List of Articles thunderstorm

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  1 - Temporal and spatial analysis of thunderstorms in southwestern Iran
  asal falak Reza Borna farideh asadian
  One of the most important factors influencing human life is the weather. The aim of this study was to investigate the spatial temporal features of the occurrence of thunderstorms in the southwest of the country. States (Khuzestan, Chaharmahal Bakhtiari, Kohkiluyeh and B More

  One of the most important factors influencing human life is the weather. The aim of this study was to investigate the spatial temporal features of the occurrence of thunderstorms in the southwest of the country. States (Khuzestan, Chaharmahal Bakhtiari, Kohkiluyeh and Boyer-Ahmad) During a statistical period from 1985 to 2015, And then the analysis of the synoptic conditions of the thunderstorms obtained from the synoptic stations of the region. The results of the annual analysis of the frequency of thunderstorms at Dezful station with 479 phenomena and Ramhormoz with 252 events have recorded the lowest in the stations. And in the seasonal analysis, the highest hurricane occurred in the spring with the number of 137 and in the summer with the lowest storm with the number 10. In the monthly analysis of the frequency of thunderstorms, April was the most 75 days and August was the least with 2 days. In terms of the frequency of thunderstorms during the eight-hour observation period, the highest frequency of the thunderstorm is 12 o'clock (3.30 o'clock). Manuscript profile
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  2 - The Application of Digital Atmosphere 2000 Software in Spatial Analysis of Climatic Features in Iran
  M.A khorshid-Doost یوسف Ghavidel
  Features such as thunderstorms and dust storms, foggy, snowy, and rainy days alongwith days containing frozen rainfalls have occupied great importance in fields likeagriculture, transportation, health, and environment. In this paper some abilities ofDigital Atmosphere s More

  Features such as thunderstorms and dust storms, foggy, snowy, and rainy days alongwith days containing frozen rainfalls have occupied great importance in fields likeagriculture, transportation, health, and environment. In this paper some abilities ofDigital Atmosphere software have been used in a spatial analysis of some of theabove-mentioned climatic features of Iran. The results indicate differences in spatiotemporaldistribution of the factors under study. Thunderstorms take a higher positionamong climatic elements studied, and the greatest spatial changes belong to the type ofdust storm distribution patterns. Manuscript profile
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  3 - Synoptic Analysis of Mashhad Severe Thunderstorms
  framarz khoshakhlagh mohammad hasan mahoutchi
  10.22034/jest.2020.31009.3947
  Introduction: Thunderstorms are one of the most destructive weather phenomena, and knowing the mechanism, development, and development of such storms can be of particular help in counteracting and mitigating the damage. Methodology: In the present study, thunderstorms More

  Introduction: Thunderstorms are one of the most destructive weather phenomena, and knowing the mechanism, development, and development of such storms can be of particular help in counteracting and mitigating the damage. Methodology: In the present study, thunderstorms with rainfall of more than 10 mm of Mashhad synoptic station in a 61-year statistical period (2010-1901) have been investigated. Thus, first the codes related to the occurrence of the thunderstorm phenomenon and then the precipitation of more than 10 mm related to the mentioned phenomenon were extracted and then the daily data of the average sea level pressure from the series of retrieved data series. NCEP / NCAR were harvested within 12 days. Finally, with the method of basic component analysis (PCA) and cluster analysis, sea level rotation patterns that played a role in the formation of thunderstorms were classified. Results and Discussion: The study showed that thunderstorms of the Mashhad region, has been created by two general patterns. The first pattern, in the SLP, formed the cell of the monsoon system over the country advocated hot and humid air needed for thunderstorm by motion of cyclonic and at the upper levels (850 and 500 hpa) the trough of westerly winds is located over the studied area that led to the thunderstorms occurrence. In The second pattern, the Sudan system expanded from southwest toward northeast and then passed over the Persian Gulf and the Sea of Oman, that led the humid advection into the study area and at the upper levels (850 and 500 hpa) trough of westerly winds is located over the studied area that provided dynamic rise and consequently led to thunderstorms. In both precipitation pattern, main source of moisture was the South Seas and the major factor of uplifting was the western trough. Manuscript profile
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  4 - Statistical analysis Synoptic Thunder storms Kohgiluyeh and Boyer Ahmad
  Hasan Lashkari Zahra Yarmoradi Hasan Mousavi
  negative and harmful actions damaged by natural disasters caused by climate change has been struggling.The most frequent and severe thunderstorms this type of risk is that a lot of products each year Agricultural production facility construction, many areas of the world More

