Paper Titles in Periodical
International Letters of Social and Humanistic Sciences
Volume 61

Subscribe

Subscribe to our Newsletter and get informed about new publication regulary and special discounts for subscribers!

ILSHS > Volume 61 > Synoptic Pattern of Deep Trough Led to Strong...
< Back to Volume

Synoptic Pattern of Deep Trough Led to Strong Winds of Zab Basin in Iran

Full Text PDF

Abstract:

One of the most important natural disasters are storms that each year, causing financial losses and Johnny are Frequency. Sometimes damage to the extent that the economic system, social disrupts a country. The aim of this study is to analyze the synoptic conditions of severe storms is Zab basin. In this study, given the scale of temporal and spatial distribution, wind speed and comprehensiveness of the three threshold size and calculate the 90th percentile wind speed, Forty days pervasive and severe storms were selected. Sea level pressure data and the elevation data of 500hp level from the database NCEP/NCAR were extracted. Matrix was formed that storm was on the rows and elevation data middle levels of the atmosphere, was on the columns. Then, principal components that explain the variation in height level pressure hp500 were identified. To identify synoptic patterns, cluster analysis integration "ward's" was performed on these components.The results showed that five synoptic pattern of atmospheric middle level, in the form of three major causes of severe storms in the Zab River Basin: Cut off low pattern, Shallow trough pattern of long wave and deep trough pattern of short wave. The most frequent traffic synoptic pattern of a synoptic pattern of middle levels and 60% of the patterns assigned to itself, causing severe storms in the Zab River Basin. Irregularities in the movement and position of the polar vortex caused the jet stream and storm paths meridian winds greater control and troughs are driven towards the low latitudes deeper. Because of the special arrangement of relatively strong and contrasting surface synoptic, the pressure gradient and energy exchange at its maximum reached compression Isobaric lines and as a result, Strong winds in the catchment area level has been created.

Info:

Periodical:
International Letters of Social and Humanistic Sciences (Volume 61)
Pages:
46-52
DOI:
https://doi.org/10.18052/www.scipress.com/ILSHS.61.46
Citation:
E. A. Asheri and N. Parvin, "Synoptic Pattern of Deep Trough Led to Strong Winds of Zab Basin in Iran", International Letters of Social and Humanistic Sciences, Vol. 61, pp. 46-52, 2015
Online since:
Oct 2015
Authors:
Emam Ali Asheri, Nader Parvin
Keywords:
Strong Winds, Synoptic Pattern, Trough, Zab Basin
Export:
RIS, BibTeX, Text
Distribution:
Open Access

Creative Commons License
This work is licensed under a
Creative Commons Attribution 4.0 International License

References:

[1] Asadi, M. Entezari, A.R. and Akbari, E., (1392), locating wind farms in the North East of the country using the AHP and GIS, Geographical Studies of Arid, 14: 11-29‏.

[2] Barati, G.H. and Ashori, F., (1386), Trahyalgvhay synoptic strongest winds of the southern shore of the Caspian Sea during the years (88-1366), Geographical Research, 62: 80-67‏.

[3] Jahangir, Z. Rahimzadeh, F. Kamali, G.A., (1384), wind energy calculation using the two-parameter Weibull distribution, Geographical Research Quarterly, 76: 170-151‏.

[4] Hosseini, S.B., (1379), synoptic study of severe storms in Tehran, Master Thesis, Geography, Faculty of Natural Resources, Tarbiat Modarres University‏.

[5] Halabian, A. and Hosein Ali Pvrjzy, F., (1393), Analysis of the frequency of extreme rainfall events associated with the jet stream and the western shores of the Caspian inclusive, Geographical Research, 112: 220-205‏.

[6] Zolphaghari, M., (1383), the synoptic pattern winds with speed more than 36 km per hour in Qom to predict the time that, the Management and Planning Organization of Qom, 326‏.

[7] Zolfagari, H. Masvmpor Smakosh, J. Shayeghan mehr, S. and Ahmadi, M., (1390), The Synoptic dust storms in western regions of Iran during the years 88-1384 (Case Study rising tide of July 1388), Journal of Geography and Program 43: 34-17‏.

[8] B. Rezaei Banafshah, M. Jahanbakhsh, S. Dinpaghoh, J. and Ismailpor, M., (1393), the feasibility of using wind power in the province of Ardabil and Zanjan, Geography Research, Volume 46, 3: 261-274‏.

[9] Abedzadeh, H., (1384), analyzes dust systems in the West, Supervisor Hassan Zolfaghari, Tarbiat Modarres University, 116‏.

[10] Alamdari, P, Nehmatollahi, O. Mirhoseini, S.M. Rajabi, A.A.A., (1390), The potential of wind energy in this province for the construction of wind power plants, Proceedings of the First International Conference on Emerging Trends in energy conservation Tehran , 30-29 November‏.

[11] Kamijani, F. Nasrollahi, A. Shaherzad, N. and Nazari, N., (1391), Analysis of the northern coast of Persian Gulf wind pattern based on systematic winds, the sea breeze and land breeze, Proceedings of the Tenth International Conference on Coasts, Ports and Offshore, 29 November to 1 December 1391, Tehran Olympic Hotel‏.

[12] Marjani, S.S., (1372), The synoptic winds over 15 meters per second (storm) in Khorasan" MS Thesis Ecology and Tehran University, s Geophysics Institute‏.

[13] Abatzoglou, J.T., Barbero, R., and Nauslar, J.N., (2013), Diagnosing Santa Ana Winds in Southern California with Synoptic-Scale Analysis, Wea. Forecasting, 28: 704–710.

DOI: https://doi.org/10.1175/waf-d-13-00002.1

[14] Oltmanns, M., Straneo, F., Moore, G.W.K., Mernild, S.H. (2014), Strong Downslope Wind Events in Ammassalik, Southeast Greenland, Journal of Climate, 27: 977-993.

DOI: https://doi.org/10.1175/jcli-d-13-00067.1
Show More Hide