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Anthropogenic Cloud – Cirrus Clouds and Their Response to Anthropogenic Activities

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Since the resurgence of interest in cloud and precipitation physics, stimulated by the demonstration in 1946 of the possibility of cloud modification by artificial nucleation, an ever-increasing amount of research has been reported in the literature on the mechanisms Abstract Clouds have undergone changes as a result of climate change and humankind’s activities that have perturbed the Earth’s cloud system. This introduction lists the observed and hypothesized anthropogenic perturbations of clouds recognized today. It provides an overview of cloud-controlling factors, the extent and nature of anthropogenic perturbations of clouds, the The role of aerosol–radiation–cloud interactions in linking anthropogenic pollution over southern west Africa and dust emission over the Sahara

Abstract. Marine low-level clouds are key to the Earth’s energy budget due to their expansive coverage over global oceans and their high reflectance of incoming solar radiation. Their responses to anthropogenic aerosol perturbations remain the largest source of uncertainty in estimating the anthropogenic radiative forcing of cli-mate. Ähnliche Objekte (12) Global anthropogenic aerosol effects on convective clouds in ECHAM5-HAM Anthropogenic aerosol forcing under the Shared Socioeconomic Pathways Radiative forcing of anthropogenic aerosols on cirrus clouds using a hybrid ice nucleation scheme Abstract. Clouds constitute, through their interactions with incoming solar radiation and outgoing terrestrial radiation, a fundamental element of the Earth’s climate system. Different cloud types show a wide variety in cloud microphysical or optical properties, phase, vertical extent or temperature among others, and thus disparate radiative effects. Both in observational and

Approaches to Observe Anthropogenic Aerosol-Cloud Interactions

Rapid growth of anthropogenic organic nanoparticles greatly alters ...

Abstract. Anthropogenic emissions have been shown to affect new particle formation, aerosol concentrations, and clouds. Such effects vary with region, environmental conditions, and cloud types. In the wet season of Amazonia, anthropogenic emissions emitted from Manaus, Brazil, can significantly increase the cloud condensation nuclei (CCN) concentrations compared to the Cirrus clouds are ubiquitous, long-lived, high-level ice clouds that exert a considerable global radiative effect on the climate system. This review assesses recent observational and modeling evidence of how anthropogenic activities might affect cirrus. Changes in physical properties and chemical composition of liquid aerosol particles will unlikely affect Since the resurgence of interest in cloud and precipitation physics, stimulated by the demonstration in 1946 of the possibility of cloud modification by artificial nucleation, an ever-increasing amount of research has been reported in the literature on the mechanisms which underlie the formation of clouds and precipitation in the atmosphere. This research has

Abstract. Anthropogenic aerosols impact cirrus clouds through ice nucleation, thereby changing the Earth’s radiation budget. However, the magnitude and sign of anthropogenic forcing in cirrus clouds is still very uncertain depending on the treatments for ice-nucleating particles (INPs), the treatments for haze particle freezing, and the ice nucleation scheme. In Radiative forcing by aerosols through aerosol–cloud interactions (RFaci) is the most important anthropogenic cooling component contributing to Earth’s radiative forcing, and it remains the 6.2.1. Cumuliform Clouds that form in updrafts are called cumuliform clouds. The small and medium-size ones look like cotton balls, turrets on castles, or

Abstract. Understanding seasonal variations in cloud condensation nuclei (CCN) activity and the impact of anthropogenic emissions in marine environments is crucial for assessing climate change. This study presents findings from two shipborne observations conducted in the South China Sea (SCS) during the summer and winter of 2021. In summer, higher particle Abstract. The interactions between aeolian dust and anthropogenic air pollution, notably chemical ageing of mineral dust and coagulation of dust and pollution particles, modify the atmospheric aerosol composition and burden. Since the aerosol particles can act as cloud condensation nuclei, this affects the radiative transfer not only directly via aerosol–radiation

