3D assimilation and radiative impact assessment of aerosol black carbon over the Indian region using aircraft, balloon, ground-based, and multi-satellite observations DOI Creative Commons

Nair Krishnan Kala,

Anand Narayana Sarma,

Mohanan R. Manoj

et al.

Atmospheric chemistry and physics, Journal Year: 2023, Volume and Issue: 23(19), P. 12801 - 12819

Published: Oct. 12, 2023

Abstract. A three-dimensional (spatial and vertical) gridded data set of black carbon (BC) aerosols has been developed for the first time over Indian mainland using from a dense ground-based network, aircraft- balloon-based measurements multiple campaigns, multi-satellite observations, following statistical assimilation techniques. The assimilated reveal that satellite products tend to underestimate (overestimate) aerosol absorption at lower (higher) altitudes with possible climate implications. regional maps BC-induced atmospheric heating derived this capture elevated layers region along spatial high Indo-Gangetic Plain. It is shown that, most region, incorporation realistic profiles absorption/extinction coefficients single scattering albedo into radiative transfer calculations leads enhanced high-altitude warming. This could strongly influence upper-tropospheric lower-stratospheric processes, including vertical transport BC higher altitudes, thus have larger implications stability than what would be predicted observations alone. will alone increased altitudes. 3D helpful in reducing uncertainty effects model simulations region.

Language: Английский

The impact of uncertainty in black carbon's refractive index on simulated optical depth and radiative forcing DOI Creative Commons
Ruth A. R. Digby, Knut von Salzen, Adam H. Monahan

et al.

Atmospheric chemistry and physics, Journal Year: 2025, Volume and Issue: 25(5), P. 3109 - 3130

Published: March 14, 2025

Abstract. The radiative forcing of black carbon (BC) is subject to many complex, interconnected sources uncertainty. Here we isolate the role refractive index, which determines extent BC absorbs and scatters radiation. We compare four index schemes: three that are commonly used in Earth system models a fourth more recent estimate with higher absorption. With other parameterizations held constant, changing BC's spectrally varying from least- most-absorbing (m550 nm=1.75–0.44i m550 nm=1.95–0.79i) increases simulated absorbing aerosol optical depth (AAOD) by 42 % effective BC–radiation interactions (BC ERFari) 47 %. estimate, m532 nm=1.48–0.84i, AAOD ERFari 59 100 respectively relative low-absorption case. comparable those updates emission inventories and, source regions, up two-thirds as large difference retrieved MISR (Multi-angle Imaging SpectroRadiometer) POLDER-GRASP (Polarization Directionality Earth's Reflectances instrument Generalized Retrieval Atmosphere Surface Properties algorithm) satellites. previous assessments overall uncertainties ERFari, even though this uncertainty typically overlooked. Although model sensitivity choice known be modulated parameterization choices, our results highlight importance considering diversity intercomparison projects.

Language: Английский

Citations

0
A comprehensive in situ and remote sensing data set collected during the HALO–(𝒜 𝒞)3 aircraft campaign DOI Creative Commons
André Ehrlich, Susanne Crewell, Andreas Herber

et al.

Earth system science data, Journal Year: 2025, Volume and Issue: 17(3), P. 1295 - 1328

Published: April 1, 2025

Abstract. The HALO–(𝒜𝒞)3 aircraft campaign was carried out in March and April 2022 over the Norwegian Greenland seas, Fram Strait, central Arctic Ocean. Three research – High Altitude Long Range Research Aircraft (HALO), Polar 5, 6 performed 54 partly coordinated flights on 23 flight days areas of open ocean, marginal sea ice zone (MIZ), ice. general objective to quantify evolution air mass properties during moist warm-air intrusions (WAIs) cold-air outbreaks (CAOs). To obtain a comprehensive data set, three operated following different strategies. HALO equipped with active passive remote sensing instruments dropsondes cover regional cloud thermodynamic processes. 5 similar payload HALO, instrumented situ cloud, aerosol, trace gas focusing initial transformation close MIZ. processed, calibrated, validated are published World Data Center PANGAEA as instrument-separated subsets listed aircraft-separated collections for (Ehrlich et al., 2024a, https://doi.org/10.1594/PANGAEA.968885), (Mech https://doi.org/10.1594/PANGAEA.968883), (Herber 2024, https://doi.org/10.1594/PANGAEA.968884). A detailed overview available sets is provided here. Furthermore, campaign-specific instrument setup, processing, quality summarized. Based measurements conducted specific CAO, it shown that scientific analysis benefits from operation aircraft.

Language: Английский

Citations

0
Arctic mixed-phase clouds simulated by the WRF model: Comparisons with ACLOUD radar and in situ airborne observations and sensitivity of microphysics properties DOI Creative Commons

Diana Arteaga,

Céline Planche, Frédéric Tridon

et al.

Atmospheric Research, Journal Year: 2024, Volume and Issue: 307, P. 107471 - 107471

Published: May 14, 2024

The microphysical properties of two mixed-phase clouds (MPCs), one over sea ice, and another open ocean, are investigated using in situ measuring probes a cloud radar installed on-board aircraft during the Arctic CLoud Observations Using airborne measurements polar Day (ACLOUD) field campaign, west Svalbard on 17 June 2017. Comparisons between observations different configurations Weather Research Forecasting (WRF) model conducted reveal discrepancies vertical profile ice crystal concentrations for both MPCs due to slightly higher temperatures (by approx. 1–2 °C) WRF than observed, affecting formation. A comprehensive sensitivity analysis is carried out address impact assumptions used microphysics (MP) atmospheric boundary layer (ABL) schemes simulated MPC systems. role resolution large scale data initialisation also investigated. Results show that performance improves large-scale with more numerous levels close surface. Moreover, modifying ABL or MP scheme influences altitudes top base as well liquid water amounts. Our study highlights how an increase condensation nuclei droplet number can profiles

Language: Английский

Citations

2
Relating the single particle soot photometer (SP2) signal response to soot maturity DOI Creative Commons
Lovisa Nilsson, Sandra Török, Erik Ahlberg

et al.

