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Aerosols Radiative Forcing - Astrophysics Data System

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Last Updated: 03 May 2022

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Numerical study of aerosol radiative forcing over East Asia and the impacts of cloud coverage and relative humidity

Using a regional climate model, the spatiotemporal characteristics of aerosol direct radiative forcing and its relative contributions from aerosol species, as well as the effects of cloud coverage and relative humidity on aerosol direct RF in East Asia were quantified. In addition, the fine dust contributes much to the positive TOA RF and atmospheric heating in spring and summer, which were weakened and lighter than black carbon in other seasons. Cloud enhances the visibility and black carbon direct RF at TOA, weakens the other species direct RF, while static aerosol species cause poor direct RFs of all aerosol species at surface, according to Sensitivity studies. Both TOA and surface, the aerosol swelling effect triggered by relative humidity increases aerosol direct RF at both TOA and surface. The impacts of cloud on aerosol direct RF are comparable to relative humidity and are expected to be more relevant at TOA and surface, according to the authors.

Source link: https://ui.adsabs.harvard.edu/abs/2022AtmRe.27306168G/abstract


Observationally constrained estimates of carbonaceous aerosol radiative forcing

Black carbon, a strong absorber of solar radiation, and organic matter were among the fossil and biomass fuels emitted by fossil and biomass fuels, as black carbon, a strong absorber of solar radiation, and organic matter. From 0 to 2. 2 Wm -2, to be compared to the Intergovernmental Panel on Climate Change's estimate for the pre-Industrial to the new net radiative forcing of about 1. 6 Wm -2, there are varying degrees of global CA radiative forcing ranges. To get a decadal global view of the CA optical properties and direct radiative forcing, ground-based aerosol network results are integrated with field data and satellite-based aerosol observations. According to the estimated global CA direct radiative effect, the only noticeable effect is about 0. 75 Wm -2. Because of BrC's inclusion, the net effect of OM is near to zero, and CA forcing is nearly equal to that of BC.

Source link: https://ui.adsabs.harvard.edu/abs/2012PNAS..10911624C/abstract


Study on the Characteristics of Aerosol Radiative Forcing under Complex Pollution Conditions in Beijing

Aerosol radiative effects usually have a heating effect on the atmosphere and a cooling effect on the surface, and they are also key climate change influencing uncertainty factors. A report on the distribution of aerosol optical depth in Beijing was developed as a result of methodical measurement regional aerosol direct radiative forcing was expanded based on the Moderate-Resolution Imaging Spectrometer and Aerosol Optical Properties Observation Network, as a result of the Moderrate-Resolution Imaging Spectrometer and Aerosol Optical Properties Observation Network. The MODIS AOD and AERONET AOD both reached their correlation coefficient of 0. 9 at 412 nm, 470 nm, and 660 nm, according to the MODIS AOD and AERONET AOD's report. In addition, the ADRF of the atmosphere in Beijing under various levels of pollution was also calculated; the results show that the aerosol radiative effect becomes more apparent with rising pollution levels.

Source link: https://ui.adsabs.harvard.edu/abs/2022Atmos..13..501M/abstract


Exploring dimethyl sulfide (DMS) oxidation and implications for global aerosol radiative forcing

Aerosol indirect radiative forcing, which reveals how aerosols influence cloud formation and properties, is very relevant to preindustrial aerosol burdens. We expand the simplified DMS oxidation scheme used in the Community Atmospheric Model version 6 with chemistry to include the OH-addition pathway and the H-abstraction pathway as well as the related isomerization branch based on previous laboratory findings. DMS, MSA, HPMTF, and sulfate concentrations in most marine regions have been determined between simulated and observed concentrations of DMS, MSA, HPMTF, and sulfate over many marine regions, based on the NASA Atmospheric Tomography, the Aerosol and Cloud Experiment measurements, and the Variability of the American Monsoon Systems Ocean-Cloud-Land Study Regional Experiment measurements. We find that the global HPMTF burden and the burden of sulfate oxidation from DMS oxidation are relatively insensitive to the predicted isomerization rate, but HPMTF's burden is particularly sensitive to a potential additional cloud loss. According to the conventional simplified DMS oxidation method, we found that global sulfate burden under PI and PD emissions increased to 412 Gg S and 582 Gg S, respectively. DMS-derived sulfate alone has a higher annual mean global PD direct radiative effect, according to this article, at 0. 11 W m 2. The improved PI sulfate produced by the gas-phase chemistry updates alone dampens the aerosol IRF as expected. This research reveals the sensitivity of aerosol IRF to PI aerosol loading and the need to better understand the processes controlling aerosol production in the PI atmosphere and cloud reaction to these changes.

Source link: https://ui.adsabs.harvard.edu/abs/2022ACP....22.1549F/abstract


Effects of atmospheric transformations of the organic fraction of biomass burning aerosol on the radiative forcing: a box model analysis

We present the first findings of our numerical study, which aims to identify the potential effects of biomass burning aerosol's atmospheric diffusion on the aerosol direct radiative forcing. We found that atmospheric changes in the organic fraction of BB aerosol can result in significant changes in the BB aerosol DRF.

Source link: https://ui.adsabs.harvard.edu/abs/2021SPIE11916E..09K/abstract

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions