厄尔尼诺事件年际变化与我国华北夏季干旱的关系
郝立生, 何丽烨, 马宁, 郝钰茜

Relationship between interannual variability of El Niño events and summer droughts in North China
HAO Lisheng, HE Liye, MA Ning, HAO Yuqian
图6 1961—2022年华北夏季干旱年200 hPa(a)、500 hPa(b)气候平均位势高度(等值线)及高度距平(填色)(单位:dagpm)和200 hPa(a)与850 hPa(c)水平风速距平(箭矢,单位:m·s-1)空间分布
(异常值是对降水量序列回归重构的结果, 打点区及黑色箭矢通过α=0.05的显著性检验,下同)
Fig.6 Spatial distributions of climatological mean geopotential height (isolines) and height anomaly (the color shaded) at 200 hPa (a) and 500 hPa (b) (Unit: dagpm) and horizontal wind speed anomalies at 200 hPa (a) and 850 hPa (c) (arrow vectors, Unit: m·s-1) in summer drought years in North China during 1961-2022
(The abnormal values are reconstructed by regression upon the precipitation series, the dotted areas and thick black arrows are values passing significance test at α=0.05, the same as below)