Numerical simulation of a rare winter hailstorm event over Delhi, India on 17 January 2013

Handle URI:
http://hdl.handle.net/10754/346798
Title:
Numerical simulation of a rare winter hailstorm event over Delhi, India on 17 January 2013
Authors:
Chevuturi, A.; Dimri, A. P.; Gunturu, Udaya ( 0000-0001-9172-1548 )
Abstract:
This study analyzes the cause of the rare occurrence of a winter hailstorm over New Delhi/NCR (National Capital Region), India. The absence of increased surface temperature or low level of moisture incursion during winter cannot generate the deep convection required for sustaining a hailstorm. Consequently, NCR shows very few cases of hailstorms in the months of December-January-February, making the winter hail formation a question of interest. For this study, a recent winter hailstorm event on 17 January 2013 (16:00–18:00 UTC) occurring over NCR is investigated. The storm is simulated using the Weather Research and Forecasting (WRF) model with the Goddard Cumulus Ensemble (GCE) microphysics scheme with two different options: hail and graupel. The aim of the study is to understand and describe the cause of hailstorm event during over NCR with a comparative analysis of the two options of GCE microphysics. Upon evaluating the model simulations, it is observed that the hail option shows a more similar precipitation intensity with the Tropical Rainfall Measuring Mission (TRMM) observation than the graupel option does, and it is able to simulate hail precipitation. Using the model-simulated output with the hail option; detailed investigation on understanding the dynamics of hailstorm is performed. The analysis based on a numerical simulation suggests that the deep instability in the atmospheric column led to the formation of hailstones as the cloud formation reached up to the glaciated zone promoting ice nucleation. In winters, such instability conditions rarely form due to low level available potential energy and moisture incursion along with upper level baroclinic instability due to the presence of a western disturbance (WD). Such rare positioning is found to be lowering the tropopause with increased temperature gradient, leading to winter hailstorm formation.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Numerical simulation of a rare winter hailstorm event over Delhi, India on 17 January 2013 2014, 14 (12):3331 Natural Hazards and Earth System Science
Publisher:
Copernicus GmbH
Journal:
Natural Hazards and Earth System Science
Issue Date:
19-Dec-2014
DOI:
10.5194/nhess-14-3331-2014
Type:
Article
ISSN:
1684-9981
Additional Links:
http://www.nat-hazards-earth-syst-sci.net/14/3331/2014/
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorChevuturi, A.en
dc.contributor.authorDimri, A. P.en
dc.contributor.authorGunturu, Udayaen
dc.date.accessioned2015-03-17T13:50:56Zen
dc.date.available2015-03-17T13:50:56Zen
dc.date.issued2014-12-19en
dc.identifier.citationNumerical simulation of a rare winter hailstorm event over Delhi, India on 17 January 2013 2014, 14 (12):3331 Natural Hazards and Earth System Scienceen
dc.identifier.issn1684-9981en
dc.identifier.doi10.5194/nhess-14-3331-2014en
dc.identifier.urihttp://hdl.handle.net/10754/346798en
dc.description.abstractThis study analyzes the cause of the rare occurrence of a winter hailstorm over New Delhi/NCR (National Capital Region), India. The absence of increased surface temperature or low level of moisture incursion during winter cannot generate the deep convection required for sustaining a hailstorm. Consequently, NCR shows very few cases of hailstorms in the months of December-January-February, making the winter hail formation a question of interest. For this study, a recent winter hailstorm event on 17 January 2013 (16:00–18:00 UTC) occurring over NCR is investigated. The storm is simulated using the Weather Research and Forecasting (WRF) model with the Goddard Cumulus Ensemble (GCE) microphysics scheme with two different options: hail and graupel. The aim of the study is to understand and describe the cause of hailstorm event during over NCR with a comparative analysis of the two options of GCE microphysics. Upon evaluating the model simulations, it is observed that the hail option shows a more similar precipitation intensity with the Tropical Rainfall Measuring Mission (TRMM) observation than the graupel option does, and it is able to simulate hail precipitation. Using the model-simulated output with the hail option; detailed investigation on understanding the dynamics of hailstorm is performed. The analysis based on a numerical simulation suggests that the deep instability in the atmospheric column led to the formation of hailstones as the cloud formation reached up to the glaciated zone promoting ice nucleation. In winters, such instability conditions rarely form due to low level available potential energy and moisture incursion along with upper level baroclinic instability due to the presence of a western disturbance (WD). Such rare positioning is found to be lowering the tropopause with increased temperature gradient, leading to winter hailstorm formation.en
dc.publisherCopernicus GmbHen
dc.relation.urlhttp://www.nat-hazards-earth-syst-sci.net/14/3331/2014/en
dc.rightsThis work is distributed under the Creative Commons Attribution 3.0 License.en
dc.titleNumerical simulation of a rare winter hailstorm event over Delhi, India on 17 January 2013en
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalNatural Hazards and Earth System Scienceen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionSchool of Environmental Sciences, Jawaharlal Nehru University, New Delhi, Indiaen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorGunturu, Udayaen
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