

Atmospheric measurement techniques, Journal Year: 2023, Volume and Issue: 16(10), P. 2485 - 2510

Published: May 25, 2023

Abstract. The Hybrid End-To-End Aerosol Classification (HETEAC) model for the Earth Clouds, Aerosols and Radiation Explorer (EarthCARE) mission is introduced. serves as common baseline development, evaluation, implementation of EarthCARE algorithms. It guarantees consistency different aerosol products from multi-instrument platform facilitates conformity broad-band optical properties needed radiative-closure assessments. While hybrid approach ensures that theoretical description microphysical consistent with measured types, end-to-end permits uniform representation types in terms microphysical, optical, radiative properties. Four basic components prescribed are used to compose various natural anthropogenic aerosols troposphere. contain weakly strongly absorbing fine-mode spherical non-spherical coarse-mode particles thus representative pollution, smoke, sea salt, dust, respectively. Their selected such good coverage observational phase space intensive, i.e., concentration-independent, derived measurements obtained. Mixing rules calculate any blend composed four provided. Applications HETEAC generation test scenes, development retrieval algorithms stand-alone synergistic EarthCARE's atmospheric lidar (ATLID) multi-spectral imager (MSI), assessments Finally, implications simplifying assumptions possible improvements discussed, conclusions future validation work drawn.

Language: Английский

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Dissecting the contributions of organic nitrogen aerosols to global atmospheric nitrogen deposition and implications for ecosystems

National Science Review, Journal Year: 2023, Volume and Issue: 10(12)

Published: Sept. 18, 2023

Atmospheric deposition of particulate organic nitrogen (ONp) is a significant process in the global cycle and may be pivotally important for N-limited ecosystems. However, past models largely overlooked spatial chemical inhomogeneity atmospheric ONp were thus deficient assessing impacts. We constructed comprehensive model gaseous (ON), including latest knowledge on emissions secondary formations. Using this model, we simulated abundances consistent with observations. Our estimated ON was 26 Tg N yr-1, predominantly form (23 yr-1) mostly from wildfires (37%), oceans (22%) aqueous productions (17%). Globally, contributed as much 40% to 80% total downwind biomass-burning regions. constituted dominant external supply boreal forests, tundras Arctic Ocean, its importance amplified future warming climate.

Language: Английский

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Air Pollution Interactions with Weather and Climate Extremes: Current Knowledge, Gaps, and Future Directions

Current Pollution Reports, Journal Year: 2024, Volume and Issue: 10(3), P. 430 - 442

Published: Feb. 22, 2024

Language: Английский

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Exploring radiative forcing sensitivity to aerosol optical properties across varied geographical regions in India

Air Quality Atmosphere & Health, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 26, 2024

Language: Английский

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