1961—2020年中国北方向日葵种植区干湿变化特征及其成因分析
王晓晨1,2(), 马雪晴1,2, 和骅芸1,2, 任思琪1,2, 唐书玥1,2, 赵金媛1,2, 潘志华1,2, 王靖1,2, 潘学标1,2, 胡琦1,2()
Characteristics of dry and wet changes in sunflower growing areas in northern China and their causes from 1961 to 2020
WANG Xiaochen1,2(), MA Xueqing1,2, HE Huayun1,2, REN Siqi1,2, TANG Shuyue1,2, ZHAO Jinyuan1,2, PAN Zhihua1,2, WANG Jing1,2, PAN Xuebiao1,2, HU Qi1,2()

图4. 1961—2020年中国北方向日葵种植区生长季不同等级干旱频率空间分布(单位:%)
(a)轻度干旱,(b)中度干旱,(c)重度干旱

Fig.4. The spatial distribution of occurrence frequency of drought with different levels during sunflower growth period in planting areas in northern China from 1961 to 2020(Unit: %)
(a) light drought, (b) medium drought, (c) serious drought