  negative and harmful actions damaged by natural disasters caused by climate change has been struggling.The most frequent and severe thunderstorms this type of risk is that a lot of products each year Agricultural production facility construction, many areas of the world, causing human casualties And every year in our country's strength and weakness that we experience with this phenomenon. Kohgiloyeh due to the mountainous area of opportunity for the intensification and expansion of thunder storms is. n this study, severe thunder storms to explore Kohgiluyeh Boyer Ahmad, the code related to the storm Tndrydr period 1990 to 2010 the country was extracted Meteorological Organization. The sea level pressure data, geopotential height, humidity and omega of databases NCEP / NCAR downloaded software were traced GRADS. Finally, 70 of thunderstorms to investigate the source of moisture and synoptic factors causing these storms were selected and evaluated. The most severe cases were selected according to the criteria described in full detail. The results showed that the cause of the Thunder, the Sudanese system. Due to potential high humidity (due to the formation of the next hot water on the equator) and receive ample moisture from the warm seas of Oman and the Arabian and Red Sea are high potential energy. As a result of the release of considerable heat Badrrvy severe thunder storms on the province. It should be noted that the topography of the region in strengthening and intensification of these storms has been ineffective Manuscript profile
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  5 - Statistical analysis and synoptic spatial and temporal patterns of precipitation Chance of Thunderstorm (Case study: Zanjan)
  Abdullah faraji Mehdi Doostkamian Zahra safari
  Thunderstorm a weather phenomenon that due accompanied by thunder, lightning, wind and rain, intense search in addition to the positive impact that they can cause a lot of damage in different parts of the world. Due to the variety of weather conditions, the occurrence o More

  Thunderstorm a weather phenomenon that due accompanied by thunder, lightning, wind and rain, intense search in addition to the positive impact that they can cause a lot of damage in different parts of the world. Due to the variety of weather conditions, the occurrence of this phenomenon is observed in different regions. North West of the province, especially not immune from this phenomenon. To study the phenomenon in terms of statistical and synoptic data daily thunderstorms Thunder in the province of Zanjan synoptic stations in a 16-year period (2009-1994) were used. The results of this study showed that the average frequency of precipitation Thunder northern parts of eastern, central and south of the province with the highest coefficient of variation are also based on these areas. The eastern and western parts of the province had the lowest average and the lowest coefficient of variation Thunder also have. With this interpretation in the months of March and April are the months of heat transfer (Spring), are due to the warming of the Earth's surface and lower layers of the atmosphere (the rise of the sun during the day and close to the vertical) and high atmospheric moisture, instability and flow convection intensified under the right conditions, convective clouds grow and so will thunderstorms. Cold transitional season (autumn) also Frat cool air from higher latitudes to the southern temperate zones than the underlying causes of instability are required. However, due to the lower humidity in the fall than in the spring, the intensity of thunderstorms in the spring and autumn much less. Analysis results show weather maps at different levels-the most important synoptic systems represent the region on the tab of Mediterranean and the Black Sea and the Mediterranean and Red Sudanese have strengthened the role of the North West the country and the province. West winds around the landing position with the main cause of instability in the region Low pressure cut off by severe thunderstorms in the province. Manuscript profile
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  6 - Analysis Time - Place Annually Thunder Storms Tehran Province
  Mahmoud Ahmadi Yosouf Ghavidel Rahimi Mohadaseh Janesari
  The purpose of the present study was to identify the characteristics of temporal and spatial distribution of climatic phenomena are thunderstorms. Therefore, for the purpose of data on the frequency of thunderstorms in Tehran province with emphasis on temporal and spati More

  The purpose of the present study was to identify the characteristics of temporal and spatial distribution of climatic phenomena are thunderstorms. Therefore, for the purpose of data on the frequency of thunderstorms in Tehran province with emphasis on temporal and spatial characteristics 7 state on thunderstorms were studied and analytically considered. The results showed the highest frequency of thunders toms in theyear2004 and the lowest frequency of occurrencewasin 2000; Mehrabad station and Chet garmostregions have had the lowest volatility during the period. Oscillating and linear trend and polynomial models when all stations except CHITGAR and geophysics has been an increasing trend. Maps of the spatial distribution and spatial patterns howled that Abali and Firoozkooh the higher stand lowest frequency geophysical thunder storms between stations in the period studied Manuscript profile
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  7 - Study of intensity, duration and type of flood mechanism thunderstorm by using Tabriz radar images
  F. Arkian M. Karimkhani P.S. Katiraie
  In recent years, flood producing thunderstorms have caused flood with severe human and financial damage in northwestern Iran, especially eastern Azarbaijan. In this research, we tried to obtain new and more accurate methods for acquiring knowledge about thunderstorms ty More

  In recent years, flood producing thunderstorms have caused flood with severe human and financial damage in northwestern Iran, especially eastern Azarbaijan. In this research, we tried to obtain new and more accurate methods for acquiring knowledge about thunderstorms types. According to the weather reports, the data set containing five flood cases with twenty precipitable cells have been extracted in the area covered by Tabriz radar. Radar maximum reflectivity and its vertical cut products are used for detecting type, duration and intensity of thunderstorms. In addition, by using upper air data from sounding and General Forecast System (GFS) data with resolution of 0.5° × 0.5°, some instability indices such as K index, Showalter index, Total-Total index, Convective Available Potential Energy (CAPE), Bulk Richardson Number (BRN), Helicity, Energy – Helicity index, Vertical wind shear and precipitable water have been investigated. Results showed that the most flood producing thunderstorms were Single cell or Multi cells which after their movement and merging together, formed complex cells. Manuscript profile