| 1980年夏季我国天气气候反常和St.Helens火山爆发的影响 |
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| 引用本文： | 徐群.1980年夏季我国天气气候反常和St.Helens火山爆发的影响[J].气象学报,1986,44(4):426-432. |
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| 作者姓名： | 徐群 |
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| 作者单位： | 江苏省气象科学研究所 |
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| 摘 要： | 1980年5月18日St.Helens火山大爆发,大量火山灰喷入平流层,围绕北半球中纬度带飘浮。在30°N以北我国东部各站晴空直接辐射量(S)从6月上旬开始异常偏低,夏季S达到近二十余年来的最低值,夏季中纬度S的经向梯度异常增大;相应地,西太平洋副高及北侧的季风雨带在7—8月异常偏南,形成了我国严重的北旱南涝以及江淮冷夏等反常天气气候。本文现就此作物理分析。
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| 收稿时间： | 1982/12/6 0:00:00 |
| 修稿时间： | 1985/10/25 0:00:00 |
THE ABNORMAL WEATHER OF CHINA FOR SUMMER 1980 AND ITS RELATIONSHIP WITH THE VOLCANIC ERUPTIONS OF ST.HELENS |
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| Xu Qun.THE ABNORMAL WEATHER OF CHINA FOR SUMMER 1980 AND ITS RELATIONSHIP WITH THE VOLCANIC ERUPTIONS OF ST.HELENS[J].Acta Meteorologica Sinica,1986,44(4):426-432. |
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| Authors: | Xu Qun |
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| Institution: | Meteorological Institute of Jiangsu |
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| Abstract: | The occurrence of the abnormal weather of China in summer 1980 was intimately related with the eruption of Mt.St.Helens in May 1980 which is one of the great volcanic eruptions since 1900.Throwing up to the stratosphere and floating with the Jet,large quantities of volcanic dusts continually circulated around the temperate zone of Northern Hemisphere.Measurement of the direct solar radiation (S) of clear skies from East China north of 30°N has proved that an abnormal lowering of S had commenced since early 3une and dropped down to a minimum for recent 22 summery records,it changed little in the region south of 30° N.Thus,the enhanced meriodinal gradient of the solar heating forced the west Pacific subtropical high and the monsoon rainy belt retreating southward in early July to an abnormal seasonal location during July and August.So,the large scale drought in North China,the great waterlogging in Changjiang and the cold summer prevailing over Changjiang-Nuaihe valleys occurred. |
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