Pathways of ice multiplication in nimbostratus clouds during the Indian summer monsoon
(2024) In Atmospheric Research 309.- Abstract
The present study illustrates the microphysical parameters of nimbostratus clouds during the Indian summer monsoon using airborne and radar observations conducted as part of the Cloud Aerosol Interaction and Precipitation Enhancement Experiment (CAIPEEX), and simulations with the Weather Research and Forecasting (WRF) model. The study also analyzes the impact of secondary ice production (emphasizing the microphysical pathways of Hallett-Mossop (HM) as represented in the models) on cloud processes using model sensitivity simulations. The effect of possible pathways of riming during the HM process is the focus of the sensitivity simulations. Aircraft observations showed higher ice particle concentrations in the Hallett–Mossop zone (−3 °C... (More)
The present study illustrates the microphysical parameters of nimbostratus clouds during the Indian summer monsoon using airborne and radar observations conducted as part of the Cloud Aerosol Interaction and Precipitation Enhancement Experiment (CAIPEEX), and simulations with the Weather Research and Forecasting (WRF) model. The study also analyzes the impact of secondary ice production (emphasizing the microphysical pathways of Hallett-Mossop (HM) as represented in the models) on cloud processes using model sensitivity simulations. The effect of possible pathways of riming during the HM process is the focus of the sensitivity simulations. Aircraft observations showed higher ice particle concentrations in the Hallett–Mossop zone (−3 °C to - 8 °C) along with the existence of smaller and larger cloud droplets, rimed needles, columns, and snow particles. Observations strongly suggested the active presence of the HM process in this cloud. The observed mean values of microphysical parameters including liquid water content, ice number concentrations, and maximum vertical velocity, agreed well with model simulations. The number concentration and water content of ice crystals and snow decreased in the HM zone during the HM inactive case. A reduction in rainfall is also observed in the absence of HM. HM increases convection as it causes a sudden increase in the number concentration of small ice particles, which causes rainwater to freeze quickly and water vapour to be consumed by diffusional growth. Latent heating is produced by both effects, which energizes the convection.
(Less)
- author
- Kambrath, Gokul Kavil ; Gayatri, K. ; Patade, Sachin LU ; Samanta, Soumya ; Jayarao, Y. ; Murugavel, P. ; Sandeep, J. and Prabhakaran, T. V.
- organization
- publishing date
- 2024-10
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- CAIPEEX, Mixed-phase processes, Secondary ice production, WRF model
- in
- Atmospheric Research
- volume
- 309
- article number
- 107590
- publisher
- Elsevier
- external identifiers
-
- scopus:85199750052
- ISSN
- 0169-8095
- DOI
- 10.1016/j.atmosres.2024.107590
- language
- English
- LU publication?
- yes
- id
- 9c1f339f-72f6-4386-a924-cf9dbb182b08
- date added to LUP
- 2024-09-02 14:36:14
- date last changed
- 2025-04-04 14:44:39
@article{9c1f339f-72f6-4386-a924-cf9dbb182b08,
abstract = {{<p>The present study illustrates the microphysical parameters of nimbostratus clouds during the Indian summer monsoon using airborne and radar observations conducted as part of the Cloud Aerosol Interaction and Precipitation Enhancement Experiment (CAIPEEX), and simulations with the Weather Research and Forecasting (WRF) model. The study also analyzes the impact of secondary ice production (emphasizing the microphysical pathways of Hallett-Mossop (HM) as represented in the models) on cloud processes using model sensitivity simulations. The effect of possible pathways of riming during the HM process is the focus of the sensitivity simulations. Aircraft observations showed higher ice particle concentrations in the Hallett–Mossop zone (−3 °C to - 8 °C) along with the existence of smaller and larger cloud droplets, rimed needles, columns, and snow particles. Observations strongly suggested the active presence of the HM process in this cloud. The observed mean values of microphysical parameters including liquid water content, ice number concentrations, and maximum vertical velocity, agreed well with model simulations. The number concentration and water content of ice crystals and snow decreased in the HM zone during the HM inactive case. A reduction in rainfall is also observed in the absence of HM. HM increases convection as it causes a sudden increase in the number concentration of small ice particles, which causes rainwater to freeze quickly and water vapour to be consumed by diffusional growth. Latent heating is produced by both effects, which energizes the convection.</p>}},
author = {{Kambrath, Gokul Kavil and Gayatri, K. and Patade, Sachin and Samanta, Soumya and Jayarao, Y. and Murugavel, P. and Sandeep, J. and Prabhakaran, T. V.}},
issn = {{0169-8095}},
keywords = {{CAIPEEX; Mixed-phase processes; Secondary ice production; WRF model}},
language = {{eng}},
publisher = {{Elsevier}},
series = {{Atmospheric Research}},
title = {{Pathways of ice multiplication in nimbostratus clouds during the Indian summer monsoon}},
url = {{http://dx.doi.org/10.1016/j.atmosres.2024.107590}},
doi = {{10.1016/j.atmosres.2024.107590}},
volume = {{309}},
year = {{2024}},
}