Regional variability in lightning activity over South Asia

Kamra, A. K.; Kumar, Pankaj

doi:10.1002/joc.6641

Cited by 17 publications

(22 citation statements)

References 74 publications

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“…It is interesting to note that during JJAS, the combined correlation coefficient over Region 2 is significantly high ( R ∼ 0.8). However, the correlation value over Region 2 is less during MAM ( R ∼ 0.42) than in the other regions, which might be related to orography, as Kamra and Ramesh Kumar (2020) highlighted. They reported that the Himalayas over the North‐West (Region 2) region play a crucial role in lightning activity due to solar heating and moisture availability.…”

Section: Resultsmentioning

confidence: 98%

Seasonal Predictability of Lightning Over the Global Hotspot Regions

Mallick

Hazra

Saha

et al. 2022

Geophysical Research Letters

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Lightning is one of the most powerful, all-pervasive atmospheric hazards. Lightning fatalities over India (Mahapatra et al., 2018; Accidental Deaths and Suicides in India (ADSI) Report, Govt. of India) result in severe societal and economic consequences as lightning affects aviation, telecommunication, agriculture, electricity, and many more sectors. Keeping in mind the lifetime injuries, physiological trauma, disabilities that are caused by lightning (e.g., Mahapatra et al., 2018;Singh and Singh, 2015), an accurate or better formulation of predicting lightning activities is of utmost significance. The major question asked here is whether the global hotspots of lightning activities across the globe are associated with the remote forcing for example, El Niño and Southern oscillation (ENSO), Pacific decadal oscillation (PDO), North Atlantic oscillation (NAO), Atlantic multidecadal oscillation (AMO), and extra tropics (ET).The seasonal forecasting of hail and tornado occurrence, which are the severe weather phenomena associated with the deep convective systems are examined over the United States of America (Elsner & Widen, 2014;Wu et al., 2011). Lightning activity is also a typical phenomenon of severe weather characterized by strong convection (van den Broeke et al., 2005), where instability, strong vertical updraft, wind shear, and availability of moisture are the primary conditions. The higher predictability of tropical climate than extra tropics was laid

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Section: Resultsmentioning

confidence: 98%

Seasonal Predictability of Lightning Over the Global Hotspot Regions

Mallick

Hazra

Saha

et al. 2022

Geophysical Research Letters

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“…Aerosol optical depth (AOD) of 550 nm with 1 • x1 • grid resolution data is retrieved from Moderate Resolution Imaging Spectroradiometer (MODIS)T(https://giovanni.gsfc.nasa.gov/giovanni)for the period 2018 -2021. More details of different region of India & World (13,15)…”

Section: Data-setsmentioning

confidence: 99%

“…CAPE is a measure of buoyancy force, which plays an important role in determining vertical updraft velocity. CAPE is dominating over the northeast region as well it is strongly impacted by the progress of the monsoon (13) . In the Himalayan region, CAPE and surface temperature are responsible for the instability (50-60 % relative humidity at 700 hpa) and lead to an ideal condition for intense lightning (14) .…”

Section: Introductionmentioning

confidence: 99%

Lightning Development over the Distinct Climate Regions of Uttarakhand, India

Gautam¹,

Singh²,

Gautam³

et al. 2023

IJST

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Objectives: Lightning activity and its connections with meteorology and aerosol loading over Uttarakhand, with varying topography and climates, is studied using ISS Lightning Imaging Sensor (LIS) aboard international space station (ISS) data during the period 2018-2021. Methods: To understand the variation of lightning activity with meteorology and aerosol loading the correlation of lightning activity with different meteorological parameters such as surface temperature, convective available potential energy (CAPE), aerosol optical depth (AOD), and convective precipitation is studied. Findings: Very poor correlation is observed between lightning flash counts with the meteorological parameters. Annual variation of lightning activity over Uttarakhand shows maximum during the monsoon season (June-September) with a peak during the pre-monsoon season (March-May) month April. The high frequency of western disturbances defined as warm low-pressure systems associated with moisture originated over Mediterranean Sea travelling from west to east across the northern states are responsible for peak lightning activity during pre-monsoon month April and maximum lightning activity in the monsoon season is attributed to the monsoon convection. Novelty: The study made the spatio -temporal variation of lightning over Uttarakhand and also reveals the connection between lightning and different meteorological parameters in different climatic conditions of Uttarakhand which is first defining the importance of large-scale meteorological processes in the development of lightning in Uttarakhand.

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“…The advection of moisture laden south‐west monsoon winds, heated land surface (Kamra & Ramesh Kumar, 2021) accompanied by strong updrafts across complex topography (Vishnu et al., 2013) are the major causes of lightning over the mesoscale mountain ranges of Western Ghats (WG). In a case study approach, Mudiar et al.…”

Section: Introductionmentioning

confidence: 99%

“…The advection of moisture laden south-west monsoon winds, heated land surface (Kamra & Ramesh Kumar, 2021) accompanied by strong updrafts across complex topography (Vishnu et al, 2013) are the major causes of lightning over the mesoscale mountain ranges of Western Ghats (WG). In a case study approach, Mudiar et al (2018) utilized lightning network observations to delineate the presence of higher concentration of bigger raindrops in strongly electrified storms owing to enhancement in collision-coalescence processes over the WG.…”

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confidence: 99%

Relationship Between Convective Storm Properties and Lightning Over the Western Ghats

Utsav

Deshpande

Das

et al. 2022

Earth and Space Science

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X‐band radar observations are integrated with lightning location network observations to investigate the relationship between convective storm properties and lightning over the Western Ghats during a monsoon season (June–September 2014). Convective storms (cells) were identified using an objective‐tracking method and instantaneous lightning strikes within the radar domain were then linked with observed storms. This spatio‐temporal sampling of individual convective cells and lightning has facilitated process‐based study of electrified convection over the Ghats for the first time. Storm and lightning occurrences are typically high during monsoon onset and withdrawal months of June and September, respectively. A spatial correspondence between deep‐intense storms, lightning, and intense convective cores indicated presence of large hydrometeors in the mixed‐phase region of storm supported by strong updrafts and is essential for lightning. The large‐scale instability that peaked during afternoon hours was a key factor in the formation of deep‐intense storms and lightning. Results show that majority of lightning‐producing storms are located on the leeward side as opposed to the windward side. These storms have deeper top‐heights, larger areas and vertically integrated liquid, and an enhanced hail probability than those devoid of lightning. Warm season convection in the study area is accompanied by the preponderance of negative Cloud to Ground (−CG) flashes over positive Cloud to Ground (+CG) lightning. Storms with +CG features exhibited much higher (>2 times) vertical airmass flux in the mid‐troposphere (6–9 km) than storms without +CG features. Furthermore, for majority of +CG storms, intracloud flash occurrences increased significantly above the freezing level.

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Regional variability in lightning activity over South Asia

Cited by 17 publications

References 74 publications

Seasonal Predictability of Lightning Over the Global Hotspot Regions

Seasonal Predictability of Lightning Over the Global Hotspot Regions

Lightning Development over the Distinct Climate Regions of Uttarakhand, India

Relationship Between Convective Storm Properties and Lightning Over the Western Ghats

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