摘要
根据山东省1960—2018年的逐月降水量观测数据,采用标准化降水指数(SPI)作为干旱衡量指标,分析近59年来山东省冬小麦生长期的干旱时空分布特征,研究冬小麦各生长阶段干旱强度及影响范围,为山东省冬小麦的干旱防御及稳定增收提供参考.研究表明:(1)冬小麦生长期内干旱频率多集中在15%~20%之间,相对高值区集中于山东省的中东部和西南部.(2)1980—1989年干旱频率最高,1990—2018年间干旱频率的高值区呈现出由西北向东南转移的趋势.(3)冬小麦生长期干旱站次比在波动变化中表现出较明显的阶段性特征:1977—1991年、1998—2002年和2010—2014年为干旱影响范围较大的时段;其他时段为干旱影响范围较小的时段.(4)干旱覆盖范围以局域性干旱为主.
Based on the monthly precipitation data,the standardized precipitation index(SPI)is used as the drought indicator to analyze the spatial and temporal distribution characteristics of drought intensity and range in the winter wheat growth period of Shandong Province during the past 59 years.The result of the study could provide a reference for the drought prevention and steadily increasing yields of winter wheat in Shandong.The results show that:(1)the drought frequency in the growing period of winter wheat was mostly concentrated between 15%and 20%.The areas with relatively high drought frequency were concentrated in the central,eastern and southwestern parts of Shandong Province.(2)The drought frequency was the highest in the period from 1980 to 1989.The areas with high drought frequency shifted from northwest to southeast during the period 1990—2018.(3)In the growth period of winter wheat,the drought station ratio showed obviously periodical characteristics in fluctuations.1977—1991,1998—2002 and 2010—2014 were the periods with a large drought impact range,while others were the periods with small drought impact range.(4)The coverage of drought was mainly local drought.
作者
苏喆
廉丽姝
刘元月
潘雪
王云倩
任玮
SU Zhe;LIAN Lishu;LIU Yuanyue;PAN Xue;WANG Yunqian;REN Wei(School of Geography and Tourism,Qufu Normal University,276826,Rizhao,Shandong,PRC)
出处
《曲阜师范大学学报（自然科学版）》
CAS
2021年第1期99-106,共8页
Journal of Qufu Normal University(Natural Science)
基金
大学生创新创业训练计划项目(JLXJDN2019027)
教育部人文社科项目(16YJCZH089).
关键词
标准化降水指数
冬小麦
干旱
时空分布
山东省
standardized precipitation index
winter wheat
drought
spatiotemporal distribution
Shandong Province
