外强迫因子对宁夏初霜冻日期的影响及其预测

黄莹, 杨建玲, 孙银川, 王璠, 王素艳, 王岱

Influence of external forcing factors on first frost date and its predition in Ningxia

HUANG Ying, YANG Jianling, SUN Yinchuan, WANG Fan, WANG Suyan, WANG Dai

图3 1981—2019年5—8月北半球积雪面积距平(a)、1—7月格陵兰海冰面积距平(b)与宁夏初霜冻日期距平年际变化

Fig.3 The inter-annual variation of snow area anomaly from May to August in the northern hemisphere and first frost date anomaly in Ningxia (a), Greenland sea ice area anomaly from January to July and first frost date anomaly in Ningxia (b) during 1981-2019