| 摘要: |
| 本文分析了我国华南水稻天气产量、降水天气、大型气压环流三者的联系。揭示了"环流—天气—天气产量"具有20—30年左右的长周期振动和2—3年的短周期振动。长期振动模式描述为,北半球春季由太平洋赤道低压带与澳洲附近高压带组合的"南方涛动"偏弱时,相应地,夏季北太平洋高压偏强,华南处于多水期。水稻天气产量偏低。反之,华南处于少水期,水稻天气产量偏高。 |
| 关键词: |
| DOI： |
| 分类号: |
| 基金项目: |
|
| ANALYSIS OH THE LONG-TERM FLUCTUATION OF THE LARGE-SCALE CIRCULATION AND THE CHANGE OF WEATHER YIELD OF CORN IN THE SOUTH OF CHINA |
|
Wang Duo1, Zhang Tan2
|
|
1.Zhejiang Teachers' College;2.Beijing University
|
| Abstract: |
| The purpose of this paper is to investigate the system of "circulation pattern-weather-corn yield" for the southern region of China. A long-term fluctuation of 20-30-yr period and a short-term fluctuation of 2-3-yr period for the system are discovered. The characters of the quasi-periodic fluctuations of the large-scale circulation systems are explicated. The model of long-term fluctuation for "Circulation pattern-weather-corn yield" for the southern region of China can be summarised as that when Australia high pressure and Pacific equatorial depression belt are weaker in spring,the Northern Pacific] anticyclone will be stronger in summer,so that there will be a wet period and a low weather yield period for rics there.In reverse,tthere will be a dry period and a high weather yield period for rice there. |
| Key words: |
