【摘要】 分析粤港澳7个气象站近100年来降水量变化趋势,并对其与全球气候变暖的关系进行分析。结果表明:广东省全年及前、后汛期的降水量变化存在2~7年、10年和30年左右的周期;广东省雨量的长期变化与全球气候变暖不存在一致性,但近期气候变暖和广东的重旱、重涝事件频率增加有关;目前,广东的年降水量处于长期变化中的峰值下滑趋势,预估2020年处于少雨时期,沿海地区重旱、轻旱出现频率增加。更多还原

【Abstract】 Trend analysis is conducted on the precipitation during last near century to investigate its relationship with global warming.The result shows that there exist cycles of 2-7ys,10a and 30a in precipitation of annual,Apr.-Jun.and Jul.-Sep.rainy seasons,and that the long-term trend of precipitation in Guangdong isn’t in accord with global warming,while the increasing frequency of severe drought/flood events can be related to recent climate warming.The annual precipitation of Guangdong is currently falling into a decline from the peak in a long-term cycle,and thus it is forecasted that the time around 2020 would be a period of low precipitation.更多还原