Severe local convective storms in Bangladesh: Part II.

Yamane, Yusuke; Hayashi, Taiichi; Dewan, Ashraf; Akter, Fatima

doi:10.1016/j.atmosres.2009.11.003

Cited by 29 publications

(39 citation statements)

References 13 publications

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“…The NCEP FNL data at 00 UTC were used in this study because the results of Yamane et al (2010b) are based on rawinsonde data at 00 UTC at Dhaka produced by the Bangladesh Meteorological Department (BMD) (Rawinsonde observation data of BMD are available at only 00 UTC). The major purpose of this study was to clarify synoptic spatial situations leading to characteristics of composite soundings on SLCSD shown in Yamane et al (2010b). Therefore, this study also focused on the data at 00 UTC.…”

Section: Methodsmentioning

confidence: 99%

“…In particular, we focus on factors of synoptic meteorological fields leading to features of composite soundings on the days of SLCS shown in Yamane et al (2010b) and attempt to promote the results shown in Yamane et al (2010b). We compared composite meteorological fields on the day with reports of SLCS to those on the days without reports of SLCS to clarify the synoptic situations of SLCS.…”

Section: Introductionmentioning

confidence: 99%

“…Yamane et al (2010b) show the characteristics of environmental conditions of SLCS during the pre-monsoon season based on comparison of composite soundings at Dhaka (90.3°E 23.7°N) on days with reports of SLCS with those on days without reports of SLCS. They indicated intensification of southerly wind and increasing of water vapour around the level of 500 m above ground level (AGL), rising of temperature around the level of 2 km AGL and dropping of temperature around 726 Y.…”

Section: Introductionmentioning

confidence: 99%

“…To better understand the mechanism and improve the prediction of SLCS, clarifying synoptic situations in which SLCS is generated is important. Therefore, this study attempts to clarify synoptic spatial situations accompanied by the characteristics of composite soundings associated with severe local convective storm days (SLCSD) during the pre-monsoon season shown in Yamane et al (2010b).…”

Section: Introductionmentioning

confidence: 99%

“…YAMANE et al the level of 5 km AGL, and these conditions produce great potential instability favourable for outbreaks of SLCS. Yamane et al (2010b)'s research was based on rawinsonde data at one point in Dhaka and did not show a synoptic meteorological setting leading to the characteristics of composite soundings associated with outbreaks of SLCS. To better understand the mechanism and improve the prediction of SLCS, clarifying synoptic situations in which SLCS is generated is important.…”

Section: Introductionmentioning

confidence: 99%

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Synoptic situations of severe local convective storms during the pre‐monsoon season in Bangladesh

Yamane

Hayashi

Kiguchi

et al. 2012

Intl Journal of Climatology

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This study examines synoptic situations of severe local convective storms (mesoscale severe weather associated with deep convections such as tornado and hail) during the pre-monsoon season (from March to May) in Bangladesh. We compared composite meteorological fields on severe local convective storm days (SLCSD) with those on non-severe local convective storm days (NSLCSD). Moisture inflow from the Bay of Bengal is enhanced with intensification of southwesterly wind at 950 hPa on SLCSD compared with NSLCSD. The temperature is higher at 800 hPa over the inland area of the Indian subcontinent including Bangladesh on SLCSD than NSLCSD. At 550 hPa, a trough over Bangladesh develops on SLCSD compared with NSLCSD. This leads to the development of a thermal trough over the inland area of the Indian subcontinent and enhancement of cold advection from the northwest into Bangladesh on SLCSD at this level. This synoptic situation produces great potential instability of the atmosphere in Bangladesh on SLCSD during the pre-monsoon season. Composite distributions of lifted index, precipitable water and convective available potential energy on SLCSD and NSLCSD over south Asia show distinct differences of these parameters between these two categories with statistical significance especially in and around Bangladesh. These differences indicate that the atmospheric environment has great potential instability especially in and around Bangladesh on SCLSD under the synoptic situations shown in this study.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Synoptic situations of severe local convective storms during the pre‐monsoon season in Bangladesh

Yamane

Hayashi

Kiguchi

et al. 2012

Intl Journal of Climatology

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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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Study of Severe Thunderstorms over Bangladesh and Its Surrounding Areas During Pre-monsoon Season of 2013 Using WRF-ARW Model

Mannan¹,

Ahasan²,

Alam³

2014

High-Impact Weather Events Over the SAARC Region

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Severe local convective storms in Bangladesh: Part II.

Cited by 29 publications

References 13 publications

Synoptic situations of severe local convective storms during the pre‐monsoon season in Bangladesh

Synoptic situations of severe local convective storms during the pre‐monsoon season in Bangladesh

Variability and trends of annual and seasonal thunderstorm frequency over Bangladesh

Study of Severe Thunderstorms over Bangladesh and Its Surrounding Areas During Pre-monsoon Season of 2013 Using WRF-ARW Model

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