On the intra-annual variability of relative vorticity in the Middle East and the Eastern Meditteranean

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Amiri azita; HEJAZIZADEH ZAHRA; ALIJANI BOHLOL; FATTAHI EBRAHIM; AZADI MAJID

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Journal: JOURNAL OF CLIMATE RESEARCH Year:2017 | Volume:8 | Issue:29-30 Page(s): 55-71

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Title

On the intra-annual variability of relative vorticity in the Middle East and the Eastern Meditteranean

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Keywords

Relative VorticityQ1

principal component analysisQ1

Middle EastQ2

Easthern MediterraneanQ1

Abstract

In the upper level (300 hPa) a widespread positive vorticity has seen on the Mediterranean and the Black Sea. In this level, the length of summertime became more than ago from 1990s and the negative vorticity has increased in the recent decades. In the 500 hPa level the positive vorticity intensity on the Cyprus and Turkish area has decreased from 1990s. The cold season in the lower level is finished earlier than middle level because at this time air is warmer than sea but at the middle level the cold period takes longer so in this level cold air mass privates yet. There is an increasing trend of negative vorticity in the west and positive vorticity in the east of the Caspian sea in the cold period of the 850 hPa level that is in agreement with a decreasing of the intensity of Siberian high pressure and a weakening of the Black Sea low pressure system from 1980s.

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APA: Copy

Amiri, azita, HEJAZIZADEH, ZAHRA, ALIJANI, BOHLOL, FATTAHI, EBRAHIM, & AZADI, MAJID. (2017). On the intra-annual variability of relative vorticity in the Middle East and the Eastern Meditteranean. JOURNAL OF CLIMATE RESEARCH, 8(29-30 ), 55-71. SID. https://sid.ir/paper/213089/en

Vancouver: Copy

Amiri azita, HEJAZIZADEH ZAHRA, ALIJANI BOHLOL, FATTAHI EBRAHIM, AZADI MAJID. On the intra-annual variability of relative vorticity in the Middle East and the Eastern Meditteranean. JOURNAL OF CLIMATE RESEARCH[Internet]. 2017;8(29-30 ):55-71. Available from: https://sid.ir/paper/213089/en

IEEE: Copy

azita Amiri, ZAHRA HEJAZIZADEH, BOHLOL ALIJANI, EBRAHIM FATTAHI, and MAJID AZADI, “On the intra-annual variability of relative vorticity in the Middle East and the Eastern Meditteranean,” JOURNAL OF CLIMATE RESEARCH, vol. 8, no. 29-30 , pp. 55–71, 2017, [Online]. Available: https://sid.ir/paper/213089/en

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