【摘要】 对黄土高原1961～2000年近40a气候生产力变化进行分析,结果表明:黄土高原气候生产力南北部有反向变化趋势,其演变过程在1984年明显转变,南部转向降低、北部升高;东西变化过程在1982年存在变点,有东部减少、西部增多的趋势;生产力在时间演变中以2～4a和8a左右的年际振荡为主,4a左右的振荡最突出。更多还原

【Abstract】 By investigating the distribution and change of climate-productivity on Loess Plateau during recent 40 years, it was shown that the climate-productivity evolved with opposite phase between north and south, as well as east and west. As for the change of north and south, the turning point was in 1984, the climate-productivity decreased remarkably in the south but rose in the north. As for the change of east and west, the turning point was in 1982, the climate-productivity tended to decrease in the east but increase in the west. By using wavelet analysis, the 2~4 years and 8 years variation period was identified on precipitation, and the 4 years period was most outstanding.更多还原