Synoptic and Dynamic Analysis of Heavy Rainfall Events in the Southern Coastal Caspian Sea In Comparison With Iran Case Study (1381/9/15-1381/9/20)
This research, one of the most covering rainfall times (from1381/8/6 to 1381/10/5) in Iran study and then synoptic and dynamic analysis of it's the heaviest rainfall cluster (from 1381/9/15 to 1381/9/20) explain using environmental to circulation pattern method. In this time more than 60% of Ir...
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| Format: | Article |
| Language: | fas |
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University of Tabriz
2012-11-01
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| Series: | نشریه جغرافیا و برنامهریزی |
| Subjects: | |
| Online Access: | https://geoplanning.tabrizu.ac.ir/article_47_080f0b2a08f0c884bb746d631a97db44.pdf |
| _version_ | 1797256964946788352 |
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| author | Hamid Noori Alireza Yildroomi |
| author_facet | Hamid Noori Alireza Yildroomi |
| author_sort | Hamid Noori |
| collection | DOAJ |
| description | This research, one of the most covering rainfall times (from1381/8/6 to 1381/10/5) in Iran study and then synoptic and dynamic analysis of it's the heaviest rainfall cluster (from 1381/9/15 to 1381/9/20) explain using environmental to circulation pattern method. In this time more than 60% of Iran stations experienced rainfall and also, the number of heavy rainfall events were recorded in the southern coastal Caspian see. After drawing of Isorain maps in studied days, rain maximum points and its gravity centers calculated. Then, pressure surface patterns, geopotential, humidity advection, front, jet stream and Q-vector maps were drawn in different levels. Analysis of pressure of see level maps showed that pressure gradient reinforcement between Black see high pressure and Mediterranean low pressure and between Black see high pressure and the eastern north of Caspian sea low pressure are effective to produce these heavy rainfalls in west, southern west of Iran and the southern coastal Caspian sea. Maps geopotential showed that there are two main patterns in this studied time, as role of the eastern north of Caspian Sea trough (part of long through of Mediterranean) is very important. Analysis of humidity advection maps showed that Mediterranean sea and Red sea in upper levels and Persian Golf and Oman sea in lower levels are sources of humidity for heavy rainfalls, as them role in different days aren’t alike. However, heavy rainfall events in the southern coastal Caspian sea were provided via Mediterranean sea in 500(ha) level, Mediterranean sea and Red sea in 600 and 700 (ha) levels and all of main sources of humidity (Black sea, Mediterranean sea, Persian Golf, Red sea and Caspian sea). Polar front, north of Red sea-north of Persian Golf front and composition of subtropical jet stream and polar front jet steam in the east of Iraq can be from reasons of producing and strengthening of vertical movements. Also, analysis of Q-vector maps with point of convergence regions shows the important role Caspian sea, Mediterranean sea, Black sea, Persian Golf and Oman sea to producing of raising movements in different levels and times and its follow to forming of heavy rainfall events in the southern coastal Caspian sea and Iran. |
| first_indexed | 2024-04-24T22:30:07Z |
| format | Article |
| id | doaj.art-1418d9de57bc4cafb3b4d9a883cd1e37 |
| institution | Directory Open Access Journal |
| issn | 2008-8078 2717-3534 |
| language | fas |
| last_indexed | 2024-04-24T22:30:07Z |
| publishDate | 2012-11-01 |
| publisher | University of Tabriz |
| record_format | Article |
| series | نشریه جغرافیا و برنامهریزی |
