Prasanth Prabhakaran
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View article: Aerosol-Cloud Interactions in Marine Low-Clouds in a Warmer Climate
Aerosol-Cloud Interactions in Marine Low-Clouds in a Warmer Climate Open
We explore the impact of aerosol perturbation on the stratocumulus-to-cumulus transition (SCT) in a warmer climate in the North-East Pacific region using a Lagrangian large-eddy simulation model coupled to a two-moment, bin-emulating bulk …
View article: Magnitude and timescale of liquid water path adjustments to cloud droplet number concentration perturbations for nocturnal non-precipitating marine stratocumulus
Magnitude and timescale of liquid water path adjustments to cloud droplet number concentration perturbations for nocturnal non-precipitating marine stratocumulus Open
Cloud liquid water path (L) adjusts to perturbations in cloud droplet number concentration (N) over time. We explore the magnitude and timescale of this adjustment in nocturnal non-precipitating marine stratocumuli using large eddy simulat…
View article: Magnitude and timescale of liquid water path adjustments to cloud droplet number concentration perturbations for nocturnal non-precipitating marine stratocumulus
Magnitude and timescale of liquid water path adjustments to cloud droplet number concentration perturbations for nocturnal non-precipitating marine stratocumulus Open
Cloud liquid water path (L) adjusts to perturbations in cloud droplet number concentration (N) over time. We explore the magnitude and timescale of this adjustment in nocturnal non-precipitating marine stratocumuli using large eddy simulat…
View article: Physical science research needed to evaluate the viability and risks of marine cloud brightening
Physical science research needed to evaluate the viability and risks of marine cloud brightening Open
Marine cloud brightening (MCB) is the deliberate injection of aerosol particles into shallow marine clouds to increase their reflection of solar radiation and reduce the amount of energy absorbed by the climate system. From the physical sc…
View article: Effects of intermittent aerosol forcing on the stratocumulus-to-cumulus transition
Effects of intermittent aerosol forcing on the stratocumulus-to-cumulus transition Open
We explore the role of intermittent aerosol forcing (e.g., injections associated with marine cloud brightening) in the stratocumulus-to-cumulus transition (SCT). We simulate a 3 d Lagrangian trajectory in the northeast Pacific using a larg…
View article: Comment on egusphere-2023-1720
Comment on egusphere-2023-1720 Open
Abstract. We explore the role of intermittent aerosol forcing (e.g., ship tracks, or injections associated with marine cloud brightening) on the stratocumulus-to-cumulus transition (SCT). We simulate a three-day Lagrangian trajectory in th…
View article: Comment on egusphere-2023-1720
Comment on egusphere-2023-1720 Open
Abstract. We explore the role of intermittent aerosol forcing (e.g., ship tracks, or injections associated with marine cloud brightening) on the stratocumulus-to-cumulus transition (SCT). We simulate a three-day Lagrangian trajectory in th…
View article: Effects of Intermittent Aerosol Forcing on the Stratocumulus-to-Cumulus Transition
Effects of Intermittent Aerosol Forcing on the Stratocumulus-to-Cumulus Transition Open
We explore the role of intermittent aerosol forcing (e.g., ship tracks, or injections associated with marine cloud brightening) on the stratocumulus-to-cumulus transition (SCT). We simulate a three-day Lagrangian trajectory in the north-ea…
View article: DOE-NOAA Marine Cloud Brightening (Workshop Report 2022)
DOE-NOAA Marine Cloud Brightening (Workshop Report 2022) Open
Marine Cloud Brightening (MCB) refers to the deliberate injection of aerosol particles into marine clouds to increase their reflection of solar radiation to temporarily cool the planet while decarbonization efforts are pursued. A workshop …
View article: Sources of Stochasticity in the Growth of Cloud Droplets: Supersaturation Fluctuations versus Turbulent Transport
Sources of Stochasticity in the Growth of Cloud Droplets: Supersaturation Fluctuations versus Turbulent Transport Open
The role played by fluctuations of supersaturation in the growth of cloud droplets is examined in this study. The stochastic condensation framework and the three regimes of activation of cloud droplets— namely, mean dominant, fluctuation i…
View article: Exploring the Influence of the Duration of Aerosol Perturbations on Cloud Responses
Exploring the Influence of the Duration of Aerosol Perturbations on Cloud Responses Open
<p>High-resolution modeling of aerosol-cloud interactions typically applies aerosol perturbations for the duration of the simulation, which may be anywhere from a few hours to a few days.</p><p>In reality, however, natura…
View article: Dimensionless parameters for cloudy Rayleigh-Bénard convection: Supersaturation, Damköhler, and Nusselt numbers
Dimensionless parameters for cloudy Rayleigh-Bénard convection: Supersaturation, Damköhler, and Nusselt numbers Open
In steady-state Rayleigh-Bénard convection, heat is transported by turbulent thermal convection from the bottom, hot surface to the top, cold surface, leading to a height-independent sensible heat flux. When water vapor is present and clou…
View article: Effects of the large-scale circulation on temperature and water vapor distributions in the Π Chamber
Effects of the large-scale circulation on temperature and water vapor distributions in the Π Chamber Open
Microphysical processes are important for the development of clouds and thus Earth's climate. For example, turbulent fluctuations in the water vapor mixing ratio, r, and temperature, T, cause fluctuations in the saturation ratio, S. Becaus…
View article: Review of the manuscript amt-2021-13
Review of the manuscript amt-2021-13 Open
Abstract. Microphysical processes are important for the development of clouds and thus Earth's climate. For example, turbulent fluctuations in the water vapor mixing ratio, r, and temperature, T, cause fluctuations in the saturation ratio,…
View article: Is the water vapor supersaturation distribution Gaussian?
