500 HPA MAP PATTERNS ASSOCIATED WITH LOW PRECIPITATION YEARS IN IRAN

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ATAEI H.

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Journal: Geography and Environmental Planning Year:2009 | Volume:20 | Issue:1 (33) Page(s): 43-58

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Title

500 HPA MAP PATTERNS ASSOCIATED WITH LOW PRECIPITATION YEARS IN IRAN

Author(s)

ATAEI H. | Issue Writer Certificate

Keywords

MAP PATTERNQ2

LOW PRECIPITATIONQ2

IRANQ3

PCAQ3

GEOPOTENTIAL HEIGHTQ2

Abstract

Synoptic climatology studies the relationships between the atmosphere circulation and the surface environment of a region. This study was done during LOW PRECIPITATION years in IRAN (1983, 1985, 1987, 1989, 1990, and 1999). In order to explore the spatial and temporal variation of 500hpa flow patterns and their relationship with the precipitation of IRAN , daily GEOPOTENTIAL HEIGHTs for the region 0° E to 70° E and 10° N to 60° N, at 2.5 degree resolution, were analysis. A PCA analysis of GEOPOTENTIAL HEIGHTs in S-mode showed that there are seven significant MAP PATTERNs. These are explaining about 93 percent of variance. The 1st of MAP PATTERNs (MP1) represents latitude flow and 2,4,5,6 and 7 patterns determine ridge over IRAN. Flow patterns lead air masses toward IRAN which the causes LOW PRECIPITATION of the country.

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APA: Copy

ATAEI, H.. (2009). 500 HPA MAP PATTERNS ASSOCIATED WITH LOW PRECIPITATION YEARS IN IRAN. GEOGRAPHY AND ENVIRONMENTAL PLANNING (UNIVERSITY OF ISFAHAN), 20(1 (33)), 43-58. SID. https://sid.ir/paper/153158/en

Vancouver: Copy

ATAEI H.. 500 HPA MAP PATTERNS ASSOCIATED WITH LOW PRECIPITATION YEARS IN IRAN. GEOGRAPHY AND ENVIRONMENTAL PLANNING (UNIVERSITY OF ISFAHAN)[Internet]. 2009;20(1 (33)):43-58. Available from: https://sid.ir/paper/153158/en

IEEE: Copy

H. ATAEI, “500 HPA MAP PATTERNS ASSOCIATED WITH LOW PRECIPITATION YEARS IN IRAN,” GEOGRAPHY AND ENVIRONMENTAL PLANNING (UNIVERSITY OF ISFAHAN), vol. 20, no. 1 (33), pp. 43–58, 2009, [Online]. Available: https://sid.ir/paper/153158/en

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