| spelling | doaj.art-1418d9de57bc4cafb3b4d9a883cd1e372024-03-19T21:51:28ZfasUniversity of Tabrizنشریه جغرافیا و برنامهریزی2008-80782717-35342012-11-01164119723647Synoptic and Dynamic Analysis of Heavy Rainfall Events in the Southern Coastal Caspian Sea In Comparison With Iran Case Study (1381/9/15-1381/9/20)Hamid Noori0Alireza Yildroomi1University MalayerDistrictUniversity MalayerDistrictThis research, one of the most covering rainfall times (from1381/8/6 to 1381/10/5) in Iran study and then synoptic and dynamic analysis of it's the heaviest rainfall cluster (from 1381/9/15 to 1381/9/20) explain using environmental to circulation pattern method. In this time more than 60% of Iran stations experienced rainfall and also, the number of heavy rainfall events were recorded in the southern coastal Caspian see. After drawing of Isorain maps in studied days, rain maximum points and its gravity centers calculated. Then, pressure surface patterns, geopotential, humidity advection, front, jet stream and Q-vector maps were drawn in different levels. Analysis of pressure of see level maps showed that pressure gradient reinforcement between Black see high pressure and Mediterranean low pressure and between Black see high pressure and the eastern north of Caspian sea low pressure are effective to produce these heavy rainfalls in west, southern west of Iran and the southern coastal Caspian sea. Maps geopotential showed that there are two main patterns in this studied time, as role of the eastern north of Caspian Sea trough (part of long through of Mediterranean) is very important. Analysis of humidity advection maps showed that Mediterranean sea and Red sea in upper levels and Persian Golf and Oman sea in lower levels are sources of humidity for heavy rainfalls, as them role in different days aren’t alike. However, heavy rainfall events in the southern coastal Caspian sea were provided via Mediterranean sea in 500(ha) level, Mediterranean sea and Red sea in 600 and 700 (ha) levels and all of main sources of humidity (Black sea, Mediterranean sea, Persian Golf, Red sea and Caspian sea). Polar front, north of Red sea-north of Persian Golf front and composition of subtropical jet stream and polar front jet steam in the east of Iraq can be from reasons of producing and strengthening of vertical movements. Also, analysis of Q-vector maps with point of convergence regions shows the important role Caspian sea, Mediterranean sea, Black sea, Persian Golf and Oman sea to producing of raising movements in different levels and times and its follow to forming of heavy rainfall events in the southern coastal Caspian sea and Iran.https://geoplanning.tabrizu.ac.ir/article_47_080f0b2a08f0c884bb746d631a97db44.pdfsynoptic and dynamic analysisheavy and covering rainfall eventsgravity rainfall centersthe southern coastal caspian sea |
| spellingShingle | Hamid Noori Alireza Yildroomi Synoptic and Dynamic Analysis of Heavy Rainfall Events in the Southern Coastal Caspian Sea In Comparison With Iran Case Study (1381/9/15-1381/9/20) نشریه جغرافیا و برنامهریزی synoptic and dynamic analysis heavy and covering rainfall events gravity rainfall centers the southern coastal caspian sea |
| title | Synoptic and Dynamic Analysis of Heavy Rainfall Events in the Southern Coastal Caspian Sea In Comparison With Iran
Case Study (1381/9/15-1381/9/20) |
| title_full | Synoptic and Dynamic Analysis of Heavy Rainfall Events in the Southern Coastal Caspian Sea In Comparison With Iran
Case Study (1381/9/15-1381/9/20) |
| title_fullStr | Synoptic and Dynamic Analysis of Heavy Rainfall Events in the Southern Coastal Caspian Sea In Comparison With Iran
Case Study (1381/9/15-1381/9/20) |
| title_full_unstemmed | Synoptic and Dynamic Analysis of Heavy Rainfall Events in the Southern Coastal Caspian Sea In Comparison With Iran
Case Study (1381/9/15-1381/9/20) |
| title_short | Synoptic and Dynamic Analysis of Heavy Rainfall Events in the Southern Coastal Caspian Sea In Comparison With Iran
Case Study (1381/9/15-1381/9/20) |
| title_sort | synoptic and dynamic analysis of heavy rainfall events in the southern coastal caspian sea in comparison with iran case study 1381 9 15 1381 9 20 |
| topic | synoptic and dynamic analysis heavy and covering rainfall events gravity rainfall centers the southern coastal caspian sea |
| url | https://geoplanning.tabrizu.ac.ir/article_47_080f0b2a08f0c884bb746d631a97db44.pdf |
| work_keys_str_mv | AT hamidnoori synopticanddynamicanalysisofheavyrainfalleventsinthesoutherncoastalcaspianseaincomparisonwithirancasestudy13819151381920 AT alirezayildroomi synopticanddynamicanalysisofheavyrainfalleventsinthesoutherncoastalcaspianseaincomparisonwithirancasestudy13819151381920 |