Is the water vapor supersaturation distribution Gaussian? Open
Water vapor supersaturation in the atmosphere is produced in a variety of ways, including the lifting of a parcel or via isobaric mixing of parcels. However, irrespective of the mechanism of production, the water vapor supersaturation in t…
View article: Comment on amt-2021-13
Comment on amt-2021-13 Open
Abstract. Microphysical processes are important for the development of clouds and thus Earth's climate. For example, turbulent fluctuations in the water vapor mixing ratio, r, and temperature, T, cause fluctuations in the saturation ratio,…
View article: Effects of the Large-Scale Circulation on Temperature and WaterVapor Distributions in the Π Chamber
Effects of the Large-Scale Circulation on Temperature and WaterVapor Distributions in the Π Chamber Open
Microphysical processes are important for the development of clouds and thus Earth's climate. For example, turbulent fluctuations in the water vapor concentration, r, and temperature, T, cause fluctuations in the saturation ratio, S. Becau…
View article: Dependence of Aerosol‐Droplet Partitioning on Turbulence in a Laboratory Cloud
Dependence of Aerosol‐Droplet Partitioning on Turbulence in a Laboratory Cloud Open
Activation is the first step in aerosol‐cloud interactions, which have been identified as one of the principal uncertainties in Earth's climate system. Aerosol particles become cloud droplets, or activate, when the ambient saturation ratio…
View article: Data supporting the paper "Is the water vapor supersaturation distribution Gaussian?"
Data supporting the paper "Is the water vapor supersaturation distribution Gaussian?" Open
The data in this file are from the MTU Pi Cloud Chamber and large eddy simulations. This work was supported by NSF grant AGS-1754244. Data are made available in support of the above publication by Thomas et al.. For any further use, e.g., …
View article: Industrial Effluent Discharge Altered Proximate Composition of the Marine Fish
Industrial Effluent Discharge Altered Proximate Composition of the Marine Fish Open
The present study was carried out to estimate the effect of the industrial effluent discharge on proximate composition of commercial landing six fish species in Gulf of Mannar. It was found that, there was variation in moisture, fat and as…
View article: The role of turbulent fluctuations in aerosol activation and cloud formation
The role of turbulent fluctuations in aerosol activation and cloud formation Open
Significance Formation of cloud droplets is a threshold phenomenon; droplets form only when the local relative humidity (RH) exceeds a critical value which depends on the size and chemical composition of preexisting aerosol particles which…
View article: High Supersaturation in the Wake of Falling Hydrometeors: Implications for Cloud Invigoration and Ice Nucleation
High Supersaturation in the Wake of Falling Hydrometeors: Implications for Cloud Invigoration and Ice Nucleation Open
Aerosol particles, cloud droplets, and ice crystals, coupled through the supersaturation field, play an important role in the buoyancy and life cycle of convective clouds. This letter reports laboratory observations of copious cloud drople…
View article: Turbulent Jet: A DNS Study
Turbulent Jet: A DNS Study Open
The entrainment of ambient fluid into a turbulent shear flow has been a topic of wide interest for several decades. To estimate the entrainment of ambient fluid into turbulent jet, it is essential to define the boundary of the jet. The que…
View article: A DNS Study of entrainment in an axisymmetric turbulent jet as an episodic process
A DNS Study of entrainment in an axisymmetric turbulent jet as an episodic process Open
This investigation is based on a DNS of a steady self-preserving incompressible axisymmetric turbulent jet at a Reynolds number of 2400. The DNS data enable accurate maps of the outer irrotational flow field, and also the vorticity field i…
View article: Ice nucleation in the wake of warm hydrometeors
Ice nucleation in the wake of warm hydrometeors Open
The formation of ice in mixed phase clouds greatly impacts Earths hydrologic cycle. The intensity, distribution and frequency of precipitation as well as radiative properties of clouds in the mid latitudes are strongly influenced by the nu…
View article: Leidenfrost Pattern Formation and Boiling
Leidenfrost Pattern Formation and Boiling Open
We report on Leidenfrost patterns and boiling with compressed sulfur hexafluoride (SF6). The experiments were carried out in a large aspect ratio Rayleigh–Bénard convection cell, where the distance between the horizontal plates is comparab…
View article: Moist Rayleigh Benard Convection
Moist Rayleigh Benard Convection Open
Clouds play an important yet poorly understood role in weather forecasting and climate change. The objective in the present work is to establish a laboratory-scale experiment for simulating clouds in the Earth's atmosphere. The experiments…