Synoptic Analysis of Early Heat Waves in Northwest of Iran
Early heat waves are extreme events that cause heavy losses in plant and animal life and cause many social and economic problems for communities. The purpose of this study was to identify synoptic patterns and statistical analysis of preterm heat waves in northwestern Iran. To do this, the maximum d...
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Kharazmi University
2019-09-01
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| Series: | تحقیقات کاربردی علوم جغرافیایی |
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| Online Access: | http://jgs.khu.ac.ir/article-1-2780-en.pdf |
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| author | Mahmoud Hooshyar behrouz sobhani nader parvin |
| author_facet | Mahmoud Hooshyar behrouz sobhani nader parvin |
| author_sort | Mahmoud Hooshyar |
| collection | DOAJ |
| description | Early heat waves are extreme events that cause heavy losses in plant and animal life and cause many social and economic problems for communities. The purpose of this study was to identify synoptic patterns and statistical analysis of preterm heat waves in northwestern Iran. To do this, the maximum daily temperature data of March 14th was used for fourteen synoptic stations in the northwest of the country during the statistical period (1333-1393) Hijri Shamsi. Then, on the basis of the threshold, the Baldy index was selected for 61 days of heat wave. All statistical characteristics of the data were processed in SPSS software. They were The elevation data of the middle atmosphere of the atmosphere was extracted from a NCEP / NCAR database on a network with an arc 2/5 × 2/5 degree on the 0 to 70 degree eastern longitude and 0 to 60 degrees north latitude. The matrix was made up of 864 columns in 40 rows, with rows of days with thermal waves and elevation data on the columns on the middle of the atmosphere. The analysis of the basic components was performed on the algebraic data matrix matrix And 12 components that account for about 93 of the variations in pressure levels above 500 hp, were identified. To identify the coherent patterns, cluster analysis was performed on the scores of the components by the WARD integration method. Five types of pre-heat generation waveform patterns were identified. The results of this study showed that the premature heat waves in the northwest of Iran are due to high altitude formation in southern Arabia, the Aden valley and the center of Sudan at a level of 500 hpa and the formation of Sudan's low pressure in the sea level and the discharge of its tabs to the north and northeast of the region The case study (Northwest of Iran) also includes events occurring. |
| format | Article |
| id | doaj-art-5d30980c8685462eb1c850efddda18d0 |
| institution | Kabale University |
| issn | 2228-7736 2588-5138 |
| language | fas |
| publishDate | 2019-09-01 |
| publisher | Kharazmi University |
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| series | تحقیقات کاربردی علوم جغرافیایی |
| spelling | doaj-art-5d30980c8685462eb1c850efddda18d02025-01-31T17:25:38ZfasKharazmi Universityتحقیقات کاربردی علوم جغرافیایی2228-77362588-51382019-09-011954185203Synoptic Analysis of Early Heat Waves in Northwest of IranMahmoud Hooshyar0behrouz sobhani1nader parvin2 Ph.D. student of Climatology, University of Mohaghegh Ardabili and faculty member of Payame Noor University, Mahabad, Iran. Associate Professor, Department of Geography, University of Mohaghegh Ardabili, Ardebil, Iran. Assistant Professor of Climatology, Payame Noor University, Urmia, Iran. Early heat waves are extreme events that cause heavy losses in plant and animal life and cause many social and economic problems for communities. The purpose of this study was to identify synoptic patterns and statistical analysis of preterm heat waves in northwestern Iran. To do this, the maximum daily temperature data of March 14th was used for fourteen synoptic stations in the northwest of the country during the statistical period (1333-1393) Hijri Shamsi. Then, on the basis of the threshold, the Baldy index was selected for 61 days of heat wave. All statistical characteristics of the data were processed in SPSS software. They were The elevation data of the middle atmosphere of the atmosphere was extracted from a NCEP / NCAR database on a network with an arc 2/5 × 2/5 degree on the 0 to 70 degree eastern longitude and 0 to 60 degrees north latitude. The matrix was made up of 864 columns in 40 rows, with rows of days with thermal waves and elevation data on the columns on the middle of the atmosphere. The analysis of the basic components was performed on the algebraic data matrix matrix And 12 components that account for about 93 of the variations in pressure levels above 500 hp, were identified. To identify the coherent patterns, cluster analysis was performed on the scores of the components by the WARD integration method. Five types of pre-heat generation waveform patterns were identified. The results of this study showed that the premature heat waves in the northwest of Iran are due to high altitude formation in southern Arabia, the Aden valley and the center of Sudan at a level of 500 hpa and the formation of Sudan's low pressure in the sea level and the discharge of its tabs to the north and northeast of the region The case study (Northwest of Iran) also includes events occurring.http://jgs.khu.ac.ir/article-1-2780-en.pdfearly heat wavesbaldy indexbase componentclusteringnorthwest of iran |
| spellingShingle | Mahmoud Hooshyar behrouz sobhani nader parvin Synoptic Analysis of Early Heat Waves in Northwest of Iran تحقیقات کاربردی علوم جغرافیایی early heat waves baldy index base component clustering northwest of iran |
| title | Synoptic Analysis of Early Heat Waves in Northwest of Iran |
| title_full | Synoptic Analysis of Early Heat Waves in Northwest of Iran |
| title_fullStr | Synoptic Analysis of Early Heat Waves in Northwest of Iran |
| title_full_unstemmed | Synoptic Analysis of Early Heat Waves in Northwest of Iran |
| title_short | Synoptic Analysis of Early Heat Waves in Northwest of Iran |
| title_sort | synoptic analysis of early heat waves in northwest of iran |
| topic | early heat waves baldy index base component clustering northwest of iran |
| url | http://jgs.khu.ac.ir/article-1-2780-en.pdf |
| work_keys_str_mv | AT mahmoudhooshyar synopticanalysisofearlyheatwavesinnorthwestofiran AT behrouzsobhani synopticanalysisofearlyheatwavesinnorthwestofiran AT naderparvin synopticanalysisofearlyheatwavesinnorthwestofiran |