The activated cloud condensation nuclei (CCN) into cloud droplets were nearly equally low (<300 cm−3) in inland areas with little anthropogenic emissions Anthropogenic emissions were responsible to A homogenitus, anthropogenic or artificial cloud is a cloud induced by human activity. Although most clouds covering the sky have a purely natural origin, since the beginning of the Industrial Revolution, the use of fossil fuels and water vapor and other gases emitted by nuclear, thermal and geothermal power plants yield significant alterations of the local weather conditions. These

  • 6.2: Cloud Indentification
  • Cirrus Clouds and Their Response to Anthropogenic Activities
  • Observations of anthropogenic cloud condensation nuclei
  • Approaches to Observe Anthropogenic Aerosol-Cloud Interactions

Effects of emission reductions on major anthropogenic aerosol-radiation-cloud interactions in East Asia in winter during 2007–2020 Models with larger cloud responses to aerosol forcing are found to better reproduce the observed interhemispheric temperature changes and Increased importance of aerosol–cloud interactions for surface PM 2.5 pollution relative to aerosol–radiation interactions in China with the anthropogenic emission reductions

Detecting anthropogenic cloud perturbations with deep learning Duncan Watson-Parris * 1 Samuel Sutherland * 1 Matthew Christensen 1Anthony Caterini 2Dino Sejdinovic Philip Stier Abstract Different aerosol types present over the basin, notably dust, sea salt, and anthropogenic, contribute to the formation of cloud condensation and ice-nucleating particles, thus modifying cloud parameters.

Cirrus Clouds and Their Response to Anthropogenic Activities

Posted on December 21, 2023 (Updated on July 17, 2025) Unraveling the Enigma: Investigating the Possibility of Artificially Formed Clouds in Earth’s Atmosphere Weather & Forecasts Unraveling the Enigma: Are We Making Our Own Clouds? Look up at the sky. What do you see? Probably clouds, right? But have you ever wondered if those fluffy white shapes are entirely Anthropogenic absorbing aerosols could interact with dynamics to change clouds and precipitation locally or remotely. An active research field is forming to understand the mechanisms behind this type of effects. Recent findings particularly regarding the aerosol-dynamics coupling are reviewed.

Abstract. Anthropogenic emissions have been shown to affect new particle formation, aerosol concentrations, and clouds. Such effects vary with region, environmental conditions and cloud types. In the wet season of Amazonia, anthropogenic emissions emitted from Manaus, Brazil can significantly increase the cloud condensation nuclei (CCN) Strong anthropogenic cloud perturbations are usually visible until favorable liquid-water low-level clouds exist. Only in 12% of cases do liquid-phase stratiform clouds persist, but tracks disappear. Longer-lived tracks occur in anticyclonic conditions, and in case of statically very stable lower troposphere and low relative humidity The present study investigated the aerosol-radiation-cloud interaction of anthropogenic black carbon (BC) during a severe fog-haze event by utilizing

The activated cloud condensation nuclei (CCN) into cloud droplets were nearly equally low (<300 cm −3) in inland areas with little anthropogenic emissions Anthropogenic emissions were responsible to the greatly elevated concentrations of CCN over and downwind of urban agglomeration The enhanced CCN increased cloud depth for rain initiation up to 4 km, Probable physical mechanisms for this effect are the intense competition for available water vapour due to higher concentrations of anthropogenic aerosols and entrainment of dry air on cloud tops. Cloud condensation nuclei (CCN) concentrations and spectral measurements obtained with the DRI instantaneous CCN spectrometer (Hudson, 1989, J. atmos. ocean. Technol.6, 1055–1065) are presented. Anthropogenic CCN production mechanisms were readily identifiable while natural CCN production could not be detected.

Aerosol-cloud interactions remain uncertain in assessing climate change. While anthropogenic activities produce copious aerosol nanoparticles smaller than 10 nanometers, they are too small to act as efficient cloud condensation nuclei (CCN). The mechanisms responsible for particle growth to CCN-relevant sizes are poorly understood. Here, we present aircraft The influence of human-produced aerosols on clouds remains one of the uncertainties in radiative forcing of Earth’s climate. Measurements of aerosol chemistry from sources around the Philippines illustrate the linkage between aerosol chemical composition and cloud droplet characteristics. Differences in aerosol chemical composition in the marine layer