【摘要】 松嫩平原是东北三大平原之一,是国家最为重要的商品粮豆基地。文章选择松嫩平原地区45个气象站自建站以来5~9月份月降水资料,将5~9月作为生长季。分析了松嫩平原地区降水的时间序列特征,并利用Mann-Kendall趋势检验法和R/S分析法,研究了松嫩平原地区降水资源的趋势性特征和持续性特征。结果表明,整个松嫩平原地区生长季降水量呈现出减少趋势,减少量为0.88mm/a。降水资源的变化趋势与过去51年的变化趋势一致,即将来降水资源仍然表现为减少趋势。更多还原

【Abstract】 Songnen Plain,which is one of the three biggest plains in Northeast China,is one of the most important commodity grain bases in China.Choosing the 45 meteorological stations in Songnen Plain and using the monthly precipitation data(from May to September),the time series characteristics and special distribution characteristics of growing season precipitation in Songnen Plain were analyzed.The tendency characteristics of growing season precipitation in Songnen Plain were discussed by using Mann-Kendall trend test.The persistence characteristics of growing season precipitation in Songnen Plain were analyzed by using R/S method.It was found that the precipitation in growing season of Songnen Plain decreased by 0.88mm/a.The change tendency of growing season precipitation was the same as the last 50 years.更多还原