| LARGE-SCALE CIRCULATION CONDITIONS AFFECTING THE HURRICANE FORMATION OVER THE NORTH ATLANTIC OCEAN |
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| 作者姓名： | 丁一汇 ELMAR R. REITER |
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| 作者单位： | Institute of Atmospheric Physics Academia Sinica，Department of Atmospheric Sciences，Colorado State University，U.S.A. |
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| 摘 要： | A contrasting study of the large-scale circulation features responsible for months or seasons with many hurricanes and those with few hurricanes has revealed that the frequency of hurricane formation over the North Atlantic Ocean is enhanced by the following conditions:There exists a well-developed subtropical high-pressure belt displaced to the north; a deep Icelandic low; a stronger-than-normal polar vortex with a deep polar trough dipping far southward along the eastern part of the United States; a dominant high-pressure ridge over western Canada and the United States; and a jet stream displaced northward over these regions. At 200 hPa, an anomalous anticyclonic circulation prevails over the subtropical North Atlantic. A stronger-than-normal upper easterly flow prevails. Positive sea surface temperature anomalies prevailing on a seasonal or long-term basis tend to be favorable for the formation of hurricanes.
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| 收稿时间： | 1983/12/29 0:00:00 |
| 修稿时间： | 3/5/1984 12:00:00 AM |
LARGE-SCALE CIRCULATION CONDITIONS AFFECTING THE HURRICANE FORMATION OVER THE NORTH ATLANTIC OCEAN |
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| DING YIHUI and ELMAR R. REITER.LARGE-SCALE CIRCULATION CONDITIONS AFFECTING THE HURRICANE FORMATION OVER THE NORTH ATLANTIC OCEAN[J].Acta Oceanologica Sinica,1985,4(1):21-34. |
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| Authors: | DING YIHUI and ELMAR R REITER |
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| Institution: | 1.Institute of Atmospheric Physics, Academia Sinica2.Department of Atmospheric Sciences, Colorado State University, U.S.A. |
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| Abstract: | A contrasting study of the large-scale circulation features responsible for months or seasons with many hurricanes and those with few hurricanes has revealed that the frequency of hurricane formation over the North Atlantic Ocean is enhanced by the following conditions:There exists a well-developed subtropical high-pressure belt displaced to the north; a deep Icelandic low; a stronger-than-normal polar vortex with a deep polar trough dipping far southward along the eastern part of the United States; a dominant high-pressure ridge over western Canada and the United States; and a jet stream displaced northward over these regions. At 200 hPa, an anomalous anticyclonic circulation prevails over the subtropical North Atlantic. A stronger-than-normal upper easterly flow prevails. Positive sea surface temperature anomalies prevailing on a seasonal or long-term basis tend to be favorable for the formation of hurricanes. |
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