Applied Research in Geographical Sciences

Applied Research in Geographical Sciences

Considering the nature and structure of atmospheric weathering while the occurrence of daily dry periods in west and northwest of Iran

Authors
hossein Mir Mousavi 1
Masoud Jalali 2
enayet asadolahi 3
1 Associate Professor of Climatology and Faculty Member of Zanjan University, Iran.
2 Associate Professor, Department of Climatology and Faculty Member, Zanjan University, Iran
3 Master of Synoptic Climatology, Zanjan University, Iran
10.52547/jgs.21.63.233
Abstract
In this research, coding the rainfalls, prepares daily 45 stations with the statistical period of 20 years to zero and one codes to realize the daily dry periods in west and north west of the country and then, by establishing the main condition of occurrence of code one for 30 stations, we extracted the dry 4 to 10-day frequencies. And the results gained of considering the atmospheric weathering, shows that the most clear rotational pattern in sea level is related to Siberia-Europe high-pressure panels and sometimes both of them that increase the rotation on the region and also, the local high-pressure reinforcement and there is a high altitude in atmospheric middle level which is derived from sample patterns and is placed on the studied region and these sample patterns are from omega, bi-polar and rex models that they are on Russia and Scandinavian countries with some changes. The 500 level TAVA and omega shows well that in most regions, the air course, has decreasing case and so, we can result that placement of a high altitude in atmospheric middle and upper level on the high-pressures of the earth, causes the weather stability and lack of rainfall and as a result, the stability and durability of these conditions for several days, is related to sample patterns.
Keywords
cluster analysis
daily dry periods
west and northwest of Iran
Bandal patterns structure of atmospheric
Gidey, E., Dikinya, O., Sebego, R., Segosebe, E., and Zenebe, A. 2018. Modeling the Spatio-Temporal Meteorological Drought Characteristics Using the Standardize PrecipitationIndex (SPI) in Raya and Its Environs, Northern Ethiopia, Earth Systems and Environment, 1-12.

Van Der Linden, R., Fink, A.H., Phan- Van, T., and Trinh-Tuan, L. 2016. Synoptic-dynamic analysis of early dryseason rainfall events in the Vietnamese central highlands. Monthly Weather Review, 144(4): 1509-1527.

Castro.F.D, J.I.Santisteban, M.Barriendos, R.Mediavilla, (2008), Reconstruction of Drought Episodes for Central Spain from Rogation Ceremonies Recorded at the Toledo Cathedral from 1506 to 1900 A Methodological Approach. Global and Planetary Change, 63, 230-242.
Girardin, M. P., Tardif, J. C., Flannigan, M. D., & Bergeron, Y. (2006). Synoptic-Scale Atmospheric Circulation and Boreal Canada Summer Drought Variability of The Past Three Centuries. Journal of Climate, 19(10), 1922-1947.
Herrera, R.G., Paredes, D., Trigo, R.M., Trigo, I.F., Hernandez, E., Barriopedro, D and Mendes, M., (2007). The outstanding2004/5 drought in the Iberian peninsula: associated atmospheric circulation, American meteorological society,8: 483-498.
Karaca, M., D eniz, A., Tayanc, M., (2000), Cyclon track variability over Turkey in association with regional, international journal of climatology, 20:1225-1236.
Parry, S., Prudhomme, C., Hannaford, J., & Lloyd-Hughes, B. (2010). Examining The Spatio-Temporal Evolution and Characteristics of Large-Scale European Droughts. In Proceedings of The BHS Third International Symposium. British Hydrological Society,135-142.
Rimkus , E., Kazys, J., Valiukas, D., & Stankūnavičius, G.(2014). The Atmospheric Circulation Patterns During Dry Periods in Lithuania. Oceanology, 56(2) ,223-239.
Tran.L, C.G.Knight, V.Wesner, (2002), Drought in Bulgaria and Atmospheric Synoptic Conditions over Europe. GeoJournal, 57, 149-15