热带地理 ›› 2018, Vol. 38 ›› Issue (5): 660-667.doi: 10.13284/j.cnki.rddl.003067
李悦佳a,贺新光a,b,卢希安a,谭子芳a
出版日期:
2018-09-05
发布日期:
2018-09-05
通讯作者:
贺新光(1973―),男,湖南新化人,教授,博士,主要从事水文气象学研究,(E-mail)xghe@hunnu.edu.cn。
作者简介:
李悦佳(1994―),女,贵州六盘水人,硕士研究生,主要从事气象与气候变化研究,(E-mail)Yokali14@163.com。
基金资助:
国家自然科学基金(41472238);湖南省十二五重点学科地理学(20110001)
LI Yuejiaa,HE Xinguanga,b,LU Xi’ana,TAN Zifanga
Online:
2018-09-05
Published:
2018-09-05
摘要:
基于1960―2015年长江流域128个站点的月风速观测数据,结合地形特点将长江流域分成5个子区域,并运用一元线性回归、相关分析和修正的Mann-Kendall(MMK)检验对长江流域风速变化趋势的时空特征进行研究,结果表明:1)1960―2015年长江流域年平均风速以-0.006 5 m/s·a的速率显著下降,5个子区域中,区域中下游丘陵与平原区(R1)下降最显著,上游青藏高原区(R5)次之,上游盆地区(R3)变化最小。2)季节上,全区风速春季下降最快,夏季最慢。而子区域除R1冬季降幅最大外,其余区域季节风速变化速率也为春季降幅最大,夏季最小。逐月变化上,流域整体风速3月下降最快,8月最慢,各子区域风速最大降幅也集中在3月。3)空间分布上,长江流域年平均风速降幅呈现东部大、中部小、西部较大的特点,全区50%的站点下降趋势显著,且这些站点集中分布于R1地区。此外,4个季节风速与年风速的变化趋势呈现相似的空间分布特征。4)长江流域风速下降与北极涛动(AO)指数上升、区域气候变暖和城市化加速等有关。
李悦佳,贺新光,卢希安,谭子芳. 1960―2015年长江流域风速的时空变化特征[J]. 热带地理, 2018, 38(5): 660-667.
LI Yuejia,HE Xinguang,LU Xi’an and TAN Zifang. Spatio-temporal Variability of Wind Speed in the Yangtze River Basin during 1960-2015[J]. TROPICAL GEOGRAPHY, 2018, 38(5): 660-667.
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