Aerosol Science and Technology, Journal Year: 2024, Volume and Issue: 58(7), P. 764 - 778

Published: April 25, 2024

Light absorbing carbonaceous aerosols produced from combustion span over a range of physicochemical properties. Soot is the most recognized species in this category and its formation process involves gradual maturation amorphous young soot with high hydrogen-to-carbon-ratio toward mature aggregates. In work, optical response single particle photometer (SP2) to electrical mobility size selected different maturity by mini-CAST generator investigated. The results show that for specific diameter, laser-induced incandescence (LII) signal appears earlier higher LII peak height increasing maturity. experimental observations are supported simulations using numerical model process. Furthermore, effect systematically varying SP2 laser power on detection explored. This work can be seen as step aim instrument identify particles atmosphere.

Language: Английский

Citations

1
Understanding Aerosol-Cloud Interactions Through Lidar Techniques: A Review DOI Open Access
Francesco Cairo, Luca Di Liberto, Davide Dionisi

et al.

Published: June 21, 2024

Aerosol-cloud interactions play a crucial role in shaping Earth’s climate and hydrological 1 cycle. Observing these with high precision accuracy is of the utmost importance 2 for improving models predicting climate. Over past few decades, lidar 3 techniques have emerged as powerful tools investigating aerosol-cloud due to their 4 ability provide detailed vertical profiles aerosol particles clouds spatial 5 temporal resolutions. This review paper provides an overview recent advancements study 6 using techniques. The begins description 7 different cloud microphysical processes that are affected by presence aerosol, 8 outline remote sensing application characterizing clouds. 9 subsequent sections delve into key findings insights gained from lidar-based studies 10 interactions. includes investigations 11 formation, evolution, properties. Finally, concludes outlook 12 on future research. By reporting latest methodologies, this aims 13 valuable researchers engaged science atmospheric

Language: Английский

Citations

1
Understanding Aerosol–Cloud Interactions through Lidar Techniques: A Review DOI Creative Commons
Francesco Cairo, Luca Di Liberto, Davide Dionisi

et al.

Remote Sensing, Journal Year: 2024, Volume and Issue: 16(15), P. 2788 - 2788

Published: July 30, 2024

Aerosol–cloud interactions play a crucial role in shaping Earth’s climate and hydrological cycle. Observing these with high precision accuracy is of the utmost importance for improving models predicting climate. Over past few decades, lidar techniques have emerged as powerful tools investigating aerosol–cloud due to their ability provide detailed vertical profiles aerosol particles clouds spatial temporal resolutions. This review paper provides an overview recent advancements study ACI using techniques. The begins description different cloud microphysical processes that are affected by presence aerosol, outline remote sensing application characterizing clouds. subsequent sections delve into key findings insights gained from lidar-based studies interactions. includes investigations formation, evolution, properties. Finally, concludes outlook on future research. By reporting latest methodologies, this aims valuable researchers engaged science atmospheric

Language: Английский

Citations

1
The impact of uncertainty in black carbon's refractive index on simulated optical depth and radiative forcing DOI Open Access
Ruth A. R. Digby, Knut von Salzen, Adam H. Monahan

et al.

Authorea (Authorea), Journal Year: 2024, Volume and Issue: unknown

Published: June 10, 2024

We vary the refractive index of black carbon from 1.75-0.44ito 1.95-0.79i in a 9member, 2015-2019 CanAM5.1-PAMensemble.• Global-mean AAOD increases 42%, similar to impact updating aerosol emissions and 1/6 difference between MISR POLDER-GRASP.• BC ERFari 47%, comparable uncertainty recent literature assessments.

Language: Английский

Citations

0
3D assimilation and radiative impact assessment of aerosol black carbon over the Indian region using aircraft, balloon, ground-based, and multi-satellite observations DOI Creative Commons

Nair Krishnan Kala,

Anand Narayana Sarma,

Mohanan R. Manoj

et al.

Atmospheric chemistry and physics, Journal Year: 2023, Volume and Issue: 23(19), P. 12801 - 12819

Published: Oct. 12, 2023

Abstract. A three-dimensional (spatial and vertical) gridded data set of black carbon (BC) aerosols has been developed for the first time over Indian mainland using from a dense ground-based network, aircraft- balloon-based measurements multiple campaigns, multi-satellite observations, following statistical assimilation techniques. The assimilated reveal that satellite products tend to underestimate (overestimate) aerosol absorption at lower (higher) altitudes with possible climate implications. regional maps BC-induced atmospheric heating derived this capture elevated layers region along spatial high Indo-Gangetic Plain. It is shown that, most region, incorporation realistic profiles absorption/extinction coefficients single scattering albedo into radiative transfer calculations leads enhanced high-altitude warming. This could strongly influence upper-tropospheric lower-stratospheric processes, including vertical transport BC higher altitudes, thus have larger implications stability than what would be predicted observations alone. will alone increased altitudes. 3D helpful in reducing uncertainty effects model simulations region.

Language: Английский

Citations

0