| A STUDY ON THE VARIATION OF DROUGHT PERIODS OCCURRING IN NORTHWEST CHINA AND OTHER AFRICA-ASIA CONTINENTAL REGIONS |
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| 作者姓名： | Sun Guawu Ye Qian |
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| 作者单位： | Lanzhou Institute of Arid Meteorology.Lanzhou 730020，CIRES/NOAA University of Colorado.Boulder.CO 80309-0449，USA |
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| 摘 要： | Characteristics of the drought periods which occurred in North Africa,Middle East,Middle Asiaand Northwest China were studied based on the analysis of rainfall data from 1870—1990.It is foundthat the drought periods first started in North Africa and expanded eastward to Northwest Chinathrough Middle East and Middle Asia in about 27.5 years.And then a new teleconnection pattern of30—50 day low-frequency oscillation which is associated with the droughts over the Africa-Asia Con-tinent was discovered.Finally,a hypothesis is proposed based on the statistical results that the east-ward expansion of drought periods may be caused by the occurrence of giant earthquakes(Ms>6.0)which have a tendency to shift eastward from North Africa to Northwest China in about 27.75 years.
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| 收稿时间： | 1994/2/20 0:00:00 |
| 修稿时间： | 1996/4/24 0:00:00 |
A STUDY ON THE VARIATION OF DROUGHT PERIODS OCCURRING IN NORTHWEST CHINA AND OTHER AFRICA-ASIA CONTINENTAL REGIONS |
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| Sun Guawu,Ye Qian.A STUDY ON THE VARIATION OF DROUGHT PERIODS OCCURRING IN NORTHWEST CHINA AND OTHER AFRICA-ASIA CONTINENTAL REGIONS[J].Acta Meteorologica Sinica,1996,10(4):473-484. |
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| Authors: | Sun Guawu and Ye Qian |
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| Institution: | Sun Guawu Lanzhou Institute of Arid Meteorology.Lanzhou 730020
Ye Qian CIRES/NOAA,University of Colorado.Boulder,CO 80309-0449.USA |
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| Abstract: | Characteristics of the drought periods which occurred in North Africa,Middle East,Middle Asia and Northwest China were studied based on the analysis of rainfall data from 1870-1990.It is found that the drought periods first started in North Africa and expanded eastward to Northwest China through Middle East and Middle Asia in about 27.5 years.And then a new teleconnection pattern of 30-50 day low-frequency oscillation which is associated with the droughts over the Africa-Asia Continent was discovered.Finally,a hypothesis is proposed based on the statistical results that the eastward expansion of drought periods may be caused by the occurrence of giant earthquakes(Ms>6.0) which have a tendency to shift eastward from North Africa to Northwest China in about 27.75 years. |
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| Keywords: | drought period teleconnection pattern drought expansion earthquake shifting thermodynamic process |
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