Assessment of Convective Activity Using Stability Indices as Inferred from Radiosonde and MODIS Data

Jayakrishnan, P. R.; Babu, C. A.

doi:10.4236/acs.2014.41014

Cited by 13 publications

(11 citation statements)

References 16 publications

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“…Radio soundings [12] are used to obtain vertical profiles of thermodynamic (pressure, Figure 1. Map of the study area.…”

Section: Methodsmentioning

confidence: 99%

Meteorological Indices Approach for Prediction of Thunderstorm Probability at Two Coastal Sites in Egypt

Ahmed¹,

Sadek²

2015

ACS

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Siting of hazardous facilities such as Nuclear power plants requires the investigation of the meteorological and climatologically of the site region to derive extreme values of the meteorological variables to be considered in the design for safety purposes. Not only normally occurring meteorological conditions but also extremely rare events are considered. The present work is devoted to predict the likelihood of the Thunderstorm which is one of the rare events of concern for plant safety. Four atmospheric stability indices such as K-indices, the Showalter-indices, total totalsindices and the SWEAT-indices have been used for that. These function of meteorological parameters such as temperature, wind speed, wind direction and dew point at levels of pressure at 500, 700 and 850 hpa to predict the thunderstorm probability. Two Egyptian coastal sities have been chosen for the investigation, one on the Mediterranean Sea and the other on Red Sea; El Sallum and Sharm El Sheikh. The results show that the probability of thunderstorm occurred within the months January and February during 1989-2003, where the maximum value of SI, K, TT and

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“…Radio soundings [12] are used to obtain vertical profiles of thermodynamic (pressure, Figure 1. Map of the study area.…”

Section: Methodsmentioning

confidence: 99%

Meteorological Indices Approach for Prediction of Thunderstorm Probability at Two Coastal Sites in Egypt

Ahmed¹,

Sadek²

2015

ACS

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“…The total totals index is obtained by the union of the vertical totals and cross totals, discussed below [6] Cross totals, CT = Td850 -T500 Vertical totals, VT = T850 -T500 Total totals, TT = CT + VT = T850 + Td850 -2T500…”

Section: (2) Total Totals Index (Tti)mentioning

confidence: 99%

“…Lifted index (LI) = T 500 -T parcel When LI values are lower than -4 K then there will be higher chance for severe convective thunderstorms. (4) Convective available potential energy (CAPE): CAPE is calculated by the formula shown below [9], [6] Where and stands for the virtual temperature of the parcel and environment respectively. and are the levels of free convection and neutral buoyancy.…”

Section: ) Lifted Index (Li)mentioning

confidence: 99%

“…Relative humidity: This is related to amount of moisture present in the atmosphere. These play crucial role in thunderstorm occurrence [1][2][3][4][5][6][7][8][9][10][11]. According to a report from National Oceanic and Atmospheric Administration (NOAA), 16-million thunderstorms are observed every year across the globe [12].…”

Section: Introductionmentioning

confidence: 99%

“…Research by [7], [2] on lightening showed the usage of TRMM-LIS data for studying the lightning and thunderstorms. Jayakrishnan and Babu (2014) [6] used the MODIS satellite derived stability indices such as K Index (KI) , Lifted Index (LI), Total Totals Index (TTI) to identify their thresholds for convective formation over south peninsular India. In addition to MODIS satellite I have tried to use INSAT-3D satellite.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Atmospheric Stability Indices on Convective Systems Over India and Srilanka

Umakanth*,

Satyanarayana,

Simon

et al. 2019

IJRTE

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Thunderstorms are real-time global phenomena, as their occurrence can take place at anytime at any place. Though their duration is less when compared to large scale processes, their damage is devastating to human life. Thunderstorms are linked with damage factors such as lightning, damaging wind, hails and rain. Real-time satellite data provide atmospheric data which is useful for prediction of thunderstorms. In this paper, an attempt is made to analyze the statistical based stability indices from INSAT-3D, MODIS and ECMWF satellites for the now casting of thunderstorms. The occurrences of severe thunderstorms over India and Srilanka during the month of October 2013, 2014 and 2015 have been analyzed. In these three years, five severe thunderstorm cases were identified using Insat-3D cloud images and thunderstorm reports. Atmospheric stability indices such as K Index (KI), Lifted Index (LI), Total Totals Index (TTI), Total Precipitable water (TPW), Humidity Index (HI) related with severe convection system over India and Srilanka during October month were identified to provide guidance for the study of convection and thunderstorm activity. These indices give us a clear indication of development of convective system before 3 to 4 hours. Results of this study indicate the importance of satellite data for studying the development and decay of convective systems

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Variability and trends of annual and seasonal thunderstorm frequency over Bangladesh

Saha

Quadir

2016

Intl Journal of Climatology

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ABSTRACT:The climatology of thunderstorm (TS) activities over Bangladesh has been investigated using monthly, seasonal, and annual time series data of 29 meteorological stations in the country for a maximum period of 35 years . The climatology of the TS and its inter-annual variability and trends have been investigated using country average as well as station-wise data. The results of the trend analysis show that the country average TS frequency exhibits statistically significant trends for annual and seasonal data, except for winter. The monthly TS frequency shows significant increasing trends for the months April-November. The station-wise analysis of annual and seasonal data shows dominant increasing trends over the country, with a few stations having negative trends. The correlation coefficients of the time series of seasonal and annual TS frequency with rainfall and minimum and maximum temperature have been computed. Also, the composite climatology of geopotential height and temperature fields of the troposphere covering Bangladesh and its surrounding areas for the month of May individually for the years with high TS frequency and low TS frequency has been presented and analysed. The low level moisture and meridional component of wind fields have also been considered. Additionally, the correspondence of TS frequency for this month with the low level vertical wind shear (VWS) between 850 and 500 hpa levels for the u-component of the wind has also been studied using the data of 1976-2010, which shows that the TS frequency is correlated with VWS.

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Assessment of Convective Activity Using Stability Indices as Inferred from Radiosonde and MODIS Data

Cited by 13 publications

References 16 publications

Meteorological Indices Approach for Prediction of Thunderstorm Probability at Two Coastal Sites in Egypt

Meteorological Indices Approach for Prediction of Thunderstorm Probability at Two Coastal Sites in Egypt

Impact of Atmospheric Stability Indices on Convective Systems Over India and Srilanka

Variability and trends of annual and seasonal thunderstorm frequency over Bangladesh

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